Syntax around FILTER_SERVICES

[pascalandy]

Hi,

I want to have shepherd to update only two services. I don't understand the syntax around label for shepherd. I do use labels as you can see.

I think the docs should be more specific around this.
Thank you!

cmd for shepherd

docker service create \
  --name "$CTN_shepherd" --hostname "$CTN_shepherd" \
  --replicas "1" \
  --constraint "node.role==manager" \
  --restart-condition "on-failure" \
  --limit-cpu "0.1" \
  --limit-memory "16M" \
  --env SLEEP_TIME="1m" \
  --env FILTER_SERVICES="10000013-edge-ghost,10000014-stable-ghost" \
  --mount type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock,ro \
  --mount type=bind,source=/root/.docker/config.json,target=/root/.docker/config.json,ro \
  ${IMG_shepherd}

error for shepherd

root@hulu1:~/deploy-setup# docker service logs -f tool-shepherd
tool-shepherd.1.nbh559jelcqo@hulu2    | Wed Dec 16 10:15:39 EST 2020 Timezone set to US/Eastern
tool-shepherd.1.nbh559jelcqo@hulu2    | Wed Dec 16 10:15:46 EST 2020 Enabling synchronous service updates
tool-shepherd.1.nbh559jelcqo@hulu2    | invalid argument "10000013-edge-ghost,10000014-stable-ghost" for "-f, --filter" flag: bad format of filter (expected name=value)
tool-shepherd.1.nbh559jelcqo@hulu2    | See 'docker service ls --help'.
tool-shepherd.1.nbh559jelcqo@hulu2    | Wed Dec 16 10:15:55 EST 2020 Sleeping 1m before next update

inspect my app

docker service inspect --pretty 10000013-edge-ghost

(...)
ID:		3vgh3inten0myykdlgfkbbkx3
Name:		10000013-edge-ghost
Labels:
 traefik.backend=10000013-edge-ghost
 traefik.backend.loadbalancer.method=drr
 traefik.backend.loadbalancer.swarm=true
 traefik.docker.network=ntw_front
 traefik.enable=true
 traefik.frontend.entryPoints=http,https
 traefik.frontend.priority=100
 traefik.frontend.redirect.entryPoint=https
 traefik.frontend.redirect.permanent=true
 traefik.frontend.rule=Host:trial.firepress.link;PathPrefix:/edge
 traefik.passHostHeader=true
 traefik.port=2368
 traefik.weight=10
Service Mode:	Replicated
 Replicas:	1
 
(...)

[djmaze]

Well, the syntax is that of a single filter option for docker service ls.

That means in your case you could use FILTER_SERVICES=label=traefik.backend=10000013-edge-ghost in order to match one of the services.

Adding multiple filters is currently not supported. As a workaround, you could add an additional label to each of those services called shepherd=1 (or similar) and then use FILTER_SERVICES=label=shepherd in order to match all of them.

You are right the documentation should be improved here.

[stale]

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