run etcd as docker container

roles/coreos-bootstrap/tasks/main.yml

@@ -42,6 +42,7 @@
 - name: Check configured hostname
   shell: hostname
   register: configured_hostname
+  changed_when: false
 
 - name: Assign inventory name to unconfigured hostnames
   shell: sh -c "echo \"{{inventory_hostname}}\" > /etc/hostname; hostname \"{{inventory_hostname}}\""

roles/etcd/defaults/main.yml

@@ -2,9 +2,5 @@
 etcd_version: v3.0.1
 etcd_bin_dir: "{{ local_release_dir }}/etcd/etcd-{{ etcd_version }}-linux-amd64/"
 
-# Possible values: host, docker
-etcd_deployment_type: "host"
-
-
 etcd_image_repo: "quay.io/coreos/etcd"
 etcd_image_tag: "{{ etcd_version }}"

roles/etcd/handlers/main.yml

@@ -19,4 +19,4 @@
 - name: reload etcd
   service:
     name: etcd
-    state: "{{ 'restarted' if etcd_deployment_type == 'host' else 'reloaded' }}"
+    state: reloaded

roles/etcd/meta/main.yml

@@ -3,8 +3,6 @@ dependencies:
   - role: adduser
     user: "{{ addusers.etcd }}"
     when: ansible_os_family != 'CoreOS'
-  - role: download
-    file: "{{ downloads.etcd }}"
-    when: etcd_deployment_type == "host"
+  - role: kubernetes/common
   - role: docker
-    when: (ansible_os_family != "CoreOS" and etcd_deployment_type == "docker")
+    when: ansible_os_family != "CoreOS"

roles/etcd/tasks/configure.yml

@@ -12,7 +12,7 @@
 
 - name: Configure | Copy etcd.service systemd file
   template:
-    src: "etcd-{{ etcd_deployment_type }}.service.j2"
+    src: "etcd.service.j2"
     dest: /etc/systemd/system/etcd.service
     backup: yes
   when: ansible_service_mgr == "systemd"
@@ -20,7 +20,7 @@
 
 - name: Configure | Write etcd initd script
   template:
-    src: "deb-etcd-{{ etcd_deployment_type }}.initd.j2"
+    src: "deb-etcd.initd.j2"
     dest: /etc/init.d/etcd
     owner: root
     mode: 0755

roles/etcd/tasks/install.yml

@@ -1,39 +0,0 @@
----
-- name: Install | Copy etcd binary from downloaddir
-  command: rsync -piu "{{ etcd_bin_dir }}/etcd" "{{ bin_dir }}/etcd"
-  when: etcd_deployment_type == "host"
-  register: etcd_copy
-  changed_when: false
-
-- name: Install | Copy etcdctl binary from downloaddir
-  command: rsync -piu "{{ etcd_bin_dir }}/etcdctl" "{{ bin_dir }}/etcdctl"
-  when: etcd_deployment_type == "host"
-  changed_when: false
-
-#Plan A: no docker-py deps
-- name: Install | Copy etcdctl binary from container
-  command: sh -c "/usr/bin/docker rm -f etcdctl-binarycopy;
-           /usr/bin/docker create --name etcdctl-binarycopy {{ etcd_image_repo }}:{{ etcd_image_tag }} &&
-           /usr/bin/docker cp etcdctl-binarycopy:{{ etcd_container_bin_dir }}etcdctl {{ bin_dir }}/etcdctl &&
-           /usr/bin/docker rm -f etcdctl-binarycopy"
-  when: etcd_deployment_type == "docker"
-  changed_when: false
-
-#Plan B: looks nicer, but requires docker-py on all hosts:
-#- name: Install | Set up etcd-binarycopy container
-#  docker:
-#    name: etcd-binarycopy
-#    state: present
-#    image: "{{ etcd_image_repo }}:{{ etcd_image_tag }}"
-#  when: etcd_deployment_type == "docker"
-#
-#- name: Install | Copy etcdctl from etcd-binarycopy container
-#  command: /usr/bin/docker cp "etcd-binarycopy:{{ etcd_container_bin_dir }}etcdctl" "{{ bin_dir }}/etcdctl"
-#  when: etcd_deployment_type == "docker"
-#
-#- name: Install | Clean up etcd-binarycopy container
-#  docker:
-#    name: etcd-binarycopy
-#    state: absent
-#    image: "{{ etcd_image_repo }}:{{ etcd_image_tag }}"
-#  when: etcd_deployment_type == "docker"

roles/etcd/tasks/main.yml

@@ -1,14 +1,18 @@
 ---
 - include: set_facts.yml
-- include: install.yml
-- include: set_cluster_health.yml
-- include: configure.yml
-- include: refresh_config.yml
 
-- name: Restart etcd if binary changed
-  command: /bin/true
-  notify: restart etcd
-  when: etcd_deployment_type == "host" and etcd_copy.stdout_lines
+- name: Install | Copy etcdctl binary from container
+  command: sh -c "/usr/bin/docker rm -f etcdctl-binarycopy;
+           /usr/bin/docker create --name etcdctl-binarycopy {{ etcd_image_repo }}:{{ etcd_image_tag }} &&
+           /usr/bin/docker cp etcdctl-binarycopy:{{ etcd_container_bin_dir }}etcdctl {{ bin_dir }}/etcdctl &&
+           /usr/bin/docker rm -f etcdctl-binarycopy"
+  changed_when: false
+
+- include: set_cluster_health.yml
+
+- include: configure.yml
+
+- include: refresh_config.yml
 
 # Reload systemd before starting service
 - meta: flush_handlers

roles/etcd/tasks/set_facts.yml

@@ -2,18 +2,22 @@
 - set_fact: etcd_access_address="{{access_ip | default(ip | default(ansible_default_ipv4['address']))}}"
 - set_fact: etcd_peer_url="http://{{ etcd_access_address }}:2380"
 - set_fact: etcd_client_url="http://{{ etcd_access_address }}:2379"
+
 - set_fact:
     etcd_access_addresses: |-
       {% for item in groups['etcd'] -%}
         http://{{ hostvars[item].etcd_access_address }}:2379{% if not loop.last %},{% endif %}
       {%- endfor %}
+
 - set_fact:
     etcd_member_name: |-
       {% for host in groups['etcd'] %}
       {%   if inventory_hostname == host %}{{"etcd"+loop.index|string }}{% endif %}
       {% endfor %}
+
 - set_fact:
     is_etcd_master: "{{ inventory_hostname in groups['etcd'] }}"
+
 - set_fact:
     etcd_after_v3: etcd_version | version_compare("v3.0.0", ">=")
 - set_fact:

roles/etcd/templates/deb-etcd-host.initd.j2

@@ -1,114 +0,0 @@
-#!/bin/sh
-set -a
-
-### BEGIN INIT INFO
-# Provides:   etcd
-# Required-Start:    $local_fs $network $syslog
-# Required-Stop:
-# Default-Start:     2 3 4 5
-# Default-Stop:      0 1 6
-# Short-Description: etcd distributed k/v store
-# Description:
-#   etcd is a distributed, consistent key-value store for shared configuration and service discovery
-### END INIT INFO
-
-PATH=/sbin:/usr/sbin:/bin:/usr/bin
-DESC="etcd k/v store"
-NAME=etcd
-DAEMON={{ bin_dir }}/etcd
-{% if is_etcd_master %}
-DAEMON_ARGS=""
-{% else %}
-DAEMON_ARGS="--proxy on"
-{% endif %}
-SCRIPTNAME=/etc/init.d/$NAME
-DAEMON_USER=etcd
-STOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"
-PID=/var/run/etcd.pid
-
-# Exit if the binary is not present
-[ -x "$DAEMON" ] || exit 0
-
-# Read configuration variable file if it is present
-[ -f /etc/etcd.env ] && . /etc/etcd.env
-
-# Define LSB log_* functions.
-# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
-# and status_of_proc is working.
-. /lib/lsb/init-functions
-
-do_status()
-{
-    status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?
-}
-
-# Function that starts the daemon/service
-#
-do_start()
-{
-    start-stop-daemon --background --start --quiet --make-pidfile --pidfile $PID --user $DAEMON_USER --exec $DAEMON -- \
-        $DAEMON_ARGS \
-        || return 2
-}
-
-#
-# Function that stops the daemon/service
-#
-do_stop()
-{
-    start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAME
-    RETVAL="$?"
-
-    sleep 1
-    return "$RETVAL"
-}
-
-
-case "$1" in
-  start)
-        log_daemon_msg "Starting $DESC" "$NAME"
-        do_start
-        case "$?" in
-                0|1) log_end_msg 0 || exit 0 ;;
-                2) log_end_msg 1 || exit 1 ;;
-        esac
-        ;;
-  stop)
-        log_daemon_msg "Stopping $DESC" "$NAME"
-        if do_stop; then
-            log_end_msg 0
-        else
-            log_failure_msg "Can't stop etcd"
-            log_end_msg 1
-        fi
-        ;;
-  status)
-        if do_status; then
-            log_end_msg 0
-        else
-            log_failure_msg "etcd is not running"
-            log_end_msg 1
-        fi
-        ;;
-
-  restart|force-reload)
-        log_daemon_msg "Restarting $DESC" "$NAME"
-        if do_stop; then
-            if do_start; then
-                log_end_msg 0
-                exit 0
-            else
-                rc="$?"
-            fi
-        else
-           rc="$?"
-        fi
-        log_failure_msg "Can't restart etcd"
-        log_end_msg ${rc}
-        ;;
-  *)
-        echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
-        exit 3
-        ;;
-esac
-

roles/etcd/templates/etcd-host.service.j2

@@ -1,18 +0,0 @@
-[Unit]
-Description=etcd
-
-
-[Service]
-User=etcd
-EnvironmentFile=/etc/etcd.env
-{% if inventory_hostname in groups['etcd'] %}
-ExecStart={{ bin_dir }}/etcd
-{% else %}
-ExecStart={{ bin_dir }}/etcd -proxy on
-{% endif %}
-Restart=always
-RestartSec=10s
-LimitNOFILE=40000
-
-[Install]
-WantedBy=multi-user.target

roles/kubernetes-apps/tasks/main.yaml

@@ -5,11 +5,6 @@
     state: latest
   when: ansible_os_family != "CoreOS" and kpm_packages | length > 0
 
-# workaround for the error "cannot import name IncompleteRead"
-- name: Upgrade pip
-  command: easy_install -U pip
-  changed_when: false
-
 - name: install kpm
   pip:
     name: "kpm"