From 8e7c5c970b8adc83fd6d5cad115f4edb06b36d98 Mon Sep 17 00:00:00 2001
From: Scott Dodson <sdodson@redhat.com>
Date: Mon, 5 Oct 2015 12:53:10 -0400
Subject: Containerization work by @sdodson

---
 roles/etcd/defaults/main.yaml            |  1 +
 roles/etcd/handlers/main.yml             |  3 ++-
 roles/etcd/tasks/main.yml                | 38 ++++++++++++++++++++++++++++++--
 roles/etcd/templates/etcd.conf.j2        | 22 +++++++++---------
 roles/etcd/templates/etcd.docker.service | 13 +++++++++++
 5 files changed, 63 insertions(+), 14 deletions(-)
 create mode 100644 roles/etcd/templates/etcd.docker.service

(limited to 'roles/etcd')

diff --git a/roles/etcd/defaults/main.yaml b/roles/etcd/defaults/main.yaml
index 0fd3de585..9e7fa59cf 100644
--- a/roles/etcd/defaults/main.yaml
+++ b/roles/etcd/defaults/main.yaml
@@ -1,4 +1,5 @@
 ---
+etcd_service: "{{ 'etcd' if not openshift.common.is_containerized else 'etcd_container' }}"
 etcd_interface: "{{ ansible_default_ipv4.interface }}"
 etcd_client_port: 2379
 etcd_peer_port: 2380
diff --git a/roles/etcd/handlers/main.yml b/roles/etcd/handlers/main.yml
index 4c0efb97b..aeb26d6b2 100644
--- a/roles/etcd/handlers/main.yml
+++ b/roles/etcd/handlers/main.yml
@@ -1,4 +1,5 @@
 ---
+
 - name: restart etcd
-  service: name=etcd state=restarted
+  service: name={{ etcd_service }} state=restarted
   when: not etcd_service_status_changed | default(false)
diff --git a/roles/etcd/tasks/main.yml b/roles/etcd/tasks/main.yml
index d661ce437..aef52886b 100644
--- a/roles/etcd/tasks/main.yml
+++ b/roles/etcd/tasks/main.yml
@@ -7,8 +7,42 @@
     msg: IPv4 address not found for {{ etcd_interface }}
   when: "'ipv4' not in hostvars[inventory_hostname]['ansible_' ~ etcd_interface] or 'address' not in hostvars[inventory_hostname]['ansible_' ~ etcd_interface].ipv4"
 
+- debug: var=openshift.common.is_containerized
+- debug: var=openshift.common.is_atomic
+
 - name: Install etcd
-  action: "{{ ansible_pkg_mgr }} name=etcd-2.* state=present" and not is_atomic
+  action: "{{ ansible_pkg_mgr }} name=etcd-2.* state=present"
+  when: not openshift.common.is_containerized | bool
+
+- name: Pull etcd container
+  command: >
+    docker pull {{ openshift.etcd.etcd_image }}
+  when: openshift.common.is_containerized | bool
+
+- name: Install etcd container service file
+  template:
+    dest: "/etc/systemd/system/etcd_container.service"
+    src: etcd.docker.service
+  register: install_etcd_result
+  when: openshift.common.is_containerized | bool
+  
+- name: Ensure etcd datadir exists
+  when: openshift.common.is_containerized | bool
+  file:
+    path: "{{ etcd_data_dir }}"
+    state: directory
+    mode: 0700
+
+- name: Disable system etcd when containerized
+  when: openshift.common.is_containerized | bool
+  service:
+    name: etcd
+    state: stopped
+    enabled: no
+
+- name: Reload systemd units
+  command: systemctl daemon-reload
+  when: openshift.common.is_containerized and ( install_etcd_result | changed )
 
 - name: Validate permissions on the config dir
   file:
@@ -52,7 +86,7 @@
 
 - name: Enable etcd
   service:
-    name: etcd
+    name: "{{ etcd_service }}"
     state: started
     enabled: yes
   register: start_result
diff --git a/roles/etcd/templates/etcd.conf.j2 b/roles/etcd/templates/etcd.conf.j2
index 32577c96c..28816fd87 100644
--- a/roles/etcd/templates/etcd.conf.j2
+++ b/roles/etcd/templates/etcd.conf.j2
@@ -15,13 +15,13 @@ ETCD_LISTEN_PEER_URLS={{ etcd_listen_peer_urls }}
 ETCD_NAME=default
 {% endif %}
 ETCD_DATA_DIR={{ etcd_data_dir }}
-#ETCD_SNAPSHOT_COUNTER="10000"
-ETCD_HEARTBEAT_INTERVAL="500"
-ETCD_ELECTION_TIMEOUT="2500"
+#ETCD_SNAPSHOT_COUNTER=10000
+ETCD_HEARTBEAT_INTERVAL=500
+ETCD_ELECTION_TIMEOUT=2500
 ETCD_LISTEN_CLIENT_URLS={{ etcd_listen_client_urls }}
-#ETCD_MAX_SNAPSHOTS="5"
-#ETCD_MAX_WALS="5"
-#ETCD_CORS=""
+#ETCD_MAX_SNAPSHOTS=5
+#ETCD_MAX_WALS=5
+#ETCD_CORS=
 
 {% if groups[etcd_peers_group] and groups[etcd_peers_group] | length > 1 %}
 #[cluster]
@@ -29,15 +29,15 @@ ETCD_INITIAL_ADVERTISE_PEER_URLS={{ etcd_initial_advertise_peer_urls }}
 ETCD_INITIAL_CLUSTER={{ initial_cluster() }}
 ETCD_INITIAL_CLUSTER_STATE={{ etcd_initial_cluster_state }}
 ETCD_INITIAL_CLUSTER_TOKEN={{ etcd_initial_cluster_token }}
-#ETCD_DISCOVERY=""
-#ETCD_DISCOVERY_SRV=""
-#ETCD_DISCOVERY_FALLBACK="proxy"
-#ETCD_DISCOVERY_PROXY=""
+#ETCD_DISCOVERY=
+#ETCD_DISCOVERY_SRV=
+#ETCD_DISCOVERY_FALLBACK=proxy
+#ETCD_DISCOVERY_PROXY=
 {% endif %}
 ETCD_ADVERTISE_CLIENT_URLS={{ etcd_advertise_client_urls }}
 
 #[proxy]
-#ETCD_PROXY="off"
+#ETCD_PROXY=off
 
 #[security]
 {% if etcd_url_scheme == 'https' -%}
diff --git a/roles/etcd/templates/etcd.docker.service b/roles/etcd/templates/etcd.docker.service
new file mode 100644
index 000000000..8058fa188
--- /dev/null
+++ b/roles/etcd/templates/etcd.docker.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=The Etcd Server container
+After=docker.service
+
+[Service]
+EnvironmentFile=/etc/etcd/etcd.conf
+ExecStartPre=-/usr/bin/docker rm -f {{ etcd_service }}
+ExecStart=/usr/bin/docker run --name {{ etcd_service }} --rm -v /var/lib/etcd:/var/lib/etcd:z -v /etc/etcd:/etc/etcd:z --env-file=/etc/etcd/etcd.conf --net=host --entrypoint=/usr/bin/etcd {{ openshift.etcd.etcd_image }}
+ExecStop=/usr/bin/docker stop {{ etcd_service }}
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
-- 
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