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Commit f86020fa authored by Fabian Zimmer's avatar Fabian Zimmer
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Moved database pages to setup folder 

Moved the pages into the setup folder and fixed the broken
links in the other pages. This brings us closer to a more
jobs to be done focused documentation.
parent d81fd9e9
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doc/administration/geo/disaster_recovery/bring_primary_back.md
View file @ f86020fa
......@@ -45,7 +45,7 @@ To bring the former **primary** node up to date:
all the writes to this node](planned_failover.md#prevent-updates-to-the-primary-node)
during this procedure.
1. [Setup database replication](../replication/database.md). Note that in this
1. [Setup database replication](../setup/database.md). Note that in this
case, **primary** node refers to the current **primary** node, and **secondary** node refers to the
former **primary** node.
......
doc/administration/geo/disaster_recovery/index.md
View file @ f86020fa
......@@ -375,7 +375,7 @@ and after that you also need two extra steps.
gitlab_rails['auto_migrate'] = false
```
(For more details about these settings you can read [Configure the primary server](../replication/database.md#step-1-configure-the-primary-server))
(For more details about these settings you can read [Configure the primary server](../setup/database.md#step-1-configure-the-primary-server))
1. Save the file and reconfigure GitLab for the database listen changes and
the replication slot changes to be applied.
......@@ -408,7 +408,7 @@ and after that you also need two extra steps.
### Step 2. Initiate the replication process
Now we need to make each **secondary** node listen to changes on the new **primary** node. To do that you need
to [initiate the replication process](../replication/database.md#step-3-initiate-the-replication-process) again but this time
to [initiate the replication process](../setup/database.md#step-3-initiate-the-replication-process) again but this time
for another **primary** node. All the old replication settings will be overwritten.
## Troubleshooting
......
doc/administration/geo/replication/database.md
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
redirect_to: '../setup/database.md'
---
# Geo database replication **(PREMIUM ONLY)**
NOTE: **Note:**
If your GitLab installation uses external (not managed by Omnibus) PostgreSQL
instances, the Omnibus roles will not be able to perform all necessary
configuration steps. In this case,
[follow the Geo with external PostgreSQL instances document instead](external_database.md).
NOTE: **Note:**
The stages of the setup process must be completed in the documented order.
Before attempting the steps in this stage, [complete all prior stages](../setup/index.md#using-omnibus-gitlab).
This document describes the minimal steps you have to take in order to
replicate your **primary** GitLab database to a **secondary** node's database. You may
have to change some values according to your database setup, how big it is, etc.
You are encouraged to first read through all the steps before executing them
in your testing/production environment.
## PostgreSQL replication
The GitLab **primary** node where the write operations happen will connect to
the **primary** database server, and **secondary** nodes will
connect to their own database servers (which are also read-only).
We recommend using [PostgreSQL replication slots](https://medium.com/@tk512/replication-slots-in-postgresql-b4b03d277c75)
to ensure that the **primary** node retains all the data necessary for the **secondary** nodes to
recover. See below for more details.
The following guide assumes that:
- You are using Omnibus and therefore you are using PostgreSQL 11 or later
which includes the [`pg_basebackup` tool](https://www.postgresql.org/docs/11/app-pgbasebackup.html).
- You have a **primary** node already set up (the GitLab server you are
replicating from), running Omnibus' PostgreSQL (or equivalent version), and
you have a new **secondary** server set up with the same versions of the OS,
PostgreSQL, and GitLab on all nodes.
CAUTION: **Warning:**
Geo works with streaming replication. Logical replication is not supported at this time.
There is an [issue where support is being discussed](https://gitlab.com/gitlab-org/gitlab/-/issues/7420).
### Step 1. Configure the **primary** server
1. SSH into your GitLab **primary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** name for your node:
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
1. GitLab 10.4 and up only: Do the following to make sure the `gitlab` database user has a password defined:
NOTE: **Note:**
Until FDW settings are removed in GitLab version 14.0, avoid using single or double quotes in the
password for PostgreSQL as that will lead to errors when reconfiguring.
Generate a MD5 hash of the desired password:
```shell
gitlab-ctl pg-password-md5 gitlab
# Enter password: <your_password_here>
# Confirm password: <your_password_here>
# fca0b89a972d69f00eb3ec98a5838484
```
Edit `/etc/gitlab/gitlab.rb`:
```ruby
# Fill with the hash generated by `gitlab-ctl pg-password-md5 gitlab`
postgresql['sql_user_password'] = '<md5_hash_of_your_password>'
# Every node that runs Puma or Sidekiq needs to have the database
# password specified as below. If you have a high-availability setup, this
# must be present in all application nodes.
gitlab_rails['db_password'] = '<your_password_here>'
```
1. Omnibus GitLab already has a [replication user](https://wiki.postgresql.org/wiki/Streaming_Replication)
called `gitlab_replicator`. You must set the password for this user manually.
You will be prompted to enter a password:
```shell
gitlab-ctl set-replication-password
```
This command will also read the `postgresql['sql_replication_user']` Omnibus
setting in case you have changed `gitlab_replicator` username to something
else.
If you are using an external database not managed by Omnibus GitLab, you need
to create the replicator user and define a password to it manually:
```sql
--- Create a new user 'replicator'
CREATE USER gitlab_replicator;
--- Set/change a password and grants replication privilege
ALTER USER gitlab_replicator WITH REPLICATION ENCRYPTED PASSWORD '<replication_password>';
```
1. Configure PostgreSQL to listen on network interfaces:
For security reasons, PostgreSQL does not listen on any network interfaces
by default. However, Geo requires the **secondary** node to be able to
connect to the **primary** node's database. For this reason, we need the address of
each node.
NOTE: **Note:**
For external PostgreSQL instances, see [additional instructions](external_database.md).
If you are using a cloud provider, you can lookup the addresses for each
Geo node through your cloud provider's management console.
To lookup the address of a Geo node, SSH in to the Geo node and execute:
```shell
##
## Private address
##
ip route get 255.255.255.255 | awk '{print "Private address:", $NF; exit}'
##
## Public address
##
echo "External address: $(curl --silent ipinfo.io/ip)"
```
In most cases, the following addresses will be used to configure GitLab
Geo:
| Configuration | Address |
|:----------------------------------------|:------------------------------------------------------|
| `postgresql['listen_address']` | **Primary** node's public or VPC private address. |
| `postgresql['md5_auth_cidr_addresses']` | **Secondary** node's public or VPC private addresses. |
If you are using Google Cloud Platform, SoftLayer, or any other vendor that
provides a virtual private cloud (VPC) you can use the **primary** and **secondary** nodes
private addresses (corresponds to "internal address" for Google Cloud Platform) for
`postgresql['md5_auth_cidr_addresses']` and `postgresql['listen_address']`.
The `listen_address` option opens PostgreSQL up to network connections with the interface
corresponding to the given address. See [the PostgreSQL documentation](https://www.postgresql.org/docs/11/runtime-config-connection.html)
for more details.
NOTE: **Note:**
If you need to use `0.0.0.0` or `*` as the listen_address, you will also need to add
`127.0.0.1/32` to the `postgresql['md5_auth_cidr_addresses']` setting, to allow Rails to connect through
`127.0.0.1`. For more information, see [omnibus-5258](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5258).
Depending on your network configuration, the suggested addresses may not
be correct. If your **primary** node and **secondary** nodes connect over a local
area network, or a virtual network connecting availability zones like
[Amazon's VPC](https://aws.amazon.com/vpc/) or [Google's VPC](https://cloud.google.com/vpc/)
you should use the **secondary** node's private address for `postgresql['md5_auth_cidr_addresses']`.
Edit `/etc/gitlab/gitlab.rb` and add the following, replacing the IP
addresses with addresses appropriate to your network configuration:
```ruby
##
## Geo Primary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_primary_role']
##
## Primary address
## - replace '<primary_node_ip>' with the public or VPC address of your Geo primary node
##
postgresql['listen_address'] = '<primary_node_ip>'
##
# Allow PostgreSQL client authentication from the primary and secondary IPs. These IPs may be
# public or VPC addresses in CIDR format, for example ['198.51.100.1/32', '198.51.100.2/32']
##
postgresql['md5_auth_cidr_addresses'] = ['<primary_node_ip>/32', '<secondary_node_ip>/32']
##
## Replication settings
## - set this to be the number of Geo secondary nodes you have
##
postgresql['max_replication_slots'] = 1
# postgresql['max_wal_senders'] = 10
# postgresql['wal_keep_segments'] = 10
##
## Disable automatic database migrations temporarily
## (until PostgreSQL is restarted and listening on the private address).
##
gitlab_rails['auto_migrate'] = false
```
1. Optional: If you want to add another **secondary** node, the relevant setting would look like:
```ruby
postgresql['md5_auth_cidr_addresses'] = ['<primary_node_ip>/32', '<secondary_node_ip>/32', '<another_secondary_node_ip>/32']
```
You may also want to edit the `wal_keep_segments` and `max_wal_senders` to match your
database replication requirements. Consult the [PostgreSQL - Replication documentation](https://www.postgresql.org/docs/11/runtime-config-replication.html)
for more information.
1. Save the file and reconfigure GitLab for the database listen changes and
the replication slot changes to be applied:
```shell
gitlab-ctl reconfigure
```
Restart PostgreSQL for its changes to take effect:
```shell
gitlab-ctl restart postgresql
```
1. Re-enable migrations now that PostgreSQL is restarted and listening on the
private address.
Edit `/etc/gitlab/gitlab.rb` and **change** the configuration to `true`:
```ruby
gitlab_rails['auto_migrate'] = true
```
Save the file and reconfigure GitLab:
```shell
gitlab-ctl reconfigure
```
1. Now that the PostgreSQL server is set up to accept remote connections, run
`netstat -plnt | grep 5432` to make sure that PostgreSQL is listening on port
`5432` to the **primary** server's private address.
1. A certificate was automatically generated when GitLab was reconfigured. This
will be used automatically to protect your PostgreSQL traffic from
eavesdroppers, but to protect against active ("man-in-the-middle") attackers,
the **secondary** node needs a copy of the certificate. Make a copy of the PostgreSQL
`server.crt` file on the **primary** node by running this command:
```shell
cat ~gitlab-psql/data/server.crt
```
Copy the output into a clipboard or into a local file. You
will need it when setting up the **secondary** node! The certificate is not sensitive
data.
### Step 2. Configure the **secondary** server
1. SSH into your GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Stop application server and Sidekiq
```shell
gitlab-ctl stop puma
gitlab-ctl stop sidekiq
```
NOTE: **Note:**
This step is important so we don't try to execute anything before the node is fully configured.
1. [Check TCP connectivity](../../raketasks/maintenance.md) to the **primary** node's PostgreSQL server:
```shell
gitlab-rake gitlab:tcp_check[<primary_node_ip>,5432]
```
NOTE: **Note:**
If this step fails, you may be using the wrong IP address, or a firewall may
be preventing access to the server. Check the IP address, paying close
attention to the difference between public and private addresses and ensure
that, if a firewall is present, the **secondary** node is permitted to connect to the
**primary** node on port 5432.
1. Create a file `server.crt` in the **secondary** server, with the content you got on the last step of the **primary** node's setup:
```shell
editor server.crt
```
1. Set up PostgreSQL TLS verification on the **secondary** node:
Install the `server.crt` file:
```shell
install \
-D \
-o gitlab-psql \
-g gitlab-psql \
-m 0400 \
-T server.crt ~gitlab-psql/.postgresql/root.crt
```
PostgreSQL will now only recognize that exact certificate when verifying TLS
connections. The certificate can only be replicated by someone with access
to the private key, which is **only** present on the **primary** node.
1. Test that the `gitlab-psql` user can connect to the **primary** node's database
(the default Omnibus database name is `gitlabhq_production`):
```shell
sudo \
-u gitlab-psql /opt/gitlab/embedded/bin/psql \
--list \
-U gitlab_replicator \
-d "dbname=gitlabhq_production sslmode=verify-ca" \
-W \
-h <primary_node_ip>
```
When prompted enter the password you set in the first step for the
`gitlab_replicator` user. If all worked correctly, you should see
the list of **primary** node's databases.
A failure to connect here indicates that the TLS configuration is incorrect.
Ensure that the contents of `~gitlab-psql/data/server.crt` on the **primary** node
match the contents of `~gitlab-psql/.postgresql/root.crt` on the **secondary** node.
1. Configure PostgreSQL:
This step is similar to how we configured the **primary** instance.
We need to enable this, even if using a single node.
Edit `/etc/gitlab/gitlab.rb` and add the following, replacing the IP
addresses with addresses appropriate to your network configuration:
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
##
## Secondary address
## - replace '<secondary_node_ip>' with the public or VPC address of your Geo secondary node
##
postgresql['listen_address'] = '<secondary_node_ip>'
postgresql['md5_auth_cidr_addresses'] = ['<secondary_node_ip>/32']
##
## Database credentials password (defined previously in primary node)
## - replicate same values here as defined in primary node
##
postgresql['sql_user_password'] = '<md5_hash_of_your_password>'
gitlab_rails['db_password'] = '<your_password_here>'
```
For external PostgreSQL instances, see [additional instructions](external_database.md).
If you bring a former **primary** node back online to serve as a **secondary** node, then you also need to remove `roles ['geo_primary_role']` or `geo_primary_role['enable'] = true`.
1. Reconfigure GitLab for the changes to take effect:
```shell
gitlab-ctl reconfigure
```
1. Restart PostgreSQL for the IP change to take effect:
```shell
gitlab-ctl restart postgresql
```
### Step 3. Initiate the replication process
Below we provide a script that connects the database on the **secondary** node to
the database on the **primary** node, replicates the database, and creates the
needed files for streaming replication.
The directories used are the defaults that are set up in Omnibus. If you have
changed any defaults, configure it as you see fit replacing the directories and paths.
CAUTION: **Warning:**
Make sure to run this on the **secondary** server as it removes all PostgreSQL's
data before running `pg_basebackup`.
1. SSH into your GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Choose a database-friendly name to use for your **secondary** node to
use as the replication slot name. For example, if your domain is
`secondary.geo.example.com`, you may use `secondary_example` as the slot
name as shown in the commands below.
1. Execute the command below to start a backup/restore and begin the replication
CAUTION: **Warning:**
Each Geo **secondary** node must have its own unique replication slot name.
Using the same slot name between two secondaries will break PostgreSQL replication.
```shell
gitlab-ctl replicate-geo-database \
--slot-name=<secondary_node_name> \
--host=<primary_node_ip>
```
NOTE: **Note:**
Replication slot names must only contain lowercase letters, numbers, and the underscore character.
When prompted, enter the _plaintext_ password you set up for the `gitlab_replicator`
user in the first step.
This command also takes a number of additional options. You can use `--help`
to list them all, but here are a couple of tips:
- If PostgreSQL is listening on a non-standard port, add `--port=` as well.
- If your database is too large to be transferred in 30 minutes, you will need
to increase the timeout, e.g., `--backup-timeout=3600` if you expect the
initial replication to take under an hour.
- Pass `--sslmode=disable` to skip PostgreSQL TLS authentication altogether
(e.g., you know the network path is secure, or you are using a site-to-site
VPN). This is **not** safe over the public Internet!
- You can read more details about each `sslmode` in the
[PostgreSQL documentation](https://www.postgresql.org/docs/11/libpq-ssl.html#LIBPQ-SSL-PROTECTION);
the instructions above are carefully written to ensure protection against
both passive eavesdroppers and active "man-in-the-middle" attackers.
- Change the `--slot-name` to the name of the replication slot
to be used on the **primary** database. The script will attempt to create the
replication slot automatically if it does not exist.
- If you're repurposing an old server into a Geo **secondary** node, you'll need to
add `--force` to the command line.
- When not in a production machine you can disable backup step if you
really sure this is what you want by adding `--skip-backup`
The replication process is now complete.
## PgBouncer support (optional)
[PgBouncer](https://www.pgbouncer.org/) may be used with GitLab Geo to pool
PostgreSQL connections. We recommend using PgBouncer if you use GitLab in a
high-availability configuration with a cluster of nodes supporting a Geo
**primary** node and another cluster of nodes supporting a Geo **secondary** node. For more
information, see [High Availability with Omnibus GitLab](../../postgresql/replication_and_failover.md).
## Troubleshooting
Read the [troubleshooting document](troubleshooting.md).
This document was moved to [another location](../setup/index.md).
doc/administration/geo/replication/external_database.md
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
redirect_to: '../setup/external_database.md'
---
# Geo with external PostgreSQL instances **(PREMIUM ONLY)**
This document is relevant if you are using a PostgreSQL instance that is *not
managed by Omnibus*. This includes cloud-managed instances like AWS RDS, or
manually installed and configured PostgreSQL instances.
NOTE: **Note:**
We strongly recommend running Omnibus-managed instances as they are actively
developed and tested. We aim to be compatible with most external
(not managed by Omnibus) databases but we do not guarantee compatibility.
## **Primary** node
1. SSH into a GitLab **primary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** ID for your node (arbitrary value):
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
### Configure the external database to be replicated
To set up an external database, you can either:
- Set up streaming replication yourself (for example, in AWS RDS).
- Perform the Omnibus configuration manually as follows.
#### Leverage your cloud provider's tools to replicate the primary database
Given you have a primary node set up on AWS EC2 that uses RDS.
You can now just create a read-only replica in a different region and the
replication process will be managed by AWS. Make sure you've set Network ACL, Subnet, and
Security Group according to your needs, so the secondary application node can access the database.
The following instructions detail how to create a read-only replica for common
cloud providers:
- Amazon RDS - [Creating a Read Replica](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html#USER_ReadRepl.Create)
- Azure Database for PostgreSQL - [Create and manage read replicas in Azure Database for PostgreSQL](https://docs.microsoft.com/en-us/azure/postgresql/howto-read-replicas-portal)
Once your read-only replica is set up, you can skip to [configure you secondary application node](#configure-secondary-application-nodes-to-use-the-external-read-replica).
#### Manually configure the primary database for replication
The [`geo_primary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
configures the **primary** node's database to be replicated by making changes to
`pg_hba.conf` and `postgresql.conf`. Make the following configuration changes
manually to your external database configuration and ensure that you restart PostgreSQL
afterwards for the changes to take effect:
```plaintext
##
## Geo Primary Role
## - pg_hba.conf
##
host all all <trusted primary IP>/32 md5
host replication gitlab_replicator <trusted primary IP>/32 md5
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
```
```plaintext
##
## Geo Primary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 50
max_replication_slots = 1 # number of secondary instances
hot_standby = on
```
## **Secondary** nodes
### Manually configure the replica database
Make the following configuration changes manually to your `pg_hba.conf` and `postgresql.conf`
of your external replica database and ensure that you restart PostgreSQL afterwards
for the changes to take effect:
```plaintext
##
## Geo Secondary Role
## - pg_hba.conf
##
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
host all all <trusted primary IP>/24 md5
```
```plaintext
##
## Geo Secondary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 10
hot_standby = on
```
### Configure **secondary** application nodes to use the external read-replica
With Omnibus, the
[`geo_secondary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
has three main functions:
1. Configure the replica database.
1. Configure the tracking database.
1. Enable the [Geo Log Cursor](../index.md#geo-log-cursor) (not covered in this section).
To configure the connection to the external read-replica database and enable Log Cursor:
1. SSH into a GitLab **secondary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add the following
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
# note this is shared between both databases,
# make sure you define the same password in both
gitlab_rails['db_password'] = '<your_password_here>'
gitlab_rails['db_username'] = 'gitlab'
gitlab_rails['db_host'] = '<database_read_replica_host>'
# Disable the bundled Omnibus PostgreSQL, since we are
# using an external PostgreSQL
postgresql['enable'] = false
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
### Configure the tracking database
**Secondary** nodes use a separate PostgreSQL installation as a tracking
database to keep track of replication status and automatically recover from
potential replication issues. Omnibus automatically configures a tracking database
when `roles ['geo_secondary_role']` is set.
If you want to run this database external to Omnibus, please follow the instructions below.
If you are using a cloud-managed service for the tracking database, you may need
to grant additional roles to your tracking database user (by default, this is
`gitlab_geo`):
- Amazon RDS requires the [`rds_superuser`](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html#Appendix.PostgreSQL.CommonDBATasks.Roles) role.
- Azure Database for PostgreSQL requires the [`azure_pg_admin`](https://docs.microsoft.com/en-us/azure/postgresql/howto-create-users#how-to-create-additional-admin-users-in-azure-database-for-postgresql) role.
If you have an external database ready to be used as the tracking database,
follow the instructions below to use it:
NOTE: **Note:**
If you want to use AWS RDS as a tracking database, make sure it has access to
the secondary database. Unfortunately, just assigning the same security group is not enough as
outbound rules do not apply to RDS PostgreSQL databases. Therefore, you need to explicitly add an inbound
rule to the read-replica's security group allowing any TCP traffic from
the tracking database on port 5432.
1. Ensure that your secondary node can communicate with your tracking database by
manually changing the `pg_hba.conf` that is associated with your tracking database.
Remember to restart PostgreSQL afterwards for the changes to take effect:
```plaintext
##
## Geo Tracking Database Role
## - pg_hba.conf
##
host all all <trusted tracking IP>/32 md5
host all all <trusted secondary IP>/32 md5
```
1. SSH into a GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` with the connection parameters and credentials for
the machine with the PostgreSQL instance:
```ruby
geo_secondary['db_username'] = 'gitlab_geo'
geo_secondary['db_password'] = '<your_password_here>'
geo_secondary['db_host'] = '<tracking_database_host>'
geo_secondary['db_port'] = <tracking_database_port> # change to the correct port
geo_postgresql['enable'] = false # don't use internal managed instance
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
1. Run the tracking database migrations:
```shell
gitlab-rake geo:db:create
gitlab-rake geo:db:migrate
```
This document was moved to [another location](../setup/external_database.md).
doc/administration/geo/replication/multiple_servers.md
View file @ f86020fa
......@@ -147,7 +147,7 @@ The following documentation assumes the database will be run on
a single node only. Multi-node PostgreSQL on **secondary** nodes is
[not currently supported](https://gitlab.com/groups/gitlab-org/-/epics/2536).
Configure the [**secondary** database](database.md) as a read-only replica of
Configure the [**secondary** database](../setup/database.md) as a read-only replica of
the **primary** database. Use the following as a guide.
1. Generate an MD5 hash of the desired password for the database user that the
......@@ -222,7 +222,7 @@ the **primary** database. Use the following as a guide.
After making these changes, [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) so the changes take effect.
If using an external PostgreSQL instance, refer also to
[Geo with external PostgreSQL instances](external_database.md).
[Geo with external PostgreSQL instances](../setup/external_database.md).
### Step 3: Configure the tracking database on the **secondary** node
......@@ -294,7 +294,7 @@ Configure the tracking database.
After making these changes, [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) so the changes take effect.
If using an external PostgreSQL instance, refer also to
[Geo with external PostgreSQL instances](external_database.md).
[Geo with external PostgreSQL instances](../setup/external_database.md).
### Step 4: Configure the frontend application servers on the **secondary** node
......
doc/administration/geo/replication/troubleshooting.md
View file @ f86020fa
......@@ -251,7 +251,7 @@ sudo gitlab-rake gitlab:geo:check
When performing a PostgreSQL major version (9 > 10) update this is expected. Follow:
- [initiate-the-replication-process](database.md#step-3-initiate-the-replication-process)
- [initiate-the-replication-process](../setup/database.md#step-3-initiate-the-replication-process)
## Fixing replication errors
......@@ -268,7 +268,7 @@ default to 1. You may need to increase this value if you have more
Be sure to restart PostgreSQL for this to take
effect. See the [PostgreSQL replication
setup](database.md#postgresql-replication) guide for more details.
setup](../setup/database.md#postgresql-replication) guide for more details.
### Message: `FATAL: could not start WAL streaming: ERROR: replication slot "geo_secondary_my_domain_com" does not exist`?
......@@ -276,11 +276,11 @@ This occurs when PostgreSQL does not have a replication slot for the
**secondary** node by that name.
You may want to rerun the [replication
process](database.md) on the **secondary** node .
process](../setup/database.md) on the **secondary** node .
### Message: "Command exceeded allowed execution time" when setting up replication?
This may happen while [initiating the replication process](database.md#step-3-initiate-the-replication-process) on the **secondary** node,
This may happen while [initiating the replication process](../setup/database.md#step-3-initiate-the-replication-process) on the **secondary** node,
and indicates that your initial dataset is too large to be replicated in the default timeout (30 minutes).
Re-run `gitlab-ctl replicate-geo-database`, but include a larger value for
......@@ -754,7 +754,7 @@ This error refers to a problem with the database replica on a **secondary** node
which Geo expects to have access to. It usually means, either:
- An unsupported replication method was used (for example, logical replication).
- The instructions to setup a [Geo database replication](database.md) were not followed correctly.
- The instructions to setup a [Geo database replication](../setup/database.md) were not followed correctly.
- Your database connection details are incorrect, that is you have specified the wrong
user in your `/etc/gitlab/gitlab.rb` file.
......@@ -774,7 +774,7 @@ The most common problems that prevent the database from replicating correctly ar
- Database replication slot is misconfigured.
- Database is not using a replication slot or another alternative and cannot catch-up because WAL files were purged.
Make sure you follow the [Geo database replication](database.md) instructions for supported configuration.
Make sure you follow the [Geo database replication](../setup/database.md) instructions for supported configuration.
### Geo database version (...) does not match latest migration (...)
......
doc/administration/geo/replication/version_specific_updates.md
View file @ f86020fa
......@@ -343,7 +343,7 @@ Support for TLS-secured PostgreSQL replication has been added. If you are
currently using PostgreSQL replication across the open internet without an
external means of securing the connection (e.g., a site-to-site VPN), then you
should immediately reconfigure your **primary** and **secondary** PostgreSQL instances
according to the [updated instructions](database.md).
according to the [updated instructions](../setup/database.md).
If you *are* securing the connections externally and wish to continue doing so,
ensure you include the new option `--sslmode=prefer` in future invocations of
......@@ -441,7 +441,7 @@ Omnibus is the following:
1. Check the steps about defining `postgresql['sql_user_password']`, `gitlab_rails['db_password']`.
1. Make sure `postgresql['max_replication_slots']` matches the number of **secondary** Geo nodes locations.
1. Install GitLab on the **secondary** server.
1. Re-run the [database replication process](database.md#step-3-initiate-the-replication-process).
1. Re-run the [database replication process](../setup/database.md#step-3-initiate-the-replication-process).
## Updating to GitLab 9.0
......
doc/administration/geo/setup/database.md 0 → 100644
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
---
# Geo database replication **(PREMIUM ONLY)**
NOTE: **Note:**
If your GitLab installation uses external (not managed by Omnibus) PostgreSQL
instances, the Omnibus roles will not be able to perform all necessary
configuration steps. In this case,
[follow the Geo with external PostgreSQL instances document instead](external_database.md).
NOTE: **Note:**
The stages of the setup process must be completed in the documented order.
Before attempting the steps in this stage, [complete all prior stages](../setup/index.md#using-omnibus-gitlab).
This document describes the minimal steps you have to take in order to
replicate your **primary** GitLab database to a **secondary** node's database. You may
have to change some values according to your database setup, how big it is, etc.
You are encouraged to first read through all the steps before executing them
in your testing/production environment.
## PostgreSQL replication
The GitLab **primary** node where the write operations happen will connect to
the **primary** database server, and **secondary** nodes will
connect to their own database servers (which are also read-only).
We recommend using [PostgreSQL replication slots](https://medium.com/@tk512/replication-slots-in-postgresql-b4b03d277c75)
to ensure that the **primary** node retains all the data necessary for the **secondary** nodes to
recover. See below for more details.
The following guide assumes that:
- You are using Omnibus and therefore you are using PostgreSQL 11 or later
which includes the [`pg_basebackup` tool](https://www.postgresql.org/docs/11/app-pgbasebackup.html).
- You have a **primary** node already set up (the GitLab server you are
replicating from), running Omnibus' PostgreSQL (or equivalent version), and
you have a new **secondary** server set up with the same versions of the OS,
PostgreSQL, and GitLab on all nodes.
CAUTION: **Warning:**
Geo works with streaming replication. Logical replication is not supported at this time.
There is an [issue where support is being discussed](https://gitlab.com/gitlab-org/gitlab/-/issues/7420).
### Step 1. Configure the **primary** server
1. SSH into your GitLab **primary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** name for your node:
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
1. GitLab 10.4 and up only: Do the following to make sure the `gitlab` database user has a password defined:
NOTE: **Note:**
Until FDW settings are removed in GitLab version 14.0, avoid using single or double quotes in the
password for PostgreSQL as that will lead to errors when reconfiguring.
Generate a MD5 hash of the desired password:
```shell
gitlab-ctl pg-password-md5 gitlab
# Enter password: <your_password_here>
# Confirm password: <your_password_here>
# fca0b89a972d69f00eb3ec98a5838484
```
Edit `/etc/gitlab/gitlab.rb`:
```ruby
# Fill with the hash generated by `gitlab-ctl pg-password-md5 gitlab`
postgresql['sql_user_password'] = '<md5_hash_of_your_password>'
# Every node that runs Puma or Sidekiq needs to have the database
# password specified as below. If you have a high-availability setup, this
# must be present in all application nodes.
gitlab_rails['db_password'] = '<your_password_here>'
```
1. Omnibus GitLab already has a [replication user](https://wiki.postgresql.org/wiki/Streaming_Replication)
called `gitlab_replicator`. You must set the password for this user manually.
You will be prompted to enter a password:
```shell
gitlab-ctl set-replication-password
```
This command will also read the `postgresql['sql_replication_user']` Omnibus
setting in case you have changed `gitlab_replicator` username to something
else.
If you are using an external database not managed by Omnibus GitLab, you need
to create the replicator user and define a password to it manually:
```sql
--- Create a new user 'replicator'
CREATE USER gitlab_replicator;
--- Set/change a password and grants replication privilege
ALTER USER gitlab_replicator WITH REPLICATION ENCRYPTED PASSWORD '<replication_password>';
```
1. Configure PostgreSQL to listen on network interfaces:
For security reasons, PostgreSQL does not listen on any network interfaces
by default. However, Geo requires the **secondary** node to be able to
connect to the **primary** node's database. For this reason, we need the address of
each node.
NOTE: **Note:**
For external PostgreSQL instances, see [additional instructions](external_database.md).
If you are using a cloud provider, you can lookup the addresses for each
Geo node through your cloud provider's management console.
To lookup the address of a Geo node, SSH in to the Geo node and execute:
```shell
##
## Private address
##
ip route get 255.255.255.255 | awk '{print "Private address:", $NF; exit}'
##
## Public address
##
echo "External address: $(curl --silent ipinfo.io/ip)"
```
In most cases, the following addresses will be used to configure GitLab
Geo:
| Configuration | Address |
|:----------------------------------------|:------------------------------------------------------|
| `postgresql['listen_address']` | **Primary** node's public or VPC private address. |
| `postgresql['md5_auth_cidr_addresses']` | **Secondary** node's public or VPC private addresses. |
If you are using Google Cloud Platform, SoftLayer, or any other vendor that
provides a virtual private cloud (VPC) you can use the **primary** and **secondary** nodes
private addresses (corresponds to "internal address" for Google Cloud Platform) for
`postgresql['md5_auth_cidr_addresses']` and `postgresql['listen_address']`.
The `listen_address` option opens PostgreSQL up to network connections with the interface
corresponding to the given address. See [the PostgreSQL documentation](https://www.postgresql.org/docs/11/runtime-config-connection.html)
for more details.
NOTE: **Note:**
If you need to use `0.0.0.0` or `*` as the listen_address, you will also need to add
`127.0.0.1/32` to the `postgresql['md5_auth_cidr_addresses']` setting, to allow Rails to connect through
`127.0.0.1`. For more information, see [omnibus-5258](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5258).
Depending on your network configuration, the suggested addresses may not
be correct. If your **primary** node and **secondary** nodes connect over a local
area network, or a virtual network connecting availability zones like
[Amazon's VPC](https://aws.amazon.com/vpc/) or [Google's VPC](https://cloud.google.com/vpc/)
you should use the **secondary** node's private address for `postgresql['md5_auth_cidr_addresses']`.
Edit `/etc/gitlab/gitlab.rb` and add the following, replacing the IP
addresses with addresses appropriate to your network configuration:
```ruby
##
## Geo Primary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_primary_role']
##
## Primary address
## - replace '<primary_node_ip>' with the public or VPC address of your Geo primary node
##
postgresql['listen_address'] = '<primary_node_ip>'
##
# Allow PostgreSQL client authentication from the primary and secondary IPs. These IPs may be
# public or VPC addresses in CIDR format, for example ['198.51.100.1/32', '198.51.100.2/32']
##
postgresql['md5_auth_cidr_addresses'] = ['<primary_node_ip>/32', '<secondary_node_ip>/32']
##
## Replication settings
## - set this to be the number of Geo secondary nodes you have
##
postgresql['max_replication_slots'] = 1
# postgresql['max_wal_senders'] = 10
# postgresql['wal_keep_segments'] = 10
##
## Disable automatic database migrations temporarily
## (until PostgreSQL is restarted and listening on the private address).
##
gitlab_rails['auto_migrate'] = false
```
1. Optional: If you want to add another **secondary** node, the relevant setting would look like:
```ruby
postgresql['md5_auth_cidr_addresses'] = ['<primary_node_ip>/32', '<secondary_node_ip>/32', '<another_secondary_node_ip>/32']
```
You may also want to edit the `wal_keep_segments` and `max_wal_senders` to match your
database replication requirements. Consult the [PostgreSQL - Replication documentation](https://www.postgresql.org/docs/11/runtime-config-replication.html)
for more information.
1. Save the file and reconfigure GitLab for the database listen changes and
the replication slot changes to be applied:
```shell
gitlab-ctl reconfigure
```
Restart PostgreSQL for its changes to take effect:
```shell
gitlab-ctl restart postgresql
```
1. Re-enable migrations now that PostgreSQL is restarted and listening on the
private address.
Edit `/etc/gitlab/gitlab.rb` and **change** the configuration to `true`:
```ruby
gitlab_rails['auto_migrate'] = true
```
Save the file and reconfigure GitLab:
```shell
gitlab-ctl reconfigure
```
1. Now that the PostgreSQL server is set up to accept remote connections, run
`netstat -plnt | grep 5432` to make sure that PostgreSQL is listening on port
`5432` to the **primary** server's private address.
1. A certificate was automatically generated when GitLab was reconfigured. This
will be used automatically to protect your PostgreSQL traffic from
eavesdroppers, but to protect against active ("man-in-the-middle") attackers,
the **secondary** node needs a copy of the certificate. Make a copy of the PostgreSQL
`server.crt` file on the **primary** node by running this command:
```shell
cat ~gitlab-psql/data/server.crt
```
Copy the output into a clipboard or into a local file. You
will need it when setting up the **secondary** node! The certificate is not sensitive
data.
### Step 2. Configure the **secondary** server
1. SSH into your GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Stop application server and Sidekiq
```shell
gitlab-ctl stop puma
gitlab-ctl stop sidekiq
```
NOTE: **Note:**
This step is important so we don't try to execute anything before the node is fully configured.
1. [Check TCP connectivity](../../raketasks/maintenance.md) to the **primary** node's PostgreSQL server:
```shell
gitlab-rake gitlab:tcp_check[<primary_node_ip>,5432]
```
NOTE: **Note:**
If this step fails, you may be using the wrong IP address, or a firewall may
be preventing access to the server. Check the IP address, paying close
attention to the difference between public and private addresses and ensure
that, if a firewall is present, the **secondary** node is permitted to connect to the
**primary** node on port 5432.
1. Create a file `server.crt` in the **secondary** server, with the content you got on the last step of the **primary** node's setup:
```shell
editor server.crt
```
1. Set up PostgreSQL TLS verification on the **secondary** node:
Install the `server.crt` file:
```shell
install \
-D \
-o gitlab-psql \
-g gitlab-psql \
-m 0400 \
-T server.crt ~gitlab-psql/.postgresql/root.crt
```
PostgreSQL will now only recognize that exact certificate when verifying TLS
connections. The certificate can only be replicated by someone with access
to the private key, which is **only** present on the **primary** node.
1. Test that the `gitlab-psql` user can connect to the **primary** node's database
(the default Omnibus database name is `gitlabhq_production`):
```shell
sudo \
-u gitlab-psql /opt/gitlab/embedded/bin/psql \
--list \
-U gitlab_replicator \
-d "dbname=gitlabhq_production sslmode=verify-ca" \
-W \
-h <primary_node_ip>
```
When prompted enter the password you set in the first step for the
`gitlab_replicator` user. If all worked correctly, you should see
the list of **primary** node's databases.
A failure to connect here indicates that the TLS configuration is incorrect.
Ensure that the contents of `~gitlab-psql/data/server.crt` on the **primary** node
match the contents of `~gitlab-psql/.postgresql/root.crt` on the **secondary** node.
1. Configure PostgreSQL:
This step is similar to how we configured the **primary** instance.
We need to enable this, even if using a single node.
Edit `/etc/gitlab/gitlab.rb` and add the following, replacing the IP
addresses with addresses appropriate to your network configuration:
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
##
## Secondary address
## - replace '<secondary_node_ip>' with the public or VPC address of your Geo secondary node
##
postgresql['listen_address'] = '<secondary_node_ip>'
postgresql['md5_auth_cidr_addresses'] = ['<secondary_node_ip>/32']
##
## Database credentials password (defined previously in primary node)
## - replicate same values here as defined in primary node
##
postgresql['sql_user_password'] = '<md5_hash_of_your_password>'
gitlab_rails['db_password'] = '<your_password_here>'
```
For external PostgreSQL instances, see [additional instructions](external_database.md).
If you bring a former **primary** node back online to serve as a **secondary** node, then you also need to remove `roles ['geo_primary_role']` or `geo_primary_role['enable'] = true`.
1. Reconfigure GitLab for the changes to take effect:
```shell
gitlab-ctl reconfigure
```
1. Restart PostgreSQL for the IP change to take effect:
```shell
gitlab-ctl restart postgresql
```
### Step 3. Initiate the replication process
Below we provide a script that connects the database on the **secondary** node to
the database on the **primary** node, replicates the database, and creates the
needed files for streaming replication.
The directories used are the defaults that are set up in Omnibus. If you have
changed any defaults, configure it as you see fit replacing the directories and paths.
CAUTION: **Warning:**
Make sure to run this on the **secondary** server as it removes all PostgreSQL's
data before running `pg_basebackup`.
1. SSH into your GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Choose a database-friendly name to use for your **secondary** node to
use as the replication slot name. For example, if your domain is
`secondary.geo.example.com`, you may use `secondary_example` as the slot
name as shown in the commands below.
1. Execute the command below to start a backup/restore and begin the replication
CAUTION: **Warning:**
Each Geo **secondary** node must have its own unique replication slot name.
Using the same slot name between two secondaries will break PostgreSQL replication.
```shell
gitlab-ctl replicate-geo-database \
--slot-name=<secondary_node_name> \
--host=<primary_node_ip>
```
NOTE: **Note:**
Replication slot names must only contain lowercase letters, numbers, and the underscore character.
When prompted, enter the _plaintext_ password you set up for the `gitlab_replicator`
user in the first step.
This command also takes a number of additional options. You can use `--help`
to list them all, but here are a couple of tips:
- If PostgreSQL is listening on a non-standard port, add `--port=` as well.
- If your database is too large to be transferred in 30 minutes, you will need
to increase the timeout, e.g., `--backup-timeout=3600` if you expect the
initial replication to take under an hour.
- Pass `--sslmode=disable` to skip PostgreSQL TLS authentication altogether
(e.g., you know the network path is secure, or you are using a site-to-site
VPN). This is **not** safe over the public Internet!
- You can read more details about each `sslmode` in the
[PostgreSQL documentation](https://www.postgresql.org/docs/11/libpq-ssl.html#LIBPQ-SSL-PROTECTION);
the instructions above are carefully written to ensure protection against
both passive eavesdroppers and active "man-in-the-middle" attackers.
- Change the `--slot-name` to the name of the replication slot
to be used on the **primary** database. The script will attempt to create the
replication slot automatically if it does not exist.
- If you're repurposing an old server into a Geo **secondary** node, you'll need to
add `--force` to the command line.
- When not in a production machine you can disable backup step if you
really sure this is what you want by adding `--skip-backup`
The replication process is now complete.
## PgBouncer support (optional)
[PgBouncer](https://www.pgbouncer.org/) may be used with GitLab Geo to pool
PostgreSQL connections. We recommend using PgBouncer if you use GitLab in a
high-availability configuration with a cluster of nodes supporting a Geo
**primary** node and another cluster of nodes supporting a Geo **secondary** node. For more
information, see [High Availability with Omnibus GitLab](../../postgresql/replication_and_failover.md).
## Troubleshooting
Read the [troubleshooting document](../replication/troubleshooting.md).
doc/administration/geo/setup/external_database.md 0 → 100644
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
---
# Geo with external PostgreSQL instances **(PREMIUM ONLY)**
This document is relevant if you are using a PostgreSQL instance that is *not
managed by Omnibus*. This includes cloud-managed instances like AWS RDS, or
manually installed and configured PostgreSQL instances.
NOTE: **Note:**
We strongly recommend running Omnibus-managed instances as they are actively
developed and tested. We aim to be compatible with most external
(not managed by Omnibus) databases but we do not guarantee compatibility.
## **Primary** node
1. SSH into a GitLab **primary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** ID for your node (arbitrary value):
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
### Configure the external database to be replicated
To set up an external database, you can either:
- Set up streaming replication yourself (for example, in AWS RDS).
- Perform the Omnibus configuration manually as follows.
#### Leverage your cloud provider's tools to replicate the primary database
Given you have a primary node set up on AWS EC2 that uses RDS.
You can now just create a read-only replica in a different region and the
replication process will be managed by AWS. Make sure you've set Network ACL, Subnet, and
Security Group according to your needs, so the secondary application node can access the database.
The following instructions detail how to create a read-only replica for common
cloud providers:
- Amazon RDS - [Creating a Read Replica](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html#USER_ReadRepl.Create)
- Azure Database for PostgreSQL - [Create and manage read replicas in Azure Database for PostgreSQL](https://docs.microsoft.com/en-us/azure/postgresql/howto-read-replicas-portal)
Once your read-only replica is set up, you can skip to [configure you secondary application node](#configure-secondary-application-nodes-to-use-the-external-read-replica).
#### Manually configure the primary database for replication
The [`geo_primary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
configures the **primary** node's database to be replicated by making changes to
`pg_hba.conf` and `postgresql.conf`. Make the following configuration changes
manually to your external database configuration and ensure that you restart PostgreSQL
afterwards for the changes to take effect:
```plaintext
##
## Geo Primary Role
## - pg_hba.conf
##
host all all <trusted primary IP>/32 md5
host replication gitlab_replicator <trusted primary IP>/32 md5
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
```
```plaintext
##
## Geo Primary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 50
max_replication_slots = 1 # number of secondary instances
hot_standby = on
```
## **Secondary** nodes
### Manually configure the replica database
Make the following configuration changes manually to your `pg_hba.conf` and `postgresql.conf`
of your external replica database and ensure that you restart PostgreSQL afterwards
for the changes to take effect:
```plaintext
##
## Geo Secondary Role
## - pg_hba.conf
##
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
host all all <trusted primary IP>/24 md5
```
```plaintext
##
## Geo Secondary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 10
hot_standby = on
```
### Configure **secondary** application nodes to use the external read-replica
With Omnibus, the
[`geo_secondary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
has three main functions:
1. Configure the replica database.
1. Configure the tracking database.
1. Enable the [Geo Log Cursor](../index.md#geo-log-cursor) (not covered in this section).
To configure the connection to the external read-replica database and enable Log Cursor:
1. SSH into a GitLab **secondary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add the following
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
# note this is shared between both databases,
# make sure you define the same password in both
gitlab_rails['db_password'] = '<your_password_here>'
gitlab_rails['db_username'] = 'gitlab'
gitlab_rails['db_host'] = '<database_read_replica_host>'
# Disable the bundled Omnibus PostgreSQL, since we are
# using an external PostgreSQL
postgresql['enable'] = false
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
### Configure the tracking database
**Secondary** nodes use a separate PostgreSQL installation as a tracking
database to keep track of replication status and automatically recover from
potential replication issues. Omnibus automatically configures a tracking database
when `roles ['geo_secondary_role']` is set.
If you want to run this database external to Omnibus, please follow the instructions below.
If you are using a cloud-managed service for the tracking database, you may need
to grant additional roles to your tracking database user (by default, this is
`gitlab_geo`):
- Amazon RDS requires the [`rds_superuser`](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html#Appendix.PostgreSQL.CommonDBATasks.Roles) role.
- Azure Database for PostgreSQL requires the [`azure_pg_admin`](https://docs.microsoft.com/en-us/azure/postgresql/howto-create-users#how-to-create-additional-admin-users-in-azure-database-for-postgresql) role.
If you have an external database ready to be used as the tracking database,
follow the instructions below to use it:
NOTE: **Note:**
If you want to use AWS RDS as a tracking database, make sure it has access to
the secondary database. Unfortunately, just assigning the same security group is not enough as
outbound rules do not apply to RDS PostgreSQL databases. Therefore, you need to explicitly add an inbound
rule to the read-replica's security group allowing any TCP traffic from
the tracking database on port 5432.
1. Ensure that your secondary node can communicate with your tracking database by
manually changing the `pg_hba.conf` that is associated with your tracking database.
Remember to restart PostgreSQL afterwards for the changes to take effect:
```plaintext
##
## Geo Tracking Database Role
## - pg_hba.conf
##
host all all <trusted tracking IP>/32 md5
host all all <trusted secondary IP>/32 md5
```
1. SSH into a GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` with the connection parameters and credentials for
the machine with the PostgreSQL instance:
```ruby
geo_secondary['db_username'] = 'gitlab_geo'
geo_secondary['db_password'] = '<your_password_here>'
geo_secondary['db_host'] = '<tracking_database_host>'
geo_secondary['db_port'] = <tracking_database_port> # change to the correct port
geo_postgresql['enable'] = false # don't use internal managed instance
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
1. Run the tracking database migrations:
```shell
gitlab-rake geo:db:create
gitlab-rake geo:db:migrate
```
doc/administration/geo/setup/index.md
View file @ f86020fa
......@@ -21,7 +21,7 @@ If you installed GitLab using the Omnibus packages (highly recommended):
1. [Install GitLab Enterprise Edition](https://about.gitlab.com/install/) on the server that will serve as the **secondary** node. Do not create an account or log in to the new **secondary** node.
1. [Upload the GitLab License](../../../user/admin_area/license.md) on the **primary** node to unlock Geo. The license must be for [GitLab Premium](https://about.gitlab.com/pricing/) or higher.
1. [Set up the database replication](../replication/database.md) (`primary (read-write) <-> secondary (read-only)` topology).
1. [Set up the database replication](database.md) (`primary (read-write) <-> secondary (read-only)` topology).
1. [Configure fast lookup of authorized SSH keys in the database](../../operations/fast_ssh_key_lookup.md). This step is required and needs to be done on **both** the **primary** and **secondary** nodes.
1. [Configure GitLab](../replication/configuration.md) to set the **primary** and **secondary** nodes.
1. Optional: [Configure a secondary LDAP server](../../auth/ldap/index.md) for the **secondary** node. See [notes on LDAP](../index.md#ldap).
......
doc/administration/troubleshooting/postgresql.md
View file @ f86020fa
......@@ -34,7 +34,7 @@ This section is for links to information elsewhere in the GitLab documentation.
- [More about external PostgreSQL](../postgresql/external.md)
- [Running Geo with external PostgreSQL](../geo/replication/external_database.md)
- [Running Geo with external PostgreSQL](../geo/setup/external_database.md)
- [Upgrades when running PostgreSQL configured for HA.](https://docs.gitlab.com/omnibus/settings/database.html#upgrading-a-gitlab-ha-cluster)
......
doc/gitlab-geo/database.md
View file @ f86020fa
---
redirect_to: '../administration/geo/replication/database.md'
redirect_to: '../administration/geo/setup/database.md'
---
This document was moved to [another location](../administration/geo/replication/database.md).
This document was moved to [another location](../administration/geo/setup/database.md).
doc/gitlab-geo/database_source.md
View file @ f86020fa
---
redirect_to: '../administration/geo/replication/database.md'
redirect_to: '../administration/geo/setup/database.md'
---
This document was moved to [another location](../administration/geo/replication/database.md).
This document was moved to [another location](../administration/geo/setup/database.md).
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