The command line client sends a specific volume ID, but this isn't
enforced at the API level and we were incorrectly using a prefix match
for volume deregistration, resulting in cases where a volume with a
shorter ID that's a prefix of another volume would be deregistered
instead of the intended volume.
When the `volume deregister` or `volume detach` commands get an ID
prefix that matches multiple volumes, show the full length of the
volume IDs in the list of volumes shown so so that the user can select
the correct one.
The size of `stat_t` fields is architecture dependent, which was
reportedly causing a build failure on FreeBSD ARM7 32-bit
systems. This changeset matches the behavior we have on Linux.
When we copy the system DNS to a task's `resolv.conf`, we should set
the permissions as world-readable so that unprivileged users within
the task can read it.
Templates in nomad jobs make use of the vault token defined in
the vault stanza when issuing credentials like client certificates.
When using change_mode "noop" in the vault stanza, consul-template
is not informed in case a vault token is re-issued (which can
happen from time to time for various reasons, as described
in https://www.nomadproject.io/docs/job-specification/vault).
As a result, consul-template will keep using the old vault token
to renew credentials and - once the token expired - stop renewing
credentials. The symptom of this problem is a vault_token
file that is newer than the issued credential (e.g., TLS certificate)
in a job's /secrets directory.
This change corrects this, so that h.updater.updatedVaultToken(token)
is called, which will inform stakeholders about the new
token and make sure, the new token is used by consul-template.
Example job template fragment:
vault {
policies = ["nomad-job-policy"]
change_mode = "noop"
}
template {
data = <<-EOH
{{ with secret "pki_int/issue/nomad-job"
"common_name=myjob.service.consul" "ttl=90m"
"alt_names=localhost" "ip_sans=127.0.0.1"}}
{{ .Data.certificate }}
{{ .Data.private_key }}
{{ .Data.issuing_ca }}
{{ end }}
EOH
destination = "${NOMAD_SECRETS_DIR}/myjob.crt"
change_mode = "noop"
}
This fix does not alter the meaning of the three change modes of vault
- "noop" - Take no action
- "restart" - Restart the job
- "signal" - send a signal to the task
as the switch statement following line 232 contains the necessary
logic.
It is assumed that "take no action" was never meant to mean "don't tell
consul-template about the new vault token".
Successfully tested in a staging cluster consisting of multiple
nomad client nodes.
This PR exposes the following existing`consul-template` configuration options to Nomad jobspec authors in the `{job.group.task.template}` stanza.
- `wait`
It also exposes the following`consul-template` configuration to Nomad operators in the `{client.template}` stanza.
- `max_stale`
- `block_query_wait`
- `consul_retry`
- `vault_retry`
- `wait`
Finally, it adds the following new Nomad-specific configuration to the `{client.template}` stanza that allows Operators to set bounds on what `jobspec` authors configure.
- `wait_bounds`
Co-authored-by: Tim Gross <tgross@hashicorp.com>
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
Client endpoints such as `alloc exec` are enforced on the client if
the API client or CLI has "line of sight" to the client. This is
already in the Learn guide but having it in the ACL configuration docs
would be helpful.
* Fixed name of `nomad.scheduler.allocs.reschedule` metric
* Added new metrics to metrics reference documentation
* Expanded definitions of "waiting" metrics
* Changelog entry for #10236 and #10237
## Development Environment Changes
* Added stringer to build deps
## New HTTP APIs
* Added scheduler worker config API
* Added scheduler worker info API
## New Internals
* (Scheduler)Worker API refactor—Start(), Stop(), Pause(), Resume()
* Update shutdown to use context
* Add mutex for contended server data
- `workerLock` for the `workers` slice
- `workerConfigLock` for the `Server.Config.NumSchedulers` and
`Server.Config.EnabledSchedulers` values
## Other
* Adding docs for scheduler worker api
* Add changelog message
Co-authored-by: Derek Strickland <1111455+DerekStrickland@users.noreply.github.com>
