Is it possible with docker engine in swarm mode to update the published port of a service? The docker service update command help says:
–publish-add value Add or update a published port (default [])
But when I try it it doesn’t update the published port, it adds a new one as in this example:
$ docker service create --name=web --publish 7070:80 nginx
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$ docker service inspect web
"Ports": [
{
“Protocol”: “tcp”,
“TargetPort”: 80,
“PublishedPort”: 7070
}
],
$ docker service update --publish-add 7080:80 web
web
$ docker service inspect web
"Ports": [
{
“Protocol”: “tcp”,
“TargetPort”: 80,
“PublishedPort”: 7070
},
{
“Protocol”: “tcp”,
“TargetPort”: 80,
“PublishedPort”: 7080
}
],
And the service is reachable at both 7070 and 7080 ports, while I was expecting the published port 7070 to be removed and 7080 to be added.
I tested this with docker 1.12.3 on debian jessie.