feat: support passing container environment variables

This feature could be useful if the operator want to
configure http_proxy for instance.

Author: ntk148v

ansible/group_vars/all.yml

@@ -50,6 +50,12 @@ docker_memory_limit: "{{ ansible_memtotal_mb }}M"
 docker_memory_swap_limit: "{{ docker_memory_limit }}"
 # How much of the available CPU resources a container can use.
 docker_cpus_limit: "{{ ansible_processor_count }}"
+# Container global environment variables. It will be applied to all containers.
+# docker_container_env:
+#   http_proxy: http://localhost:8000
+#   https_proxy: http://localhost:8000
+#   no_proxy: localhost, 127.0.0.1
+docker_container_env: {}
 
 ##################
 # Service options

ansible/roles/alertmanager/defaults/main.yml

@@ -121,6 +121,10 @@ alertmanager_route:
 #             owner: team-Y
 #           receiver: team-Y-pager
 
+# Alertmanager environment variables
+# ----------------------------------
+alertmanager_env: "{{ docker_container_env}}"
+
 # Container constructors
 # ----------------------
 alertmanager_services:
@@ -175,3 +179,4 @@ alertmanager_services:
     memory: "{{ alertmanager_docker_memory_limit }}"
     memory_swap: "{{ alertmanager_docker_memory_swap_limit }}"
     cpus: "{{ alertmanager_docker_cpus_limit }}"
+    env: "{{ alertmanager_env }}"

ansible/roles/alertmanager/meta/argument_specs.yml

@@ -73,3 +73,7 @@ argument_specs:
       alertmanager_route:
         description: "Alert routing. More in L(official docs,https://prometheus.io/docs/alerting/configuration/#route)"
         type: "dict"
+      alertmanager_env:
+        description: "Environment variables for alertmanager container"
+        type: "dict"
+        default: "{{ docker_container_env }}"

ansible/roles/alertmanager/tasks/config.yml

@@ -73,6 +73,7 @@
     memory: "{{ item.value.memory }}"
     memory_swap: "{{ item.value.memory_swap }}"
     cpus: "{{ item.value.cpus }}"
+    env: "{{ item.value.env }}"
   when:
     - inventory_hostname in groups[item.value.group]
     - item.value.enabled | bool

ansible/roles/cadvisor/defaults/main.yml

@@ -21,6 +21,10 @@ cadvisor_docker_only: false
 cadvisor_housekeeping_interval: 30s
 cadvisor_config_flags_extra: {}
 
+# Cadvisor environment variables
+# ----------------------------------
+cadvisor_env: "{{ docker_container_env}}"
+
 # Container constructor
 # ---------------------
 cadvisor_services:
@@ -64,3 +68,4 @@ cadvisor_services:
     memory: "{{ cadvisor_docker_memory_limit }}"
     memory_swap: "{{ cadvisor_docker_memory_swap_limit }}"
     cpus: "{{ cadvisor_docker_cpus_limit }}"
+    env: "{{ cadvisor_env }}"

ansible/roles/cadvisor/meta/argument_specs.yml

@@ -61,3 +61,7 @@ argument_specs:
         description:
           - "Additional configuration flags passed to cadvisor binary at startup"
         type: "dict"
+      cadvisor_env:
+        description: "Environment variables for cadvisor container"
+        type: "dict"
+        default: "{{ docker_container_env }}"

ansible/roles/cadvisor/tasks/config.yml

@@ -14,6 +14,7 @@
     memory: "{{ item.value.memory }}"
     memory_swap: "{{ item.value.memory_swap }}"
     cpus: "{{ item.value.cpus }}"
+    env: "{{ item.value.env }}"
   when:
     - inventory_hostname in groups[item.value.group]
     - item.value.enabled | bool

ansible/roles/fluentd/defaults/main.yml

@@ -12,6 +12,8 @@ fluentd_docker_cpus_limit: "{{ docker_cpus_limit }}"
 
 fluentd_config_dir: "{{ ansitheus_config_dir }}/fluentd"
 
+fluentd_env: "{{ docker_container_env }}"
+
 fluentd_services:
   fluentd:
     container_name: "{{ fluentd_container_name }}"
@@ -29,3 +31,4 @@ fluentd_services:
     memory: "{{ fluentd_docker_memory_limit }}"
     memory_swap: "{{ fluentd_docker_memory_swap_limit }}"
     cpus: "{{ fluentd_docker_cpus_limit }}"
+    env: "{{ fluentd_env }}"

ansible/roles/fluentd/meta/argument_specs.yml

@@ -11,3 +11,6 @@ argument_specs:
       fluentd_version:
         description: "Fluentd version"
         default: "1.17"
+      fluentd_env:
+        description: "Fluentd environment variables"
+        default: "{{ docker_container_env}}"

ansible/roles/fluentd/tasks/config.yml

@@ -62,6 +62,7 @@
     memory: "{{ item.value.memory }}"
     memory_swap: "{{ item.value.memory_swap }}"
     cpus: "{{ item.value.cpus }}"
+    env: "{{ item.value.env }}"
   when:
     - inventory_hostname in groups[item.value.group]
     - item.value.enabled | bool