"Trying to map ports but no network interface is available"
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Stefan Smith
Nov 21, 2015, 8:08:56 PM11/21/15
to Nomad
Hi,
When I POST the below JSON to /v1/jobs, the container fails to start and /var/log/messages contains the following lines:
Nov 22 01:01:17 localhost nomad: 2015/11/22 01:01:17 [DEBUG] driver.docker: networking mode not specified; defaulting to bridge
Nov 22 01:01:17 localhost nomad: 2015/11/22 01:01:17 [DEBUG] driver.docker: No network interfaces are available
Nov 22 01:01:17 localhost nomad: 2015/11/22 01:01:17 [ERR] driver.docker: failed to create container configuration for image registry:2: Trying to map ports but no network interface is available
Nov 22 01:01:17 localhost nomad: 2015/11/22 01:01:17 [ERR] client: failed to start task 'docker-registry-2' for alloc 'b9b26630-7a08-d246-ec90-bd576e892f09': Failed to create container configuration for image registry:2: Trying to map ports but no network interface is available
If I omit the "port_map" property from the task config, the container starts fine. Any idea what's going on?
Cheers,
Stef
{
"Job": {
"ID" : "docker-registry-2",
"Region" : "global",
"Type" : "service",
"Priority" : 1,
"Datacenters": [
"dc1"
],
"Name": "docker-registry-2",
"TaskGroups": [
{
"Count" : 1,
"Name": "docker-registry-2",
"RestartPolicy" : {
"Attempts" : 10
},
"Tasks": [
{
"Name": "docker-registry-2",
"Driver": "docker",
"Port" : {
"http" : {
"static" : 5000
}
},
"Service": {
"Port": "http"
},
"Config": {
"image": "registry:2",
"port_map" : [{ "http" : 5000 }]
},
"Resources": {
"CPU" : 500,
"MemoryMB" : 128,
"DiskMB" : 0,
"Network": {
"MBits" : 100,
"Reserved_Ports": [
"5000"
]
}
}
}
]
}
]
}
}
Diptanu Choudhury
Nov 26, 2015, 11:37:03 PM11/26/15
to Stefan Smith, Nomad
Hi Stefan,
The json you're posting is incorrect. The port mapping section goes into the driver config now. I have already responded to your other email with the correct json, but in case this comes up in a web search for someone else trying to debug the same issue, here is the correct json -
"Tasks": [
{
"Name": "docker-registry-2",
"Driver": "docker",
"Port" : {
"http" : {
"static" : 5000
}
},
"Services": [
{
"Name": "${BASE}-foo",
"PortLabel": "http"
}
],
"Config": {
"image": "registry:2"
},
"Resources": {
"CPU" : 500,
"MemoryMB" : 128,
"DiskMB" : 0,
"Networks": [
{
"ReservedPorts": [
{
"Label": "http",
"Value": 5000
}
]
}
]
}
}
]
Hope this helps, and please let us know if you face any other issue with port forwarding!
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Thanks,
Diptanu Choudhury
Diptanu Choudhury
Web - www.linkedin.com/in/diptanu
Twitter - @diptanu
Stefan Smith
Nov 30, 2015, 9:01:39 AM11/30/15
to Nomad
As mentioned in the other thread, this worked for me. Thanks.
Stef
Calvin Leung Huang
Jan 5, 2016, 5:38:50 PM1/5/16
to Nomad
Stefan,
Thanks for posting the config up, it helped me get unblocked from issues I was having with the API. One quick question though, why did you use ReservedPort instead of DynamicPort? Is it because you wanted the 1:1 mapping? Doesn't that restrict the service to only be able to run one copy on that host?
- Calvin
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