* docs: update json jobs docs
Did you know that Nomad has not 1 but 2 JSON formats for jobs? 2½ if you
want to acknowledge that sometimes our JSON job representations have a
Job top-level wrapper and sometimes do not.
The 2½ formats are:
```
1. HCL JSON
2. Input API JSON (top-level Job field)
2.5. Output API JSON (lacks top-level Job field)
```
`#2` is what our docs consider our API JSON. `#2.5` seems to be an
accident of history we can't fix with breaking API compatibility.
`#1` is an even more interesting accident of history: the `jobspec2`
package automatically detects if the input to Parse is JSON and switches
to a JSON parser. This behavior is undocumented, the format is
unspecified, and there is no official HashiCorp tooling to produce this
JSON from HCL. The plot thickens when you discover popular third party
tools like hcl2json.com and https://github.com/tmccombs/hcl2json seem to
produce JSON that `nomad run` accepts!
Since we have no telemetry around whether or not anyone passes HCL JSON
to `nomad run`, and people don't file bugs around features that Just
Work, I'm choosing to leave that code path in place and *acknowledged
but not suggested* in documentation.
See https://github.com/hashicorp/hcl/issues/498 for a more comprehensive
discussion of what officially supporting HCL JSON in Nomad would look
like.
(I also added some of the missing fields to the (Input API flavor) JSON
Job documentation, but it still needs a lot of work to be
comprehensive.)
Co-authored-by: Tim Gross <tgross@hashicorp.com>
After a more detailed analysis of this feature, the approach taken in
PR #12449 was found to be not ideal due to poor UX (users are
responsible for setting the entity alias they would like to use) and
issues around jobs potentially masquerading itself as another Vault
entity.
* cli: add -json flag to support job commands
While the CLI has always supported running JSON jobs, its support has
been via HCLv2's JSON parsing. I have no idea what format it expects the
job to be in, but it's absolutely not in the same format as the API
expects.
So I ignored that and added a new -json flag to explicitly support *API*
style JSON jobspecs.
The jobspecs can even have the wrapping {"Job": {...}} envelope or not!
* docs: fix example for `nomad job validate`
We haven't been able to validate inside driver config stanzas ever since
the move to task driver plugins. 😭
Some operators use very long group/task `shutdown_delay` settings to
safely drain network connections to their workloads after service
deregistration. But during incident response, they may want to cause
that drain to be skipped so they can quickly shed load.
Provide a `-no-shutdown-delay` flag on the `nomad alloc stop` and
`nomad job stop` commands that bypasses the delay. This sets a new
desired transition state on the affected allocations that the
allocation/task runner will identify during pre-kill on the client.
Note (as documented here) that using this flag will almost always
result in failed inbound network connections for workloads as the
tasks will exit before clients receive updated service discovery
information and won't be gracefully drained.
This change modifies the Nomad job register and deregister RPCs to
accept an updated option set which includes eval priority. This
param is optional and override the use of the job priority to set
the eval priority.
In order to ensure all evaluations as a result of the request use
the same eval priority, the priority is shared to the
allocReconciler and deploymentWatcher. This creates a new
distinction between eval priority and job priority.
The Nomad agent HTTP API has been modified to allow setting the
eval priority on job update and delete. To keep consistency with
the current v1 API, job update accepts this as a payload param;
job delete accepts this as a query param.
Any user supplied value is validated within the agent HTTP handler
removing the need to pass invalid requests to the server.
The register and deregister opts functions now all for setting
the eval priority on requests.
The change includes a small change to the DeregisterOpts function
which handles nil opts. This brings the function inline with the
RegisterOpts.
Otherwise the spinner would just end, which felt a bit awkward.
I wanted to see a "✓" to know that everything was ok, and a "!" (maybe something else?) if something went wrong.
System and batch jobs don't create deployments, which means nomad tries
to monitor a non-existent deployment when it runs a job and outputs an
error message. This adds a check to make sure a deployment exists before
monitoring. Also fixes some formatting.
Co-authored-by: Tim Gross <tgross@hashicorp.com>
This PR adds the common OSS changes for adding support for Consul Namespaces,
which is going to be a Nomad Enterprise feature. There is no new functionality
provided by this changeset and hopefully no new bugs.
