consul/connect: interpolate connect block #9586
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TODO
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This PR enables job submitters to use interpolation in the connect block of jobs making use of consul connect. Before, only the name of the connect service would be interpolated, and only for a few select identifiers related to the job itself (#6853). Now, all connect fields can be interpolated using the full spectrum of runtime parameters. Note that the service name is interpolated at job-submission time, and cannot make use of values known only at runtime. Fixes #7221
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client/taskenv/services.go
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| } | ||
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| service.Name = taskEnv.ReplaceEnv(service.Name) | ||
| service.PortLabel = taskEnv.ReplaceEnv(service.PortLabel) | ||
| service.Tags = taskEnv.ParseAndReplace(service.Tags) | ||
| service.CanaryTags = taskEnv.ParseAndReplace(service.CanaryTags) | ||
| service.Meta = interpolateMapStringString(taskEnv, service.Meta) | ||
| service.CanaryMeta = interpolateMapStringString(taskEnv, service.CanaryMeta) | ||
| service.Connect = interpolateConnect(taskEnv, service.Connect) |
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Somewhat related because we're potentially setting these to nil and not empty maps, none of these three fields is Canonicalized. Should we be doing that and/or should we be assigning an empty map here for safety?
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The canonicalized form of empty maps is nil (at least in services + consul)
nomad/nomad/structs/services.go
Line 174 in a480eed
Copy also make use of the helper.Copy* functions which also reduce to nil if there are no elements
https://github.com/hashicorp/nomad/blob/master/helper/funcs.go#L282
client/taskenv/services.go
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| // make one copy and interpolate in-place on that | ||
| modified := orig.Copy() |
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The caller copies Service... shouldn't we already have a copy of the structs.ConsulConnect too?
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Good catch! Indeed there's no reason to create an extra copy here.
| for k, v := range proxy.EnvoyGatewayBindAddresses { | ||
| m[taskEnv.ReplaceEnv(k)] = &structs.ConsulGatewayBindAddress{ | ||
| Address: taskEnv.ReplaceEnv(v.Address), | ||
| Port: v.Port, |
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It looks like you interpolate the sidecar port below. Is there a reason we're not can't for this port?
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The ConsulGatewayBindAddress field is an int, and there's (currently?) no way to interpolate int values
https://github.com/hashicorp/nomad/blob/master/nomad/structs/services.go#L1291
Co-authored-by: Tim Gross <tgross@hashicorp.com>
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This PR enables job submitters to use interpolation in the connect
block of jobs making use of consul connect. Before, only the name of
the connect service would be interpolated, and only for a few select
identifiers related to the job itself (#6853). Now, all connect fields
can be interpolated using the full spectrum of runtime parameters.
Note that the service name is interpolated at job-submission time,
and cannot make use of values known only at runtime.
Fixes #7221