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Docker SwarmÊÇÒ»¸öÈÝÆ÷±àÅŹ¤¾ß£¬¿ÉÒÔÈÃÎÒÃÇÇáËɵØÖÎÀí¶à¸öDockerÈÝÆ÷¡£Ê×ÏÈ£¬ÎÒÃÇÐèÒª´î½¨Ò»¸öDocker Swarm¼¯Èº£¬ÒÔÏÂÊǼòÆӵİ취£º

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$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh
$ sudo usermod -aG docker your-user
$ docker swarm init --advertise-addr your-ip

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$ docker swarm join --token your-token your-ip

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$ docker network create --driver overlay my-network

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$ docker service create --replicas 3 --network my-network --name my-service nginx

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³ýÁËʹÓÃDocker Swarm£¬ÎÒÃÇ»¹¿ÉÒÔʹÓÃKeepalivedʵÏÖÈÝÆ÷ÍøÂçµÄ¹ÊÕÏÇл»¡£KeepalivedÊÇÒ»ÖÖÓÃÓڸ߿ÉÓÃÐÔµÄÈí¼þ£¬¿ÉÒÔÈ·±£Ö÷»úµÄ¿ÉÓÃÐÔ¡£ÒÔÏÂÊÇ°ì·¨£º

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ÔÚÿ¸ö½ÚµãÉϽ¨ÉèÒ»¸öKeepalivedµÄÉèÖÃÎļþ£¬Ê¾ÀýÈçÏ£¨ÎļþÃûΪkeepalived.conf£©£º

vrrp_script chk_docker {
    script   "docker service ls | grep my-service"
    interval 5
}
vrrp_instance VI_1 {
    interface eth0
    state MASTER
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass my-password
    }
    virtual_ipaddress {
        10.0.0.100
    }
    track_script {
        chk_docker
    }
}

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³ýÁËʹÓÃDocker SwarmºÍKeepalived£¬ÎÒÃÇ»¹¿ÉÒÔʹÓÃNginx×÷ΪÈÝÆ÷ÍøÂçµÄ¸ºÔØƽºâÆ÷¡£ÒÔÏÂÊÇ°ì·¨£º

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http {
    upstream my-service {
        server 10.0.0.1:80;
        server 10.0.0.2:80;
        server 10.0.0.3:80;
    }
    server {
        listen 80;
        location / {
            proxy_pass http://my-service;
        }
    }
}

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