Pipe http server log to hclog, so that it uses the same logging format
as rest of nomad logs. Also, supports emitting them as json logs, when
json formatting is set.
The http server logs are emitted as Trace level, as they are typically
repsent HTTP client errors (e.g. failed tls handshakes, invalid headers,
etc).
Though, Panic logs represent server errors and are relayed as Error
level.
Protect against a panic when we attempt to start a container with a name
that conflicts with an existing one. If the existing one is being
deleted while nomad first attempts to create the container, the
createContainer will fail with `container already exists`, but we get
nil container reference from the `containerByName` lookup, and cause a
crash.
I'm not certain how we get into the state, except for being very
unlucky. I suspect that this case may be the result of a concurrent
restart or the docker engine API not being fully consistent (e.g. an
earlier call purged the container, but docker didn't free up resources
yet to create a new container with the same name immediately yet).
If that's the case, then re-attempting creation will hopefully succeed,
or we'd at least fail enough times for the alloc to be rescheduled to
another node.
This page has not been updated (yet) to reflect that support for all 3 job types (service, batch, system) which shipped in 0.9.2.
The current page implies that preemption is only available for system jobs.
This is early preparation for Nomad 0.12, where we plan to move Preemption from Enterprise feature suite to OSS for all.
The field names within the structs representing the Connect proxy
definition were not the same (nomad/structs/ vs api/), causing the
values to be lost in translation for the 'nomad job inspect' command.
Since the field names already shipped in v0.11.0 we cannot simply
fix the names. Instead, use the json struct tag on the structs/ structs
to remap the name to match the publicly expose api/ package on json
encoding.
This means existing jobs from v0.11.0 will continue to work, and
the JSON API for job submission will remain backwards compatible.
Before, the proxy stanza did not parse non-object fields
`local_service_port` and `local_service_address` from the
connect `proxy` stanza. This change fixes that.
* documents the scaling block in the JSON Job docs
resolves#7656
* add task-specific restart to JSON Job docs
companion to #7603
* [docs] improved and corrected scaling docs
* Update website/pages/api-docs/json-jobs.mdx
Co-Authored-By: Michael Schurter <mschurter@hashicorp.com>
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
* update `restart` documentation
#7288 added support for task-specific `restart` policy. this PR updates the docs to reflect that.
* added an explicit example of task-specific restart policy
* Update website/pages/docs/job-specification/restart.mdx
Shutdown http server last, after nomad client/server components
terminate.
Before this change, if the agent is taking an unexpectedly long time to
shutdown, the operator cannot query the http server directly: they
cannot access agent specific http endpoints and need to query another
agent about the troublesome agent.
Unexpectedly long shutdown can happen in normal cases, e.g. a client
might hung is if one of the allocs it is running has a long
shutdown_delay.
Here, we switch to ensuring that the http server is shutdown last.
I believe this doesn't require extra care in agent shutting down logic
while operators may be able to submit write http requests. We already
need to cope with operators submiting these http requests to another
agent or by servers updating the client allocations.
Mahmood Ali