[PLAT-14546] Ansible task to replace CentOS 7 repo URLs

Summary: With the EOL of CentOS 7 there are certain mirror URLs that are now invalid. We can replace these with the vault version (and comment out the mirrorlists) to temporarily unblock CentOS 7 universe creation.

Test Plan: Create universe on CentOS 7 gcp, ensure yum installs can complete.

Reviewers: sanketh, anijhawan, svarshney

Reviewed By: anijhawan

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D36453

managed/devops/preprovision.yml

@@ -126,6 +126,28 @@
       when: cloud_type == "gcp" and machine_image is match(".*centos-7.*")
       tags: yb-prebuilt-ami
 
+    - block:
+      - name: Find CentOS repo files
+        find:
+          paths: /etc/yum.repos.d/
+          patterns: 'CentOS-*'
+        register: repo_files
+
+      - name: Comment out mirrorlist URLs on CentOS 7
+        replace:
+          dest: "{{ item }}"
+          regexp: '^mirrorlist='
+          replace: '#mirrorlist='
+        with_items: "{{ repo_files.files | map(attribute='path') | list }}"
+
+      - name: Uncomment and set baseurl to vault in CentOS 7 repo files
+        replace:
+          dest: "{{ item }}"
+          regexp: '^#?baseurl=http://mirror.centos.org'
+          replace: 'baseurl=http://vault.centos.org'
+        with_items: "{{ repo_files.files | map(attribute='path') | list }}"
+      when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '7'
+
     - name: Gather package facts
       package_facts:
       tags: yb-prebuilt-ami

managed/devops/roles/server_base/tasks/server_base_linux.yml

@@ -118,6 +118,32 @@
 
     when: ansible_os_family == "RedHat" and (cloud_type is not defined or cloud_type != "onprem")
 
+  - block:
+    - name: Find CentOS repo files
+      find:
+        paths: /etc/yum.repos.d/
+        patterns: 'CentOS-*'
+      register: repo_files
+
+    - name: Comment out mirrorlist URLs on CentOS 7
+      become: yes
+      become_method: sudo
+      replace:
+        dest: "{{ item }}"
+        regexp: '^mirrorlist='
+        replace: '#mirrorlist='
+      with_items: "{{ repo_files.files | map(attribute='path') | list }}"
+
+    - name: Uncomment and set baseurl to vault in CentOS 7 repo files
+      become: yes
+      become_method: sudo
+      replace:
+        dest: "{{ item }}"
+        regexp: '^#?baseurl=http://mirror.centos.org'
+        replace: 'baseurl=http://vault.centos.org'
+      with_items: "{{ repo_files.files | map(attribute='path') | list }}"
+    when: ansible_distribution == 'CentOS' and ansible_distribution_major_version == '7'
+
   - name: Gather package facts
     package_facts: