add support for install in LXCcontainers

Author: siavashsardari

tasks/install.yml

@@ -1,12 +1,22 @@
 ---
+- name: check if inside container
+  command: grep -qa container=lxc /proc/1/environ
+  register: container_env
+
+- name: set fact inside container
+  set_fact:
+    inside_container: "{% if container_env.rc == 0 %}True{% else %}False{% endif %}"
+
 - name: enable overcommit in sysctl
   sysctl:
     name: vm.overcommit_memory
     value: "1"
     state: present
     reload: yes
     ignoreerrors: yes
-  when: redis_travis_ci is not defined
+  when: 
+      - redis_travis_ci is not defined
+      - container_env.rc != 0
 
 - name: compile redis
   shell: umask 0022 && make -j{{ ansible_processor_cores|default(1) + 1 }}{{ ' 32bit' if redis_make_32bit|bool else '' }}

templates/default/redis.service.j2

@@ -18,10 +18,10 @@ OOMScoreAdjust={{ redis_oom_score_adjust }}
 {% endif %}
 
 UMask=007
-PrivateTmp=yes
+PrivateTmp={{ 'no' if inside_container else 'yes' }}
 LimitNOFILE={{ redis_nofile_limit }}
-PrivateDevices=yes
-ProtectHome=yes
+PrivateDevices={{ 'no' if inside_container else 'yes' }}
+ProtectHome={{ 'no' if inside_container else 'yes' }}
 ReadOnlyDirectories=/
 ReadWriteDirectories=-{{ redis_dir }}
 {% if redis_logfile != '""' %}

templates/default/redis_sentinel.service.j2

@@ -18,10 +18,10 @@ OOMScoreAdjust={{ redis_sentinel_oom_score_adjust }}
 {% endif %}
 
 UMask=007
-PrivateTmp=yes
+PrivateTmp={{ 'no' if inside_container else 'yes' }}
 LimitNOFILE={{ redis_nofile_limit }}
-PrivateDevices=yes
-ProtectHome=yes
+PrivateDevices={{ 'no' if inside_container else 'yes' }}
+ProtectHome={{ 'no' if inside_container else 'yes' }}
 ReadOnlyDirectories=/
 ReadWriteDirectories=-{{ redis_sentinel_dir }}
 {% if redis_sentinel_logfile != '""' %}