Rolling upgrade of multiple groups, one group at a time

[ArseniyBelorukov]

Nomad version

0.7.1

Operating system and Environment details

Linux / SUSE Linux Enterprise Server 12 SP2

Issue

I have job with 3 multiple groups and max_parallel=1 on job level.
I change version of docker image in each group and 'nomad plan' it.
All group have "forces create/destroy update" and they are updated in one time.
Can I change this behaviour?

Expected behaviour:
Multiple groups will be updated one-by-one.

Observed behaviour:
Multiple groups are updated in one time.

Job file (if appropriate)

attach
myservice.nomad.txt

[shantanugadgil]

I think your are asking for inter-group dependency within a job?
I don't think this is doable for now.

Similar issues already exist, example: #419

There is a concept of a "leader task", if that helps you:
https://www.nomadproject.io/docs/job-specification/task.html#leader

For my use-case I separate my groups/tasks as separate jobs.

Regards,
Shantanu

[ArseniyBelorukov]

@shantanugadgil thanks for answer.
I want something like in #3748

[chelseakomlo]

Thanks for the question- we'll track this issue in #419. See the recommended workaround in #3748 in the short term.

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