Hai semuanya di materi kali ini kita akan membahas lebih detail tentang specify custom network di compose file.

Instead of just using the default app network, you can specify your own networks with the top-level networks key. This lets you create more complex topologies and specify custom network drivers and options. You can also use it to connect services to externally-created networks which aren’t managed by Compose.

Each service can specify what networks to connect to with the service-level networks key, which is a list of names referencing entries under the top-level networks key.

Here’s an example Compose file defining two custom networks. The proxy service is isolated from the mysql service, because they do not share a network in common - only workpress can talk to both.

Dan berikut adalah file wordpress-proxy.nginx.template.conf yang di simpan dalam folder nginx seperti berikut:

Jika dijalankan maka hasilnya seperti berikut:

➜ docker  docker-compose -f .\09-docker-compose\network\specify\docker-compose.yaml -p specify-net up -d
Creating volume "specify-net_mysql_data" with default driver
Creating specify-net_mysql_1     ... done
Creating specify-net_wordpress_1 ... done
Creating specify-net_proxy_1     ... done

➜ docker  docker-compose -f .\09-docker-compose\network\specify\docker-compose.yaml -p specify-net ps
         Name                        Command               State                Ports
---------------------------------------------------------------------------------------------------
specify-net_mysql_1       docker-entrypoint.sh mysqld      Up      3306/tcp, 33060/tcp
specify-net_proxy_1       /docker-entrypoint.sh ngin ...   Up      0.0.0.0:80->80/tcp,:::80->80/tcp
specify-net_wordpress_1   docker-entrypoint.sh apach ...   Up      80/tcp

docker container inspect $(docker-compose -f .\09-docker-compose\network\specify\docker-compose.yaml -p specify-net ps -q) -f '{{.Name}} => {{json .NetworkSettings.Networks}}'
/specify-net_mysql_1 => {
   "specify-net_backend":{
      "Aliases":[
         "34e0a0d75272",
         "mysql"
      ],
      "NetworkID":"f4c208b1cb2203c39a83d5b50fb295ed991ed5d5f7069bd87a383bd2525e30da",
      "EndpointID":"ec3ad3aabe51d5b60728bc86fae9b415383eed9295724244305b71bc68aec4bb",
      "Gateway":"172.23.0.1",
      "IPAddress":"172.23.0.2",
      "IPPrefixLen":16,
      "MacAddress":"02:42:ac:17:00:02"
   }
}
/specify-net_proxy_1 => {
   "specify-net_frontend":{
      "Aliases":[
         "proxy",
         "5298737da335"
      ],
      "Gateway":"172.24.0.1",
      "IPAddress":"172.24.0.3",
      "IPPrefixLen":16,
      "MacAddress":"02:42:ac:18:00:03"
   }
}
/specify-net_wordpress_1 => {
   "specify-net_backend":{
      "Aliases":[
         "wordpress",
         "f73d5704d113"
      ],
      "Gateway":"172.23.0.1",
      "IPAddress":"172.23.0.3",
      "IPPrefixLen":16,
      "MacAddress":"02:42:ac:17:00:03"
   },
   "specify-net_frontend":{
     "Aliases":[
         "wordpress",
         "f73d5704d113"
      ],
      "Gateway":"172.24.0.1",
      "IPAddress":"172.24.0.2",
      "IPPrefixLen":16,
      "MacAddress":"02:42:ac:18:00:02"
   }
}

➜ docker  docker network inspect $(docker network ls -f label=com.docker.compose.project=specify-net -q) -f '{{.Name}} => {{json .Containers}}'
specify-net_backend => {
   "34e0a0d7527219b679a861818b3e8805990046a098dbff31201fb328b048fe8d":{
      "Name":"specify-net_mysql_1",
      "EndpointID":"ec3ad3aabe51d5b60728bc86fae9b415383eed9295724244305b71bc68aec4bb",
      "MacAddress":"02:42:ac:17:00:02",
      "IPv4Address":"172.23.0.2/16",
      "IPv6Address":""
   },
   "f73d5704d11395e4520d08e59a2b3b24008b2a821daf6cf7f1c2275ea8095e39":{
      "Name":"specify-net_wordpress_1",
      "EndpointID":"a3bde3db75fa2c1e4bd8aac6b9f115287fd1fcf9d0351a97d954220152f9c206",
      "MacAddress":"02:42:ac:17:00:03",
      "IPv4Address":"172.23.0.3/16",
      "IPv6Address":""
   }
}
specify-net_frontend => {
   "5298737da335d3365410d920d3f1472b18f88b7abebec2c24b717335a8dd26c2":{
      "Name":"specify-net_proxy_1",
      "EndpointID":"b33b9a75483defd04d5c636ba2d25850cbf0740b813838674dc66e58532376a3",
      "MacAddress":"02:42:ac:18:00:03",
      "IPv4Address":"172.24.0.3/16",
      "IPv6Address":""
   },
   "f73d5704d11395e4520d08e59a2b3b24008b2a821daf6cf7f1c2275ea8095e39":{
      "Name":"specify-net_wordpress_1",
      "EndpointID":"4f8507ad779853851422bc6bf0d36ccff539b8a089e12d2857ba76824342f98f",
      "MacAddress":"02:42:ac:18:00:02",
      "IPv4Address":"172.24.0.2/16",
      "IPv6Address":""
   }
}