init

CHANGELOG.md

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+# Changelog
+
+## 0.1.0
+  - Initial release

Makefile

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+NAME = osixia/keepalived
+VERSION = 0.1.0
+
+.PHONY: all build test tag_latest release
+
+all: build
+
+build:
+	docker build -t $(NAME):$(VERSION) --rm image
+
+test:
+	env NAME=$(NAME) VERSION=$(VERSION) bats test/test.bats
+
+tag_latest:
+	docker tag -f $(NAME):$(VERSION) $(NAME):latest
+
+release: build test tag_latest
+	@if ! docker images $(NAME) | awk '{ print $$2 }' | grep -q -F $(VERSION); then echo "$(NAME) version $(VERSION) is not yet built. Please run 'make build'"; false; fi
+	docker push $(NAME)
+	@echo "*** Don't forget to run 'twgit release/hotfix finish' :)"

image/Dockerfile

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+FROM osixia/baseimage:0.10.4
+MAINTAINER Bertrand Gouny <bertrand.gouny@osixia.net>
+
+# This container need run options :
+# --privileged=true
+# --net=host
+
+# Use baseimage-docker's init system.
+CMD ["/sbin/my_init"]
+
+# Install Keepalived
+RUN apt-get -y update \
+    && LC_ALL=C DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    keepalived
+
+# Add Keepalived assets
+ADD service/keepalived/assets /osixia/keepalived
+
+# Run clean all
+RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# Add default env variables
+ADD env.yml /etc/env.yml
+
+# Add Keepalived container start config & daemon
+ADD service/keepalived/container-start.sh /etc/my_init.d/keepalived
+ADD service/keepalived/daemon.sh /etc/service/keepalived/run

image/env.yml

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+KEEPALIVED_PASSWORD: d0cker
+
+# for electing MASTER, highest priority wins.
+# to be MASTER, make 50 more than other machines
+KEEPALIVED_PRIORITY: 150
+
+KEEPALIVED_UNICAST_PEER:
+  - 172.17.8.101
+  - 172.17.8.102
+  - 172.17.8.103
+
+KEEPALIVED_VIRTUAL_IPS:
+  - 192.168.200.17/24 dev eth1
+  - 192.168.200.18/24 dev eth2 label eth2:1

image/service/keepalived/assets/README.md

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+Add your custom keepalived.conf file here or mount one at docker run to /etc/keepalived/keepalived.conf

image/service/keepalived/assets/keepalived.conf

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+vrrp_instance VI_1 {
+  interface eno1
+  state MASTER
+  virtual_router_id 51
+  priority {{ keepalived_priority }}
+
+  unicast_peer {
+    {{ peer_ip }}
+  }
+
+  virtual_ipaddress {
+    {{ floating_ip }}
+  }
+
+  authentication {
+    auth_type PASS
+    auth_pass {{ keepalived_password }}
+  }
+}

image/service/keepalived/container-start.sh

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+#!/bin/bash -e
+
+FIRST_START_DONE="/etc/docker-keepalived-first-start-done"
+
+# container first start
+if [ ! -e "$FIRST_START_DONE" ]; then
+
+  # config folder is empty use bootstrap config if available
+  if [ ! -e /etc/keepalived/keepalived.conf ]; then
+    echo "No keepalived.conf provided using image default one"
+    if [ ! -e /osixia/keepalived/keepalived.conf ]; then
+      echo "Error: No default keepalived.conf found in /osixia/keepalived/keepalived.conf"
+      exit 1
+    else
+      ln -s /osixia/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
+    fi
+  fi
+
+  touch $FIRST_START_DONE
+fi
+
+exit 0

image/service/keepalived/daemon.sh

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+#!/bin/bash -e
+exec /usr/sbin/keepalived -f /etc/keepalived/keepalived.conf --dont-fork --log-console

test/test.bats

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+#!/usr/bin/env bats
+load test_helper
+
+@test "image build" {
+
+  run build_image
+  [ "$status" -eq 0 ]
+
+}

test/test_helper.bash

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+setup() {
+  IMAGE_NAME="$NAME:$VERSION"
+}
+
+# function relative to the current container / image  
+build_image() {
+  #disable outputs
+  docker build -t $IMAGE_NAME $BATS_TEST_DIRNAME/../image &> /dev/null
+}
+
+run_image() {
+  CONTAINER_ID=$(docker run $@ -d $IMAGE_NAME)
+  CONTAINER_IP=$(get_container_ip_by_cid $CONTAINER_ID)
+}
+
+start_container() {
+  start_containers_by_cid $CONTAINER_ID
+}
+
+stop_container() {
+  stop_containers_by_cid $CONTAINER_ID
+}
+
+remove_container() {
+ remove_containers_by_cid $CONTAINER_ID
+}
+
+clear_container() {
+  stop_containers_by_cid $CONTAINER_ID
+  remove_containers_by_cid $CONTAINER_ID
+}
+
+is_service_running() {
+  is_service_running_by_cid $CONTAINER_ID $1
+}
+
+wait_service() {
+  wait_service_by_cid $CONTAINER_ID $@
+}
+
+
+# generic functions 
+get_container_ip_by_cid() {
+  local IP=$(docker inspect -f "{{ .NetworkSettings.IPAddress }}" $1)
+  echo "$IP"
+}
+
+start_containers_by_cid() {
+  for cid in "$@"
+  do
+    #disable outputs
+    docker start $cid &> /dev/null
+  done 
+}
+
+stop_containers_by_cid() {
+  for cid in "$@"
+  do
+    #disable outputs
+    docker stop $cid &> /dev/null
+  done 
+}
+
+remove_containers_by_cid() {
+  for cid in "$@"
+  do
+    #disable outputs
+    docker rm $cid &> /dev/null
+  done 
+}
+
+clear_containers_by_cid() {
+  stop_containers_by_cid $@
+  remove_containers_by_cid $@
+}
+
+is_service_running_by_cid() {
+  docker exec $1 ps cax | grep $2  > /dev/null
+}
+
+wait_service_by_cid() {
+
+  cid=$1
+
+  # first wait image init end
+  while ! is_service_running_by_cid $cid syslog-ng
+  do
+    sleep 1
+  done
+
+  for service in "${@:2}"
+  do
+    # wait service
+    while ! is_service_running_by_cid $cid $service
+    do
+      sleep 1
+    done
+  done
+
+  sleep 5
+}