Commit 8ec618a6 authored by Alessio Caiazza's avatar Alessio Caiazza

Add Helm InstallCommand

parent 760a154a
......@@ -26,6 +26,10 @@ module Clusters
def name
self.class.application_name
end
def install_command
Gitlab::Kubernetes::Helm::InstallCommand.new(name, true)
end
end
end
end
......@@ -20,6 +20,10 @@ module Clusters
def helm_api
@helm_api ||= Gitlab::Kubernetes::Helm.new(kubeclient)
end
def install_command
@install_command ||= app.install_command
end
end
end
end
......@@ -48,17 +48,17 @@ module Clusters
end
def remove_installation_pod
helm_api.delete_installation_pod!(app)
helm_api.delete_installation_pod!(install_command.pod_name)
rescue
# no-op
end
def installation_phase
helm_api.installation_status(app)
helm_api.installation_status(install_command.pod_name)
end
def installation_errors
helm_api.installation_log(app)
helm_api.installation_log(install_command.pod_name)
end
end
end
......
......@@ -6,7 +6,7 @@ module Clusters
begin
app.make_installing!
helm_api.install(app)
helm_api.install(install_command)
ClusterWaitForAppInstallationWorker.perform_in(
ClusterWaitForAppInstallationWorker::INTERVAL, app.name, app.id)
......
......@@ -3,27 +3,27 @@ module Gitlab
class Helm
HELM_VERSION = '2.7.0'.freeze
NAMESPACE = 'gitlab-managed-apps'.freeze
COMMAND_SCRIPT = <<-EOS.freeze
INSTALL_DEPS = <<-EOS.freeze
set -eo pipefail
apk add -U ca-certificates openssl >/dev/null
wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
mv /tmp/linux-amd64/helm /usr/bin/
helm init ${HELM_INIT_OPTS} >/dev/null
[[ -z "${HELM_COMMAND+x}" ]] || helm ${HELM_COMMAND} >/dev/null
EOS
InstallCommand = Struct.new(:name, :install_helm, :chart) do
def pod_name
"install-#{name}"
end
end
def initialize(kubeclient)
@kubeclient = kubeclient
@namespace = Namespace.new(NAMESPACE, kubeclient)
end
def init!
install(OpenStruct.new(name: 'helm'))
end
def install(app)
def install(command)
@namespace.ensure_exists!
@kubeclient.create_pod(pod_resource(app))
@kubeclient.create_pod(pod_resource(command))
end
##
......@@ -33,31 +33,27 @@ module Gitlab
#
# values: "Pending", "Running", "Succeeded", "Failed", "Unknown"
#
def installation_status(app)
@kubeclient.get_pod(pod_name(app), @namespace.name).status.phase
def installation_status(pod_name)
@kubeclient.get_pod(pod_name, @namespace.name).status.phase
end
def installation_log(app)
@kubeclient.get_pod_log(pod_name(app), @namespace.name).body
def installation_log(pod_name)
@kubeclient.get_pod_log(pod_name, @namespace.name).body
end
def delete_installation_pod!(app)
@kubeclient.delete_pod(pod_name(app), @namespace.name)
def delete_installation_pod!(pod_name)
@kubeclient.delete_pod(pod_name, @namespace.name)
end
private
def pod_name(app)
"install-#{app.name}"
end
def pod_resource(app)
labels = { 'gitlab.org/action': 'install', 'gitlab.org/application': app.name }
metadata = { name: pod_name(app), namespace: @namespace.name, labels: labels }
def pod_resource(command)
labels = { 'gitlab.org/action': 'install', 'gitlab.org/application': command.name }
metadata = { name: command.pod_name, namespace: @namespace.name, labels: labels }
container = {
name: 'helm',
image: 'alpine:3.6',
env: generate_pod_env(app),
env: generate_pod_env(command),
command: %w(/bin/sh),
args: %w(-c $(COMMAND_SCRIPT))
}
......@@ -66,23 +62,34 @@ module Gitlab
::Kubeclient::Resource.new(metadata: metadata, spec: spec)
end
def generate_pod_env(app)
env = {
def generate_pod_env(command)
{
HELM_VERSION: HELM_VERSION,
TILLER_NAMESPACE: NAMESPACE,
COMMAND_SCRIPT: COMMAND_SCRIPT
}
TILLER_NAMESPACE: @namespace.name,
COMMAND_SCRIPT: generate_script(command)
}.map { |key, value| { name: key, value: value } }
end
if app.name != 'helm'
env[:HELM_INIT_OPTS] = '--client-only'
env[:HELM_COMMAND] = helm_install_comand(app)
def generate_script(command)
[
INSTALL_DEPS,
helm_init_command(command),
helm_install_command(command)
].join("\n")
end
env.map { |key, value| { name: key, value: value } }
def helm_init_command(command)
if command.install_helm
'helm init >/dev/null'
else
'helm init --client-only >/dev/null'
end
end
def helm_install_command(command)
return if command.chart.nil?
def helm_install_comand(app)
"install #{app.chart} --name #{app.name} --namespace #{NAMESPACE}"
"helm install #{command.chart} --name #{command.name} --namespace #{@namespace.name} >/dev/null"
end
end
end
......
require 'spec_helper'
describe Gitlab::Kubernetes::Helm do
let(:client) { double('kubernetes client') }
let(:helm) { described_class.new(client) }
let(:namespace) { Gitlab::Kubernetes::Namespace.new(described_class::NAMESPACE, client) }
let(:install_helm) { true }
let(:chart) { 'stable/a_chart' }
let(:application_name) { 'app_name' }
let(:command) { Gitlab::Kubernetes::Helm::InstallCommand.new(application_name, install_helm, chart) }
subject { helm }
before do
allow(Gitlab::Kubernetes::Namespace).to receive(:new).with(described_class::NAMESPACE, client).and_return(namespace)
end
describe '#initialize' do
it 'creates a namespace object' do
expect(Gitlab::Kubernetes::Namespace).to receive(:new).with(described_class::NAMESPACE, client)
subject
end
end
describe '#install' do
before do
allow(client).to receive(:create_pod).and_return(nil)
allow(namespace).to receive(:ensure_exists!).once
end
it 'ensures the namespace exists before creating the POD' do
expect(namespace).to receive(:ensure_exists!).once.ordered
expect(client).to receive(:create_pod).once.ordered
subject.install(command)
end
end
describe '#installation_status' do
let(:phase) { Gitlab::Kubernetes::Pod::RUNNING }
let(:pod) { Kubeclient::Resource.new(status: { phase: phase }) } # partial representation
it 'fetches POD phase from kubernetes cluster' do
expect(client).to receive(:get_pod).with(command.pod_name, described_class::NAMESPACE).once.and_return(pod)
expect(subject.installation_status(command.pod_name)).to eq(phase)
end
end
describe '#installation_log' do
let(:log) { 'some output' }
let(:response) { RestClient::Response.new(log) }
it 'fetches POD phase from kubernetes cluster' do
expect(client).to receive(:get_pod_log).with(command.pod_name, described_class::NAMESPACE).once.and_return(response)
expect(subject.installation_log(command.pod_name)).to eq(log)
end
end
describe '#delete_installation_pod!' do
it 'deletes the POD from kubernetes cluster' do
expect(client).to receive(:delete_pod).with(command.pod_name, described_class::NAMESPACE).once
subject.delete_installation_pod!(command.pod_name)
end
end
describe '#helm_init_command' do
subject { helm.send(:helm_init_command, command) }
context 'when command.install_helm is true' do
let(:install_helm) { true }
it { is_expected.to eq('helm init >/dev/null') }
end
context 'when command.install_helm is false' do
let(:install_helm) { false }
it { is_expected.to eq('helm init --client-only >/dev/null') }
end
end
describe '#helm_install_command' do
subject { helm.send(:helm_install_command, command) }
context 'when command.chart is nil' do
let(:chart) { nil }
it { is_expected.to be_nil }
end
context 'when command.chart is set' do
let(:chart) { 'stable/a_chart' }
it { is_expected.to eq("helm install #{chart} --name #{application_name} --namespace #{namespace.name} >/dev/null")}
end
end
end
......@@ -38,6 +38,12 @@ describe Clusters::Applications::Helm do
end
end
describe '#install_command' do
it 'has all the needed information' do
expect(subject.install_command).to have_attributes(name: subject.name, install_helm: true, chart: nil)
end
end
describe 'status state machine' do
describe '#make_installing' do
subject { create(:cluster_applications_helm, :scheduled) }
......
......@@ -12,7 +12,7 @@ describe Clusters::Applications::InstallService do
context 'when there are no errors' do
before do
expect(helm_client).to receive(:install).with(application)
expect(helm_client).to receive(:install).with(application.install_command)
allow(ClusterWaitForAppInstallationWorker).to receive(:perform_in).and_return(nil)
end
......@@ -33,7 +33,7 @@ describe Clusters::Applications::InstallService do
context 'when k8s cluster communication fails' do
before do
error = KubeException.new(500, 'system failure', nil)
expect(helm_client).to receive(:install).with(application).and_raise(error)
expect(helm_client).to receive(:install).with(application.install_command).and_raise(error)
end
it 'make the application errored' do
......
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