docker + consul

• consul-server1

docker run -p 8500:8500 \
     -v /Users/xx/Documents/docker/consul/consul_server1/data:/consul/data \
     -e CONSUL_BIND_INTERFACE='eth0' \
     --name=consul-server1 \
     --hostname=consul-server1 \
     consul agent \
     -server \
     -bootstrap-expect=1 \
     -node=consul-server1 \
     -data-dir=/consul/data \
     -client 0.0.0.0 \
     -ui

• consul-server2

docker run \
     -v /Users/xx/Documents/docker/consul/consul_server2/data:/consul/data \
     -e CONSUL_BIND_INTERFACE='eth0' \
     --name=consul-server2 \
     --hostname=consul-server2 \
     consul agent \
     -server \
     -bootstrap-expect=1 \
     -node=consul-server2 \
     -data-dir=/consul/data \
     -client 0.0.0.0 \
     -ui \
     -join 172.17.0.2

• --name docker容器名称

• --hostname docker容器hostname

• agent 表示启动 Agent 进程。

• -server 表示启动 Consul Server 模式。

• -client 表示启动 Consul Cilent 模式。0.0.0.0 表示所有地址都可以访问。

• -bootstrap 表示这个节点是 Server-Leader ，每个数据中心只能运行一台服务器。技术角度上讲 Leader 是通过 Raft 算法选举的，但是集群第一次启动时需要一个引导 Leader，在引导群集后，建议不要使用此标志。

• -bootstrap-expect=2 当 server 数量达到 3 个之前 consul 是不会引导集群的，当然也不会选出某一个 leader

• -ui 表示启动 Web UI 管理器，默认开放端口 8500，所以上面使用 Docker 命令把 8500 端口对外开放。

• -node 节点的名称，集群中必须是唯一的。

• -join 表示加入到某一个集群中去。 如：-join=192.168.1.23

cd C:\develop\microservice\consul_server1

consul agent ^
-server ^
-bootstrap ^
-node=consul-server1 ^
-data-dir=.\data ^
-config-dir=.\conf ^
-client=0.0.0.0 ^
-ui

cd C:\develop\microservice\consul_server2

consul agent ^
-server ^
-node=consul-server2 ^
-data-dir=.\data ^
-config-dir=.\conf ^
-client=0.0.0.0 ^
-ui ^
-join 127.0.0.1:8301 ^

{
    "ports": {
        "dns": 8600,
        "http": 8500,
        "https": -1,
        "grpc": 8502,
        "serf_lan": 8301,
        "serf_wan": 8302,
        "server": 8300
    },
    "services": [
        {
            "checks": [
                {
                    "tcp": ":8081",
                    "interval": "5s",
                    "timeout": "1s"
                }
            ],
            "id": "api_server1",
            "name": "api_server",
            "port": 8081,
            "tags": ["urlprefix-/greeting"]
        },
        {
            "checks": [
                {
                    "tcp": ":8082",
                    "interval": "5s",
                    "timeout": "1s"
                }
            ],
            "id": "api_server2",
            "name": "api_server",
            "port": 8082,
            "tags": ["urlprefix-/greeting"]
        }
    ]
}

job "api_server" {
    datacenters = ["dc1"]
    type = "service"

    group "api_server" {
        count = 1
        
        task "api_server1" {
            driver = "java"

            config {
                jar_path = "C:\\develop\\microservice\\repo\\springboot-sample-0.1.0.jar"
                jvm_options = [
                    "-Dserver.port=8081",
                    "-Dapp.consul.discovery.service-name=api_server",
                    "-Dapp.consul.discovery.service-id=api_server1"
                ]
            }

            resources {
                cpu = 500
                memory = 256
                network {
                    mbits = 10
                    port "http" {
                        static = 8081
                    }
                }
            }

            service {
                name = "api-1"
                tags = ["urlprefix-/greeting"]
                port = "http"

                meta {
                    meta = "meta for api_server1."
                }

                check {
                    type = "tcp"
                    port = "http"
                    interval = "10s"
                    timeout  = "2s"
                }
            }
        }

        restart {
            attempts = 1
        }
    }
}

sudo docker run -p 8081:8081 \
-e PARAMS="-Dserver.port=8081 -Dapp.consul.discovery.enable=true -Dapp.consul.discovery.consul-host=172.17.0.2:8500 -Dapp.consul.discovery.service-id=service-A-1" \
service_a:0.1.0

sudo docker build -f Dockerfile-A-0.1.0 -t service_a:0.1.0 .

FROM nexus.jp.sbibits.com:8442/amazoncorretto:11.0.5
ADD springboot-sample-0.1.0.jar springboot-sample.jar

ENV PARAMS=""
ENTRYPOINT ["sh","-c","java $PARAMS -jar springboot-sample.jar"]