├── .gitignore ├── CHANGELOG ├── LICENSE.md ├── README.md ├── defaults └── main.yml ├── handlers └── main.yml ├── meta └── main.yml ├── tasks └── main.yml ├── templates ├── check_script.sh.j2 ├── email_notify.sh.j2 ├── haproxy_check_script.sh.j2 ├── keepalived.conf.j2 └── service_check_script.sh.j2 └── test ├── Vagrantfile ├── Vagrantfile.Debian ├── Vagrantfile.RedHat └── playbook.yml /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store/* 2 | .vagrant/* 3 | -------------------------------------------------------------------------------- /CHANGELOG: -------------------------------------------------------------------------------- 1 | 20171107: 2 | - Fixes to check script, it was not working really: now MASTER and BACKUP works when you stop the process monitored (pablodav) 3 | - Fix deprecated warning for service state=running - now state=started (pablodav) 4 | - Fix wrong documentation type on mote in ansible 2.4 (pablodav) 5 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ansible-keepalived: Ansible role for setting up keepalived 2 | ============================================================ 3 | Toni Comerma - tcomerma (at) gmail.com 4 | 5 | This role sets up keepalived for an standard setup of: 6 | - One virtual IP 7 | - Two hosts 8 | 9 | You just need to provide an small amount of information to have it running 10 | - Add "keepalived" role to both hosts 11 | - Add variable keepalived_role: "master" | "slave" to the appropiate hosts 12 | - Add variable keepalived_shared_ip: "floating IP address" to both hosts 13 | 14 | Other variables can be configured, overwriting defaults/main.yml 15 | 16 | Keepalived can watch processes to influence on which node should be the master. Setting 17 | variable "keepalived_check_process" to the name of the process will do. I use keepalived 18 | to give high availability to haproxy, so I use. 19 | 20 | keepalived_check_process: "haproxy" 21 | 22 | Dependencies 23 | ------------ 24 | Works with centos/redhat and Debian/Ubuntu 25 | 26 | Role Variables 27 | -------------- 28 | keepalived_auth_pass: "1111" 29 | keepalived_role: "MASTER" 30 | keepalived_router_id: "52" 31 | keepalived_shared_iface: "eth0" 32 | keepalived_shared_ip: "192.168.1.1" 33 | keepalived_check_process: "keepalived" 34 | keepalived_priority: "100" 35 | keepalived_backup_priority: "50" 36 | 37 | Example Playbook 38 | ------------------------- 39 | 40 | - hosts: s1 41 | roles: 42 | - { role: keepalived, keepalived_shared_ip: "192.168.1.1", keepalived_role: "master" } 43 | 44 | - hosts: s2 45 | roles: 46 | - { role: keepalived, keepalived_shared_ip: "192.168.1.1", keepalived_role: "slave" } 47 | 48 | 49 | Testing & trying 50 | ------------------ 51 | 52 | Quite simple if you have vagrant installed. 53 | 54 | - Pulling from github 55 | ``` 56 | mkdir -p test-keepalived/roles 57 | cd test-keepalived/roles 58 | git clone https://github.com/tcomerma/ansible-keepalived.git 59 | cd .. 60 | cp roles/ansible-keepalived/test/* . 61 | mv Vagrantfile.Debian Vagrantfile 62 | vagrant up 63 | ``` 64 | 65 | - Pulling from ansible-galaxy 66 | ``` 67 | mkdir -p test-keepalived/roles 68 | ansible-galaxy install -p test-keepalived/roles tcomerma.keepalived 69 | cd test-keepalived 70 | cp roles/tcomerma.keepalived/test/* . 71 | mv Vagrantfile.Debian Vagrantfile 72 | 73 | Edit playbook.yml and change "- ansible-keepalived" for "- tcomerma.keepalived" 74 | 75 | vagrant up 76 | ``` 77 | 78 | 79 | License 80 | ------- 81 | Apache 82 | 83 | Author Information 84 | ------------------ 85 | Toni Comerma - tcomerma (at) gmail.com 86 | 87 | Collaborator Information 88 | ------------------------ 89 | 90 | Pablo Estigarribia - pablodav (at) gmail dot com 91 | -------------------------------------------------------------------------------- /defaults/main.yml: -------------------------------------------------------------------------------- 1 | --- 2 | 3 | # Variables for role keepalived 4 | 5 | keepalived_auth_pass: "1111" 6 | keepalived_role: "MASTER" 7 | keepalived_router_id: "52" 8 | keepalived_shared_iface: "eth0" 9 | keepalived_shared_ips: 10 | - "192.168.1.1/24" 11 | keepalived_check_process: "nginx" 12 | keepalived_priority: "100" 13 | keepalived_backup_priority: "50" 14 | keepalived_check_script_name: "check_script" 15 | keepalived_unicast_mode: False 16 | keepalived_unicast_source: "10.0.0.1" 17 | keepalived_unicast_peers: 18 | - "10.0.0.2" 19 | keepalived_notification_email: False # Setting an email address will install, start and enable postfix 20 | 21 | keepalived_notification_script: False # Execute a custom script when state changes - NOT compatible with email notification 22 | keepalived_notification_command_backup: False # Execute a command when state changes to backup 23 | keepalived_notification_command_master: False # Execute a command when state changes to master 24 | keepalived_notification_command_fault: False # Execute a command when state changes to fault 25 | -------------------------------------------------------------------------------- /handlers/main.yml: -------------------------------------------------------------------------------- 1 | --- 2 | 3 | - name: restart keepalived 4 | service: name=keepalived state=restarted 5 | 6 | - name: restart network 7 | service: name=network state=restart -------------------------------------------------------------------------------- /meta/main.yml: -------------------------------------------------------------------------------- 1 | --- 2 | galaxy_info: 3 | author: Toni Comerma 4 | description: "Role for setting up keepalived" 5 | company: Televisio de Catalunya 6 | license: license (Apache) 7 | min_ansible_version: 1.5 8 | platforms: 9 | - name: EL 10 | versions: 11 | - 5 12 | - 6 13 | - name: Ubuntu 14 | versions: 15 | - all 16 | - name: Debian 17 | versions: 18 | - all 19 | categories: 20 | - system 21 | dependencies: [] 22 | -------------------------------------------------------------------------------- /tasks/main.yml: -------------------------------------------------------------------------------- 1 | --- 2 | # This role installs and sets up keepalived 3 | 4 | - name: Install keepalived 5 | package: 6 | name: keepalived 7 | state: latest 8 | tags: keepalived 9 | notify: restart keepalived 10 | 11 | - when: keepalived_notifications_email | default(False) 12 | block: 13 | - name: Install postfix to send notifications 14 | package: 15 | name: ['postfix', 'mailutils'] 16 | state: present 17 | 18 | - name: Start and enable postfix 19 | service: 20 | name: postfix 21 | state: started 22 | enabled: yes 23 | 24 | 25 | - name: Install check script 26 | template: 27 | src: "templates/{{ keepalived_check_script_name }}.sh.j2" 28 | dest: "/etc/keepalived/{{ keepalived_check_script_name }}.sh" 29 | mode: 0755 30 | owner: root 31 | group: root 32 | tags: keepalived 33 | notify: restart keepalived 34 | 35 | - name: Install email notification script 36 | template: 37 | src: "templates/email_notify.sh.j2" 38 | dest: "/etc/keepalived/email_notify.sh" 39 | mode: 0755 40 | owner: root 41 | group: root 42 | tags: keepalived 43 | notify: restart keepalived 44 | 45 | - name: Keepalived configuration 46 | template: 47 | src: keepalived.conf.j2 48 | dest: /etc/keepalived/keepalived.conf 49 | tags: keepalived 50 | notify: restart keepalived 51 | 52 | - name: Start keepalived 53 | service: 54 | name: keepalived 55 | state: started 56 | enabled: yes 57 | tags: keepalived 58 | -------------------------------------------------------------------------------- /templates/check_script.sh.j2: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | pkill -0 {{ keepalived_check_process }} 3 | -------------------------------------------------------------------------------- /templates/email_notify.sh.j2: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | echo "Keepalived state change! $1 $2 now has state $3" | wall 4 | echo "Keepalived on $HOSTNAME changed state! $1 $2 now has state $3" | mail -s '[LOADBALANCER] Keepalived state change' {{ keepalived_notifications_email | default('root@localhost') }} 5 | 6 | -------------------------------------------------------------------------------- /templates/haproxy_check_script.sh.j2: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | CSV=`curl "http://{{ haproxy_webstats_auth }}@{{ haproxy_webstats_bind | regex_replace('/0\.0\.0\.0/127.0.0.1') }}/;csv" 2>/dev/null` 4 | 5 | num_frontends=`echo "$CSV"|grep FRONTEND|grep ,OPEN,|wc -l` 6 | num_backends=`echo "$CSV"|grep BACKEND|grep ,UP,|wc -l` 7 | 8 | if [ $num_frontends -lt 1 ] || [ $num_backends -lt 1 ]; then 9 | echo "$num_frontends frontends, $num_backends backends, problems!" 10 | exit 1 11 | fi 12 | 13 | -------------------------------------------------------------------------------- /templates/keepalived.conf.j2: -------------------------------------------------------------------------------- 1 | ! Configuration File for keepalived 2 | global_defs { 3 | enable_script_security 4 | script_user root 5 | } 6 | vrrp_script chk_service { # Requires keepalived-1.1.13 7 | script /etc/keepalived/{{ keepalived_check_script_name }}.sh 8 | interval 2 # check every 2 seconds 9 | } 10 | vrrp_instance VI_1 { 11 | state {{ keepalived_role }} 12 | interface {{ keepalived_shared_iface }} 13 | virtual_router_id {{ keepalived_router_id }} 14 | {% if keepalived_role.lower() == "master" %} 15 | priority {{ keepalived_priority }} 16 | {% else %} 17 | priority {{ keepalived_backup_priority }} 18 | {% endif %} 19 | advert_int 1 20 | {% if keepalived_unicast_mode | default(False) %} 21 | unicast_src_ip {{ keepalived_unicast_source }} 22 | unicast_peer { 23 | {% for peer in keepalived_unicast_peers %} 24 | {{ peer }} 25 | {% endfor %} 26 | } 27 | {% endif %} 28 | authentication { 29 | auth_type PASS 30 | auth_pass {{ keepalived_auth_pass }} 31 | } 32 | virtual_ipaddress { 33 | {% if keepalived_shared_ip | default(False) %} 34 | {{ keepalived_shared_ip }} dev {{ keepalived_shared_iface }} 35 | {% else %} 36 | {% for ip in keepalived_shared_ips | default([]) %} 37 | {{ ip }} dev {{ keepalived_shared_iface }} 38 | {% endfor %} 39 | {% endif %} 40 | } 41 | track_script { 42 | chk_service 43 | } 44 | {% if keepalived_notification_email | default(False) %} 45 | notify /etc/keepalived/email_notify.sh 46 | {% endif %} 47 | {% if keepalived_notification_script | default(False) %} 48 | notify {{ keepalived_notification_script }} 49 | {% endif %} 50 | {% if keepalived_notification_command_backup | default(False) %} 51 | notify_backup "{{ keepalived_notification_command_backup }}" 52 | {% endif %} 53 | {% if keepalived_notification_command_master | default(False) %} 54 | notify_master "{{ keepalived_notification_command_master }}" 55 | {% endif %} 56 | {% if keepalived_notification_command_fault | default(False) %} 57 | notify_fault "{{ keepalived_notification_command_fault }}" 58 | {% endif %} 59 | } 60 | -------------------------------------------------------------------------------- /templates/service_check_script.sh.j2: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | systemctl status {{ keepalived_check_service }} > /dev/null 4 | -------------------------------------------------------------------------------- /test/Vagrantfile: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | # vi: set ft=ruby : 3 | 4 | # Sample vagrantfile to create 2 hosts, Centos based and test keepalived is really intalled. 5 | # VM's start with 2 interface. The usual NAT interface (eth0) for management and a "private network" 6 | # so the two VM can "see" each other. 7 | 8 | # You just have to change the "keepalived_shared_ip" depending on which IP network you have 9 | # configured in your private network 10 | 11 | # Vagrantfile API/syntax version. Don't touch unless you know what you're doing! 12 | VAGRANTFILE_API_VERSION = "2" 13 | 14 | Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| 15 | config.vm.box = "ubuntu/trusty64" 16 | config.vm.network "private_network", type: "dhcp" 17 | 18 | 19 | 20 | config.vm.define "master" do |master| 21 | master.vm.hostname = "master" 22 | config.vm.provision "ansible" do |ansible| 23 | ansible.playbook = "playbook.yml" 24 | ansible.extra_vars ={ keepalived_role: "master", 25 | keepalived_shared_iface: "eth1", 26 | keepalived_shared_ip: "172.28.128.100" } 27 | end 28 | 29 | end 30 | 31 | config.vm.define "slave" do |slave| 32 | slave.vm.hostname = "slave" 33 | config.vm.provision "ansible" do |ansible| 34 | ansible.playbook = "playbook.yml" 35 | ansible.extra_vars ={keepalived_role: "slave", 36 | keepalived_shared_iface: "eth1", 37 | keepalived_shared_ip: "172.28.128.100" } 38 | 39 | end 40 | 41 | end 42 | 43 | 44 | 45 | end 46 | -------------------------------------------------------------------------------- /test/Vagrantfile.Debian: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | # vi: set ft=ruby : 3 | 4 | # Sample vagrantfile to create 2 hosts, Ubuntu based and test keepalived is really intalled. 5 | # VM's start with 2 interface. The usual NAT interface (eth0) for management and a "private network" 6 | # so the two VM can "see" each other. 7 | 8 | # You just have to change the "keepalived_shared_ip" depending on which IP network you have 9 | # configured in your private network 10 | 11 | # Vagrantfile API/syntax version. Don't touch unless you know what you're doing! 12 | VAGRANTFILE_API_VERSION = "2" 13 | 14 | Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| 15 | config.vm.box = "ubuntu/trusty64" 16 | config.vm.network "private_network", type: "dhcp" 17 | 18 | 19 | 20 | config.vm.define "master" do |master| 21 | master.vm.hostname = "master" 22 | config.vm.provision "ansible" do |ansible| 23 | ansible.playbook = "playbook.yml" 24 | ansible.extra_vars ={ keepalived_role: "master", 25 | keepalived_shared_iface: "eth1", 26 | keepalived_shared_ip: "172.28.128.100" } 27 | end 28 | 29 | end 30 | 31 | config.vm.define "slave" do |slave| 32 | slave.vm.hostname = "slave" 33 | config.vm.provision "ansible" do |ansible| 34 | ansible.playbook = "playbook.yml" 35 | ansible.extra_vars ={keepalived_role: "slave", 36 | keepalived_shared_iface: "eth1", 37 | keepalived_shared_ip: "172.28.128.100" } 38 | 39 | end 40 | 41 | end 42 | 43 | 44 | 45 | end 46 | -------------------------------------------------------------------------------- /test/Vagrantfile.RedHat: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | # vi: set ft=ruby : 3 | 4 | # Sample vagrantfile to create 2 hosts, Centos based and test keepalived is really intalled. 5 | # VM's start with 2 interface. The usual NAT interface (eth0) for management and a "private network" 6 | # so the two VM can "see" each other. 7 | 8 | # You just have to change the "keepalived_shared_ip" depending on which IP network you have 9 | # configured in your private network 10 | 11 | # Vagrantfile API/syntax version. Don't touch unless you know what you're doing! 12 | VAGRANTFILE_API_VERSION = "2" 13 | 14 | Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| 15 | config.vm.box = "rafacas/centos64-i386-plain" 16 | config.vm.network "private_network", type: "dhcp" 17 | 18 | 19 | 20 | config.vm.define "master" do |master| 21 | master.vm.hostname = "master" 22 | config.vm.provision "ansible" do |ansible| 23 | ansible.playbook = "playbook.yml" 24 | ansible.extra_vars ={ keepalived_role: "master", 25 | keepalived_shared_iface: "eth1", 26 | keepalived_shared_ip: "172.28.128.100" } 27 | end 28 | 29 | end 30 | 31 | config.vm.define "slave" do |slave| 32 | slave.vm.hostname = "slave" 33 | config.vm.provision "ansible" do |ansible| 34 | ansible.playbook = "playbook.yml" 35 | ansible.extra_vars ={keepalived_role: "slave", 36 | keepalived_shared_iface: "eth1", 37 | keepalived_shared_ip: "172.28.128.100" } 38 | 39 | end 40 | 41 | end 42 | 43 | 44 | 45 | end 46 | -------------------------------------------------------------------------------- /test/playbook.yml: -------------------------------------------------------------------------------- 1 | --- 2 | # This playbook deploys the whole application stack in this site. 3 | 4 | - name: apply common configuration to all nodes 5 | hosts: all 6 | user: vagrant 7 | sudo: true 8 | roles: 9 | - ansible-keepalived 10 | --------------------------------------------------------------------------------