ansible: ignore errors in redis kernel configuration in Docker

ansible/roles/redis/tasks/main.yml

@@ -107,6 +107,7 @@
     state: started
     enabled: true
   when: "'[never]' not in transparent_hugepage.stdout"
+  ignore_errors: "{{ is_docker }}"
 
 - name: Check if kernel overcommit mode is already set
   command:
@@ -118,11 +119,13 @@
   command:
     cmd: sysctl vm.overcommit_memory=1
   when: overcommit_memory.stdout == "0"
+  ignore_errors: "{{ is_docker }}"
 
 - name: Make kernel overcommit mode permanent (recommended by Redis, requires restart)
   lineinfile:
     path: /etc/sysctl.conf
     line: vm.overcommit_memory = 1
+  ignore_errors: "{{ is_docker }}"
 
 - name: Start and enable redis service
   service: