Cronjob automation

Signed-off-by: Swapnil Bobade <[email protected]>

README.md

@@ -36,6 +36,7 @@ This repository consists of additional ansible playbooks for the following:
 1. Configure and run verification-tests
 1. Enabling Stream Control Transmission Protocol (SCTP) and run e2e
 1. Deploy Kubernetes NMState Operator and run e2e
+1. Cronjob automation
 
 ## Assumptions:
 

examples/all.yaml

@@ -259,6 +259,15 @@ fio_git_token: ""
 fio_git_branch: ""
 fio_cleanup: true
 
+#cron-job vars
+enable_cronjob: false  # Set true to enable the cronjob
+cronjob_schedule: "* * * * *"
+cronjob_concurrencyPolicy: "Allow"
+cronjob_startingDeadlineSeconds:
+cronjob_suspend:      
+cronjob_successfulJobsHistoryLimit:
+cronjob_failedJobsHistoryLimit:
+
 #ocp-verification-tests vars
 verification_enabled: false
 verification_dir: "/root/verification-tests"

playbooks/main.yml

@@ -86,6 +86,9 @@
 - import_playbook: request-header-identity-provider.yml
   when: request_header_provider is defined and request_header_provider
 
+- import_playbook: ocp-cronjob.yml
+  when: enable_cronjob is defined and enable_cronjob
+
 - import_playbook: ocp-descheduler.yml
   when: descheduler_role_enable is defined and descheduler_role_enable
 

playbooks/ocp-cronjob.yml

@@ -0,0 +1,5 @@
+---
+- name: Start cronjob
+  hosts: bastion
+  roles:
+  - ocp-cronjob

playbooks/roles/ocp-cronjob/README.md

@@ -0,0 +1,66 @@
+OCP Cronjob creation
+=======================================
+
+The role *"roles/ocp-cronjob"* provides automated creation of cronjobs. User can add cronjob value in the role variables for creation **Role Variables** section.
+This role will create the cronjob and we can monitor the jobs usig oc commands
+
+
+Requirements
+------------
+
+ - Running OCP 4.x cluster.
+
+
+Role Variables
+--------------
+
+| Variable                            | Required | Default                   |Comments                                                                                                                         | 
+|-------------------------------------|----------|---------------------------|---------------------------------------------------------------------------------------------------------------------------------|
+| enable_cronjob        		      | no       | false                     | Flag to be set to true to enable cronjob |   
+| cronjob_schedule        		  	  | no       | * * * * *                 | schedule field for the job is specified in cron format. Here, the job run every minute |                    
+| cronjob_concurrencyPolicy           | no       | Allow              		 | specifies how the job controller treats concurrent jobs within a cron job, values can be - ["Allow","forbid","replace"]     |
+| cronjob_startingDeadlineSeconds     | no       | 200              		 | starting deadline specifies a deadline (in seconds) for starting the job    |
+| cronjob_suspend             		  | no       | false              		 | prevent subsequent runs of the cron job |
+| cronjob_successfulJobsHistoryLimit  | no       | 3              			 | store the successful jobs history limit     |
+| cronjob_failedJobsHistoryLimit      | no       | 2             			 | store the failed jobs history limit    |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+
+
+Dependencies
+------------
+
+ - None
+
+
+Example Playbook
+----------------
+
+    - name: Start cronjob
+      hosts: bastion
+      roles:
+        - ocp-cronjob
+
+
+Steps to run playbook
+----------------------
+
+ - Copy the ocp4-playbooks-extras/examples/inventory to the home/working directory
+ - To execute the playbook run the below sample command
+
+
+Sample Command
+---------------
+
+ansible-playbook -i inventory -e @examples/all.yaml ~/ocp4-playbooks-extras/playbooks/ocp-cronjob.yml
+
+
+License
+-------
+
+See LICENCE.txt
+
+
+Author Information
+------------------
+
+Swapnil Bobade ([email protected])

playbooks/roles/ocp-cronjob/defaults/main.yml

@@ -0,0 +1,15 @@
+---
+# defaults file for playbooks/roles/ocp-cronjob
+# all these values can be updated as needed
+container_name: "busybox"
+container_image: "busybox" 
+cronjob_namespace: "openshift-cronjob"
+delete_cronjob: false
+job_name: "cronjob"
+enable_cronjob: false
+cronjob_schedule: "*/1 * * * *"
+cronjob_concurrencyPolicy: "Allow"
+cronjob_startingDeadlineSeconds: 200
+cronjob_suspend: false      
+cronjob_successfulJobsHistoryLimit: 4
+cronjob_failedJobsHistoryLimit: 2

playbooks/roles/ocp-cronjob/tasks/main.yml

@@ -0,0 +1,70 @@
+---
+# Creating namespace for cronjob
+- name: Create namespace for cronjob
+  k8s:
+    state: present
+    definition:
+      apiVersion: v1
+      kind: Namespace
+      metadata:
+        name: "{{ cronjob_namespace }}"
+
+# create cronjobs
+- name: Create Cronjobs
+  block: 
+  - name: Create Cronjob
+    template:
+      src: "{{ role_path }}/templates/cron-job.yml.j2"
+      dest: "{{ role_path }}/files/cronjob.yml"
+
+  - name: Apply the cronjob
+    shell: oc apply -f "{{ role_path }}/files/cronjob.yml"
+
+  - name: Check if pods are created
+    shell: oc get pods -n {{ cronjob_namespace }} --no-headers | wc -l
+    register: pod_count
+    until: pod_count.stdout|int > 0
+    retries: 3
+    delay: 30
+
+  - name: Check pod status
+    shell: oc wait -l parent=cronjobpi --for=condition=Ready pods
+    register: pod_status
+
+  - debug:
+      msg: "{{ pod_status.stdout_lines }}"
+
+  - name: Check if jobs are getting created
+    shell: oc get jobs -n {{ cronjob_namespace }} --no-headers | wc -l
+    register: job_count
+    until: job_count.stdout|int > 0
+    retries: 3
+    delay: 30
+
+  - name: Check if jobs are running
+    shell: oc get jobs -n {{ cronjob_namespace }}
+    register: output_jobs
+
+  - name: Check if pods are running
+    shell: oc get pods -n {{ cronjob_namespace }} | grep "Completed\|Running"
+    register: output_pods
+
+  - name: Fail if pods are not getting created
+    fail:
+      msg: "Pods are not getting created !"
+    when: pod_count.stdout|int == 0
+
+  - name: Fail if jobs are not getting created
+    fail:
+      msg: "Jobs are not getting created !"
+    when: job_count.stdout|int == 0
+
+  - debug:
+      msg: "{{ output_jobs.stdout_lines }}"
+
+  - debug:
+      msg: "{{ output_pods.stdout_lines }}"
+
+  - name: Delete cronjob if requested
+    shell: oc delete -f "{{ role_path }}/files/cronjob.yml"
+    when: delete_cronjob

playbooks/roles/ocp-cronjob/templates/cron-job.yml.j2

@@ -0,0 +1,29 @@
+---
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: {{ job_name }}
+  namespace: "{{ cronjob_namespace }}"
+spec:
+  schedule: "{{ cronjob_schedule }}"  
+  concurrencyPolicy: "{{ cronjob_concurrencyPolicy }}"  
+  startingDeadlineSeconds: {{ cronjob_startingDeadlineSeconds }}
+  suspend: {{ cronjob_suspend }}              
+  successfulJobsHistoryLimit: {{ cronjob_successfulJobsHistoryLimit }} 
+  failedJobsHistoryLimit: {{ cronjob_failedJobsHistoryLimit }}
+  jobTemplate:                  
+    spec:
+      template:
+        metadata:
+          labels:              
+            parent: "cronjobpi"
+        spec:
+          containers:
+          - name: {{ container_name }}
+            image: {{ container_image }}
+{% if cronjob_concurrencyPolicy or cronjob_startingDeadlineSeconds %}
+            command: ["sleep", "80"]
+{% else %}
+            command: ["echo", "Hello Openshift !!"]
+{% endif %}
+          restartPolicy: Never