With wait consul-template never starts the program
#1043
Comments
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Having the same issue with multiple templates and wait configured via command line flags. It works with just one template, though. |
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I am experiencing the same problem. I have some more information. If there are multiple templates and the wait state applies to more than one then the program never starts. The failure applies to consul-template in long-running mode. In -once mode, the program does start. This works: This works: This FAILS: This FAILS: The common thread between those last two scenarios is that the wait states apply to more than one of the templates. Hope this helps! |
When consul-template -wait argument is given, the exec command is never executed. See hashicorp/consul-template#1043
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I ran this down with I'll go out on a limb that @dadgar's refactor in #988 between 0.19.0 and 0.19.1 needs another set of eyes, as it resulted in bug #991 and fixing that caused this bug, and likely there's some deeper race condition. Hope this is enough information to debug to a resolution, I'm tapped out for the day in my timezone. |
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We are bitten by this bug. |
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@pearkes I've debugged this to the point of providing a reproduction case and a suspect commit. Are you able to take it from here to a fix given this information? |
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Any update on this? |
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I believe I have a fix in #1174. It is the best I could do with my understanding of the system, but does resolve this behavior and calls |
Consul Template version
0.19.4 (works with 0.19.0)
Configuration
{{$environ := env "ENV"}} {{$app_id := env "PROMETHEUS_APP_ID"}} {{$perimeter := env "PROMETHEUS_PERIMETER"}} {{with (printf "/prometheus/%s/%s/config_%s" $perimeter $app_id $environ)}} {{if keyExists .}} # ======================================================================= # Updated from consul KV (key = {{.}}) at {{timestamp}} # ======================================================================= {{key .}} {{else}} # ======================================================================= # Updated from consul KV (key = {{.}}) at {{timestamp}} # ======================================================================= {{key (printf "/prometheus/%s/%s/config" $perimeter $app_id)}} {{end}} {{end}}Command
../consul-template \ --config=alertmanager.hcl \ --exec 'bash -c "echo start; sleep 10; echo stop"'Debug output
0.19.4
0.19.0
Expected behavior
0.19.4 should behave like 0.19.0
Actual behavior
It never starts the command
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