commit

elasticsearch-revert.yml

@@ -0,0 +1,102 @@
+---
+- name: Uninstall and Revert Elasticsearch Configuration
+  hosts: elasticsearch_hosts
+  become: true
+  vars:
+    # Set this to 'false' if you want to keep Java (OpenJDK) installed on the system
+    # because other applications might be using it.
+    remove_java: true
+
+  tasks:
+    - name: "BLOCK: Stop and Remove Elasticsearch Service"
+      block:
+        - name: Stop and disable Elasticsearch service
+          ansible.builtin.systemd:
+            name: elasticsearch
+            state: stopped
+            enabled: false
+          ignore_errors: true # Ignore errors if the service doesn't exist
+
+        - name: Purge Elasticsearch package and its config files
+          ansible.builtin.apt:
+            name: elasticsearch
+            state: absent
+            autoremove: true
+            purge: true
+          ignore_errors: true # Ignore errors if the package isn't installed
+
+    - name: "BLOCK: Clean Up Elasticsearch Files and Directories"
+      block:
+        # --- MODIFIED SECTION START ---
+        - name: Find all contents within the /var/lib/elasticsearch mountpoint
+          ansible.builtin.find:
+            paths: /var/lib/elasticsearch
+            hidden: true
+          register: contents_to_delete
+
+        - name: Delete all contents found within the mountpoint (leaving the mountpoint itself)
+          ansible.builtin.file:
+            path: "{{ item.path }}"
+            state: absent
+          loop: "{{ contents_to_delete.files | sort(attribute='path', reverse=true) }}"
+          loop_control:
+            label: "{{ item.path }}"
+        # --- MODIFIED SECTION END ---
+
+        - name: Remove Elasticsearch log directory
+          ansible.builtin.file:
+            path: /var/log/elasticsearch
+            state: absent
+
+        - name: Remove Elasticsearch config directory (just in case purge missed it)
+          ansible.builtin.file:
+            path: /etc/elasticsearch
+            state: absent
+
+    - name: "BLOCK: Remove APT Repository and GPG Key"
+      block:
+        - name: Remove Elasticsearch APT repository
+          ansible.builtin.apt_repository:
+            repo: "deb https://artifacts.elastic.co/packages/9.x/apt stable main"
+            state: absent
+            filename: elastic-9.x
+
+        - name: Remove Elasticsearch GPG key
+          ansible.builtin.file:
+            path: /etc/apt/trusted.gpg.d/elasticsearch.gpg
+            state: absent
+
+    - name: "BLOCK: Revert System Tuning"
+      block:
+        - name: Revert vm.max_map_count setting
+          ansible.posix.sysctl:
+            name: vm.max_map_count
+            state: absent
+            reload: true
+
+        - name: Remove Elasticsearch user memory limit
+          community.general.pam_limits:
+            domain: "elasticsearch"
+            limit_type: "-"
+            limit_item: "memlock"
+            state: absent
+
+        - name: Remove Elasticsearch user file descriptor limit
+          community.general.pam_limits:
+            domain: "elasticsearch"
+            limit_type: "-"
+            limit_item: "nofile"
+            state: absent
+
+    - name: "BLOCK: (Optional) Uninstall Java"
+      block:
+        - name: Uninstall OpenJDK package
+          ansible.builtin.apt:
+            name: openjdk-21-jdk
+            state: absent
+            autoremove: true
+      when: remove_java
+
+    - name: Final APT cache update
+      ansible.builtin.apt:
+        update_cache: true