I have a 2 docker containers "restorecms_facade_1" (facade service) and "restorecms_identity_1" (identity service) running on same bridge "restorecms_default".
I have specified the host name as 'hostname: identity-srv' for identity service image in my docker compose file
The facade service has 5000 port exposed and it accepts my graphQL request. This facade service will delegate the request to identity service ( dns name 'identity-srv') running on port 50051 but the request is currently timing out on facade service.
My docker container and bride network details are below.
I cannot even ping from facade service to identity service (but the other way around is possible).
Am I missing something here or do I need to add anything on facade service so that the connection goes through to identity service ?
Docker ps:
akumar@client3 /restore $ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4a8854ce4876 xxx/facade-srv "node lib/index.js" 41 minutes ago Up 41 minutes 0.0.0.0:5000->5000/tcp restorecms_facade_1
00f1f00ae2a6 xxx/identity-srv "node service.js" 41 minutes ago Up 41 minutes (healthy) 0.0.0.0:50051->50051/tcp restorecms_identity_1
Docker inspect:
akumar@client3 /restore/identity-srv-TypeScript $ docker inspect restorecms_default
[
{
"Name": "restorecms_default",
"Id": "102358eab67884f7d39b78fd0bcf1050499d3dc667eddab5e15086633185837d",
"Created": "2017-06-08T10:40:59.672964582+02:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.18.0.0/16",
"Gateway": "172.18.0.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"Containers": {
"00f1f00ae2a64f489a530a63a9fb57711618d5e67769b739db514b5f20b73d36": {
"Name": "restorecms_identity_1",
"EndpointID": "d005cdff65479817bf769e4b60a18769c40d9d9cae396f3c735c2e497d6e08a4",
"MacAddress": "02:42:ac:12:00:09",
"IPv4Address": "172.18.0.9/16",
"IPv6Address": ""
},
"4a8854ce487698149072c224378f697e9309e32649f6010d2d8c4cc4f0bb3f42": {
"Name": "restorecms_facade_1",
"EndpointID": "2509c8e1444d27cbe8a3188412fcbfb1aab103ec2366c22f3ad614c684ef87ab",
"MacAddress": "02:42:ac:12:00:0a",
"IPv4Address": "172.18.0.10/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "restorecms"
}
}
]
Hostnames and ping:
root@identity-srv:/# cat /etc/hostname
identity-srv
root@identity-srv:/# ping 4a8854ce4876
PING 4a8854ce4876 (172.18.0.10): 48 data bytes
56 bytes from 172.18.0.10: icmp_seq=0 ttl=64 time=0.241 ms
56 bytes from 172.18.0.10: icmp_seq=1 ttl=64 time=0.149 ms
56 bytes from 172.18.0.10: icmp_seq=2 ttl=64 time=0.165 ms
^C--- 4a8854ce4876 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.149/0.185/0.241/0.040 ms
root@4a8854ce4876:/# cat /etc/hostname
4a8854ce4876
root@4a8854ce4876:/# ping identity-srv
ping: unknown host
My current docker-compose.yml (for identity and facade service) config are below:
identity:
hostname: identity-srv
image: xxx/identity-srv
ports:
- "50051:50051"
depends_on:
arangodb:
condition: service_healthy
links:
- arangodb
- kafka
healthcheck:
test: "exit 0"
# Facade service
facade:
image: xxx/facade-srv
ports:
- "5000:5000"
depends_on:
identity:
condition: service_healthy
#resource:
# condition: service_healthy
links:
- identity
- kafka
- elasticsearch
- arangodb
- redis
Hostname only sets hostname "inside" the container. If you want to ping it from another one you need to use alias (default to service name) which you used in your links section.
ping identity
if you want use identity-srv you can use links this way:
...
links:
- identity:identity-srv
...