template variables not parsed in docker-compose.yml with docker swarm on docker v17.05.0-ce #33364
Comments
al-sabr
changed the title
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This is expected; not all options accept a template. From the section in the documentation you referred to ; Create services using templatesYou can use templates for some flags of The supported flags are the following :
So the I'll close this issue, because it's not a bug, but feel free to comment after I closed 👍 |
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I don't agree with closing this ticket... If the template variables are usable in docker service create it should also be valid inside of a docker-compose.yml and docker stack deploy -c docker-compose.yml since it is just a wrapper around docker create service. Reopen this ticket please. |
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@gdeverlant your docker-compose file uses a template in the command. See the linked documentation; it is not supported in |
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It should be because some services need numbers incremented automatically with the name of each node. This is a use case where DB clustering systems have to statically name each node's name and so on. |
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Any feedback ????? |
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As mentioned, it's not currently supported; having said that, have you considered using |
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I don't know how this is working with the command and template variable ... Does your solution work for each node with its dynamic template variable value ? Do you have any example so that I can try ? |
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You can template an environment-variable and use that, e.g.; docker service create \
--env "SERVICE_NAME={{.Service.Name}}" \
--name helloworld \
alpine /bin/sh -c 'echo $SERVICE_NAME'Or in your case probably this will work (untested); docker service create \
--name=coordinator \
--env "SERVICE_NAME={{.Service.Name}}" \
arangodb/arangodb /bin/sh -c 'arangod --server.authentication=false --server.endpoint tcp://0.0.0.0:8529 --cluster.my-address tcp://${SERVICE_NAME}:8529 --cluster.my-local-info ${SERVICE_NAME} --cluster.my-role COORDINATOR --cluster.agency-endpoint tcp://agency:8529 --log.file /var/log/arangodb3/arangod.log' |
Description
It seems also that the templates are not working in docker stack deploy and docker-compose.yml
https://github.com/moby/moby/blob/master/docs/reference/commandline/service_create.md#create-services-using-templates
Found this bug while finding #33338
Steps to reproduce the issue:
Describe the results you received:
This is the error log of the servers :
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Additional information you deem important (e.g. issue happens only occasionally):
Output of
docker version:Manager host
Output of
docker info:Manager host
Additional environment details (AWS, VirtualBox, physical, etc.):
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