├── README.md
├── install-keepalived.sh
├── check-node-swarm-status.sh
└── keepalived.conf


/README.md:
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1 | # docker-swarm-configure-keepalived
2 | Configure keepalived floating ip for docker swarm
3 | 


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/install-keepalived.sh:
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1 | #!/usr/bin/env bash
2 | 
3 | apt-get update
4 | apt-get install -y keepalived
5 | 


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/check-node-swarm-status.sh:
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 1 | #!/usr/bin/env bash
 2 | dockerid="$(docker info | grep -i "nodeid:" | awk -F ':' '{print $2}' | sed -e 's/^[[:space:]]*//')"
 3 | echo "Docker id: $dockerid"
 4 | 
 5 | status="$(docker node list | grep -i $dockerid | awk -F ' ' '{print $5}')"
 6 | echo "Status: $status"
 7 | 
 8 | active="active"
 9 | shopt -s nocasematch
10 | case "$status" in
11 |  $active ) ecode=0 ;;
12 |  *) ecode=1 ;;
13 | esac
14 | 
15 | echo "exiting with $ecode"
16 | exit $ecode
17 | 


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/keepalived.conf:
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 1 | vrrp_script chk_docker {
 2 |         script "/usr/bin/killall -0 dockerd"
 3 |         interval 2
 4 |         fall 2
 5 |         rise 2
 6 | }
 7 | 
 8 | vrrp_script chk_docker_swarm_status {
 9 |         script "/bin/bash /etc/keepalived/check-node-swarm-status.sh"
10 |         interval 2
11 |         fall 2
12 |         rise 2
13 | }
14 | 
15 | 
16 | vrrp_instance VI_104 {
17 |         state EQUAL
18 | 
19 |         interface {{ethernet_adapter_name_for_cluster}}
20 |         virtual_router_id 104
21 |         priority 100
22 |         unicast_src_ip {{this_node_ip}}
23 |         unicast_peer {
24 |                 {{node_3_ip}}
25 |                 {{node_3_ip}
26 |         }
27 | 
28 |         authentication {
29 |                 auth_type PASS
30 |                 auth_pass {{password_8_chars_max}}
31 |        }
32 |         virtual_ipaddress {
33 |                 {{floating_ip}}/{{floating_ip_mask}} dev {{ethernet_adapter_for_floating_ip}}
34 |         }
35 |         track_script {
36 |                 chk_docker
37 |                 chk_docker_swarm_status
38 |         }
39 | }
40 | 


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