playbook/*ridge*: Add a playbook "ridge".

Goal: Fill a reference database in Wendelin for the OCEAN project.
How: Deploy a script in a Test Suite that scans and upload the desired parts of a KVM filesystem. This is a playbook for the deployment script.

Files: playbook/ridge.yml, playbook/roles/ridge/*

See merge request !163

playbook/ridge.yml

+# See roles/ridge/README.md for some context.
+
+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  roles:
+    - ridge

playbook/roles/ridge/README.md

+The Ridge play is part of the OCEAN project. It deploys a script that uploads a scan of the desired directories of a KVM in order to fill a reference database in OCEAN's Wendelin instance. See the OCEAN documentation for more details.
+

playbook/roles/ridge/meta/main.yml

+---
+dependencies:
+  - { role: package, package_name: dep--fluent-bit, package_state: latest }
+  - { role: package, package_name: dep--mca--static, package_state: latest }
+
+  # this are not actual dependencies, it is just an experimental list of packages to scan
+  - { role: package, package_name: dracut-core, package_state: latest }
+  - { role: package, package_name: dracut, package_state: latest }
+  - { role: package, package_name: dracut-network, package_state: latest }
+  - { role: package, package_name: python3, package_state: latest }

playbook/roles/ridge/tasks/main.yml

+  - name: Create configuration from template
+    shell: "sed '{{conf_regex}}' {{mca_path}}/etc/flb.conf.in > {{mca_path}}/etc/flb.conf"
+
+  - name: Scan directory
+    shell: "{{binary}} /sbin {{flb}} {{flb_plugin}} {{flb_conf}} {{log}}"
+    shell: "{{binary}} /bin {{flb}} {{flb_plugin}} {{flb_conf}} {{log}}"
+
+  - name: Indicate success in the logs
+    shell: "echo -e \"{{sucess_string}}\""

playbook/roles/ridge/vars/main.yml

+## PACKAGES
+mca_name_and_version: dep--mca--static_1-1
+fluentbit_name_and_version: dep--fluent-bit_1-1
+mca_path: /opt/{{mca_name_and_version}}
+flb_path: /opt/{{fluentbit_name_and_version}}
+
+## WENDELIN CONFIGURATION
+wendelin_url: "{{ lookup('env', 'ANSIBLE_wendelin_url') }}"
+# the deployment is still a WIP but a solution has to be found not to display the password of the production Wendelin instance
+wendelin_pwd: "{{ lookup('env', 'ANSIBLE_wendelin_pwd') }}"
+wendelin_reference: "{{ lookup('env', 'ANSIBLE_wendelin_reference') }}"
+
+## OTHER
+conf_regex: s|%WENDELIN_URL%|{{wendelin_url}}|g;s|%WENDELIN_PWD%|{{wendelin_pwd}}|g;s|%WENDELIN_REFERENCE%|{{wendelin_reference}}|g
+
+binary: "{{mca_path}}/bin/metadata-collect-agent"
+flb: "{{flb_path}}/bin/fluent-bit"
+flb_plugin: "{{mca_path}}/lib/libfluentbit_wendelin.so"
+flb_conf: "{{mca_path}}/etc/flb.conf"
+log: /var/log/metadata_collect.log
+
+sucess_string: "\n(success string:) Build successful, connect to:\n"