If the dynamic port range for a node is set so that the min is equal to the max,
there's only one port available and this passes config validation. But the
scheduler panics when it tries to pick a random port. Only add the randomness
when there's more than one to pick from.
Adds a test for the behavior but also adjusts the commentary on a couple of the
existing tests that made it seem like this case was already covered if you
didn't look too closely.
Fixes: #17585
* jobspec: rename node pool scheduler_configuration
In HCL specifications we usually call configuration blocks `config`
instead of `configuration`.
* np: add memory oversubscription config
* np: make scheduler config ENT
Add structs and fields to support the Nomad Pools Governance Enterprise
feature of controlling node pool access via namespaces.
Nomad Enterprise allows users to specify a default node pool to be used
by jobs that don't specify one. In order to accomplish this, it's
necessary to distinguish between a job that explicitly uses the
`default` node pool and one that did not specify any.
If the `default` node pool is set during job canonicalization it's
impossible to do this, so this commit allows a job to have an empty node
pool value during registration but sets to `default` at the admission
controller mutator.
In order to guarantee state consistency the state store validates that
the job node pool is set and exists before inserting it.
When registering a node with a new node pool in a non-authoritative
region we can't create the node pool because this new pool will not be
replicated to other regions.
This commit modifies the node registration logic to only allow automatic
node pool creation in the authoritative region.
In non-authoritative regions, the client is registered, but the node
pool is not created. The client is kept in the `initialing` status until
its node pool is created in the authoritative region and replicated to
the client's region.
We don't want to delete node pools that have nodes or non-terminal jobs. Add a
check in the `DeleteNodePools` RPC to check locally and in federated regions,
similar to how we check that it's safe to delete namespaces.
Upserts and deletes of node pools are forwarded to the authoritative region,
just like we do for namespaces, quotas, ACL policies, etc. Replicate node pools
from the authoritative region.
Whenever we write a Raft log entry for node pools, we need to first make sure
that all servers can safely apply the log without panicking. Gate upsert and
delete RPCs on all servers being upgraded to the minimum version.
If the authoritative region has been upgraded to a version of Nomad that has new
replicated objects (such as ACL Auth Methods, ACL Binding Rules, etc.), the
non-authoritative regions will start replicating those objects as soon as their
leader is upgraded. If a server in the non-authoritative region is upgraded and
then becomes the leader before all the other servers in the region have been
upgraded, then it will attempt to write a Raft log entry that the followers
don't understand. The followers will then panic.
Add same the minimum version checks that we do for RPC writes to the leader's
replication loop.
Implement scheduler support for node pool:
* When a scheduler is invoked, we get a set of the ready nodes in the DCs that
are allowed for that job. Extend the filter to include the node pool.
* Ensure that changes to a job's node pool are picked up as destructive
allocation updates.
* Add `NodesInPool` as a metric to all reporting done by the scheduler.
* Add the node-in-pool the filter to the `Node.Register` RPC so that we don't
generate spurious evals for nodes in the wrong pool.
Implements the HTTP API associated with the `NodePool.ListJobs` RPC, including
the `api` package for the public API and documentation.
Update the `NodePool.ListJobs` RPC to fix the missing handling of the special
"all" pool.
When checking if a token is allowed to query the search endpoints we
need to return an error if the search context includes `node_pool` and
the token doesn't have access to _any_ pool. This prevents returning an
empty list instead of a permission denied error.
Add a new job admission hook for node pools that enforces the pool exists on
registration. Also provide the skeleton function we need for Enterprise
enforcement functions we'll implement later.
Move all validations related to task fields to Task.Validate(). Prior to
this, some task validations were being done inside TaskGroup.Validate()
because they required access to some group values.
But similarly to how TaskGroup.Validate() tasks the job as parameter,
it's fair to expect the task to receive its group.
This changeset only adds the `node_pool` field to the jobspec, and ensures that
it gets picked up correctly as a change. Without the rest of the implementation
landed yet, the field will be ignored.
The `nomad tls cert` command did not create certificates with the correct SANs for
them to work with non default domain and region names. This changset updates the
code to support non default domains and regions in the certificates.
When resolving ACL policies, we were not using the parent ID for the policy
lookup for dispatch/periodic jobs, even though the claims were signed for that
parent ID. This prevents all calls to the Task API (and other WI-authenticated
API calls) from a periodically-dispatched job failing with 403.
Fix this by using the parent job ID whenever it's available.
New RPC endpoints introduced during OIDC and JWT auth perform unnecessary many RPC calls when they upsert generated ACL tokens, as pointed out by @tgross.
This PR moves the common logic from acl.UpsertTokens method into a helper method that contains common logic, and sidesteps authentication, metrics, etc.
Implementation of the base work for the new node pools feature. It includes a new `NodePool` struct and its corresponding state store table.
Upon start the state store is populated with two built-in node pools that cannot be modified nor deleted:
* `all` is a node pool that always includes all nodes in the cluster.
* `default` is the node pool where nodes that don't specify a node pool in their configuration are placed.
* core: eliminate second index on job_submissions table
This PR refactors the job_submissions state store code to eliminate the
use of a second index formerly used for purging all versions of a given
job. In practice we ended up with duplicate entries on the table. Instead,
use index prefix scanning on the primary index and tidy up any potential
for creating (or removing) duplicates.
* core: pr comments followup
When client nodes are restarted, all allocations that have been scheduled on the
node have their modify index updated, including terminal allocations. There are
several contributing factors:
* The `allocSync` method that updates the servers isn't gated on first contact
with the servers. This means that if a server updates the desired state while
the client is down, the `allocSync` races with the `Node.ClientGetAlloc`
RPC. This will typically result in the client updating the server with "running"
and then immediately thereafter "complete".
* The `allocSync` method unconditionally sends the `Node.UpdateAlloc` RPC even
if it's possible to assert that the server has definitely seen the client
state. The allocrunner may queue-up updates even if we gate sending them. So
then we end up with a race between the allocrunner updating its internal state
to overwrite the previous update and `allocSync` sending the bogus or duplicate
update.
This changeset adds tracking of server-acknowledged state to the
allocrunner. This state gets checked in the `allocSync` before adding the update
to the batch, and updated when `Node.UpdateAlloc` returns successfully. To
implement this we need to be able to equality-check the updates against the last
acknowledged state. We also need to add the last acknowledged state to the
client state DB, otherwise we'd drop unacknowledged updates across restarts.
The client restart test has been expanded to cover a variety of allocation
states, including allocs stopped before shutdown, allocs stopped by the server
while the client is down, and allocs that have been completely GC'd on the
server while the client is down. I've also bench tested scenarios where the task
workload is killed while the client is down, resulting in a failed restore.
Fixes#16381
* api: set the job submission during job reversion
This PR fixes a bug where the job submission would always be nil when
a job goes through a reversion to a previous version. Basically we need
to detect when this happens, lookup the submission of the job version
being reverted to, and set that as the submission of the new job being
created.
* e2e: add e2e test for job submissions during reversion
This e2e test ensures a reverted job inherits the job submission
associated with the version of the job being reverted to.
to avoid leaking task resources (e.g. containers,
iptables) if allocRunner prerun fails during
restore on client restart.
now if prerun fails, TaskRunner.MarkFailedKill()
will only emit an event, mark the task as failed,
and cancel the tr's killCtx, so then ar.runTasks()
-> tr.Run() can take care of the actual cleanup.
removed from (formerly) tr.MarkFailedDead(),
now handled by tr.Run():
* set task state as dead
* save task runner local state
* task stop hooks
also done in tr.Run() now that it's not skipped:
* handleKill() to kill tasks while respecting
their shutdown delay, and retrying as needed
* also includes task preKill hooks
* clearDriverHandle() to destroy the task
and associated resources
* task exited hooks
* connect: use heuristic to detect sidecar task driver
This PR adds a heuristic to detect whether to use the podman task driver
for the connect sidecar proxy. The podman driver will be selected if there
is at least one task in the task group configured to use podman, and there
are zero tasks in the group configured to use docker. In all other cases
the task driver defaults to docker.
After this change, we should be able to run typical Connect jobspecs
(e.g. nomad job init [-short] -connect) on Clusters configured with the
podman task driver, without modification to the job files.
Closes#17042
* golf: cleanup driver detection logic
The job scale RPC endpoint hard-coded the eval creation to use the
type of service. This meant scaling events triggered on jobs of
type batch would create evaluations with the wrong type, which
does not seem to cause any problems, just confusion when
correlating the two.
When the server restarts for the upgrade, it loads the `structs.Job` from the
Raft snapshot/logs. The jobspec has long since been parsed, so none of the
guards around the default value are in play. The empty field value for `Enabled`
is the zero value, which is false.
This doesn't impact any running allocation because we don't replace running
allocations when either the client or server restart. But as soon as any
allocation gets rescheduled (ex. you drain all your clients during upgrades),
it'll be using the `structs.Job` that the server has, which has `Enabled =
false`, and logs will not be collected.
This changeset fixes the bug by adding a new field `Disabled` which defaults to
false (so that the zero value works), and deprecates the old field.
Fixes#17076
Their release notes are here: https://github.com/golang-jwt/jwt/releases
Seemed wise to upgrade before we do even more with JWTs. For example
this upgrade *would* have mattered if we already implemented common JWT
claims such as expiration. Since we didn't rely on any claim
verification this upgrade is a noop...
...except for 1 test that called `Claims.Valid()`! Removing that
assertion *seems* scary, but it didn't actually do anything because we
didn't implement any of the standard claims it validated:
https://github.com/golang-jwt/jwt/blob/v4.5.0/map_claims.go#L120-L151
So functionally this major upgrade is a noop.
Some Nomad users ship application logs out-of-band via syslog. For these users
having `logmon` (and `docker_logger`) running is unnecessary overhead. Allow
disabling the logmon and pointing the task's stdout/stderr to /dev/null.
This changeset is the first of several incremental improvements to log
collection short of full-on logging plugins. The next step will likely be to
extend the internal-only task driver configuration so that cluster
administrators can turn off log collection for the entire driver.
---
Fixes: #11175
Co-authored-by: Thomas Weber <towe75@googlemail.com>
Tim Gross