feat(zammad): support limiting elasticsearch memory

roles/zammad/defaults/main.yml

@@ -20,6 +20,9 @@ zammad_network:
 zammad_host_network: ~
 zammad_allow_host_nework: ~
 
+zammad_elastic_max_mem_in_mb: 512
+zammad_elastic_min_mem_in_mb: 256
+
 # The container order is *very* important!
 zammad_containers:
   - name: "zammad-postgresql"
@@ -62,6 +65,9 @@ zammad_containers:
     networks:
       - name: "{{ zammad_network.name }}"
     add_host_network: "{{ zammad_allow_host_nework.elasticsearch | default(False) }}"
+    memory_limit: "{{ zammad_elastic_max_mem_in_mb }}M"
+    env:
+      ES_JAVA_OPTS: "-Xms{{ zammad_elastic_min_mem_in_mb }}m -Xmx{{ zammad_elastic_max_mem_in_mb }}m"
 
   - name: "zammad-websocket"
     image_name: "{{ zammad_container_repo }}"

roles/zammad/tasks/main.yml

@@ -39,6 +39,16 @@
   notify: Restart elasticsearch
   loop: "{{ zammad_elasticsearch_files }}"
 
+- name: Template elasticsearch jvm options
+  template:
+    src: jvm.options.j2
+    dest: "{{ zammad_base_path }}/elasticsearch-config/jvm.options"
+    owner: "{{ zammad_user_res.uid }}"
+    group: "{{ zammad_user_res.group }}"
+    mode: "0660"
+  tags: [ 'prepare', 'prepare-zammad' ]
+  notify: Restart elasticsearch
+
 - name: Template fake /etc/passwd for postgres
   template:
     src: postgres-passwd.j2
@@ -91,6 +101,7 @@
     labels: "{{ container.labels | default(omit) }}"
     volumes: "{{ container.volumes | default(omit) }}"
     restart_policy: "{{ container.restart_policy }}"
+    memory: "{{ container.memory_limit | default(omit) }}"
     state: "{{ container.state | default('started') }}"
     comparisons:
       networks: strict

roles/zammad/templates/jvm.options.j2

@@ -19,8 +19,8 @@
 # Xms represents the initial size of total heap space
 # Xmx represents the maximum size of total heap space
 
--Xms1g
+-Xms{{ zammad_elastic_min_mem_in_mb }}m
--Xmx1g
+-Xmx{{ zammad_elastic_max_mem_in_mb }}m
 
 ################################################################
 ## Expert settings

roles/zammad/vars/main.yml

@@ -17,8 +17,6 @@ zammad_directories:
 zammad_elasticsearch_files:
   - src: elasticsearch.yml
     mode: 660
-  - src: jvm.options
-    mode: 660
   - src: log4j2.properties
     mode: 660