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>
PR #14492 introduced a new check to return 0 when the `nomad job plan`
command returns a diff of type `None`.
But the `-diff` CLI flag was also being used to control whether the plan
request should return the diff of not instead of just controlling if the
diff was printed.
This means that when `-diff=false` is set the response does not include
any diff information, and so the new check panics.
This commit fixes the problem by always requesting a diff and using the
`-diff` only for controlling output, as it's currently documented.
* Honor value for distinct_hosts constraint
* Add test for feasibility checking for `false`
---------
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
Adds a new configuration to clients to optionally allow them to drain their
workloads on shutdown. The client sends the `Node.UpdateDrain` RPC targeting
itself and then monitors the drain state as seen by the server until the drain
is complete or the deadline expires. If it loses connection with the server, it
will monitor local client status instead to ensure allocations are stopped
before exiting.
If an allocation is slow to stop because of `kill_timeout` or `shutdown_delay`,
the node drain is marked as complete prematurely, even though drain monitoring
will continue to report allocation migrations. This impacts the UI or API
clients that monitor node draining to shut down nodes.
This changeset updates the behavior to wait until the client status of all
drained allocs are terminal before marking the node as done draining.
* [no ci] deps: update docker to 23.0.3
This PR brings our docker/docker dependency (which is hosted at github.com/moby/moby)
up to 23.0.3 (forward about 2 years). Refactored our use of docker/libnetwork to
reference the package in its new home, which is docker/docker/libnetwork (it is
no longer an independent repository). Some minor nearby test case cleanup as well.
* add cl
* func: add namespace support for list deployment
* func: add wildcard to namespace filter for deployments
* Update deployment_endpoint.go
* style: use must instead of require or asseert
* style: rename paginator to avoid clash with import
* style: add changelog entry
* fix: add missing parameter for upsert jobs
The first start of a Consul Connect proxy sidecar triggers a run
of the envoy_version hook which modifies the task config image
entry. The modification takes into account a number of factors to
correctly populate this. Importantly, once the hook has run, it
marks itself as done so the taskrunner will not execute it again.
When the client receives a non-destructive update for the
allocation which the proxy sidecar is a member of, it will update
and overwrite the task definition within the taskerunner. In doing
so it overwrite the modification performed by the hook. If the
allocation is restarted, the envoy_version hook will be skipped as
it previously marked itself as done, and therefore the sidecar
config image is incorrect and causes a driver error.
The fix removes the hook in marking itself as done to the view of
the taskrunner.
* api: enable support for setting original source alongside job
This PR adds support for setting job source material along with
the registration of a job.
This includes a new HTTP endpoint and a new RPC endpoint for
making queries for the original source of a job. The
HTTP endpoint is /v1/job/<id>/submission?version=<version> and
the RPC method is Job.GetJobSubmission.
The job source (if submitted, and doing so is always optional), is
stored in the job_submission memdb table, separately from the
actual job. This way we do not incur overhead of reading the large
string field throughout normal job operations.
The server config now includes job_max_source_size for configuring
the maximum size the job source may be, before the server simply
drops the source material. This should help prevent Bad Things from
happening when huge jobs are submitted. If the value is set to 0,
all job source material will be dropped.
* api: avoid writing var content to disk for parsing
* api: move submission validation into RPC layer
* api: return an error if updating a job submission without namespace or job id
* api: be exact about the job index we associate a submission with (modify)
* api: reword api docs scheduling
* api: prune all but the last 6 job submissions
* api: protect against nil job submission in job validation
* api: set max job source size in test server
* api: fixups from pr
new WaitForPlugin() called during csiHook.Prerun,
so that on startup, clients can recover running
tasks that use CSI volumes, instead of them being
terminated and rescheduled because they need a
node plugin that is "not found" *yet*, only because
the plugin task has not yet been recovered.
The `ephemeral_disk` block's `migrate` field allows for best-effort migration of
the ephemeral disk data to new nodes. The documentation says the `migrate` field
is only respected if `sticky=true`, but in fact if client ACLs are not set the
data is migrated even if `sticky=false`.
The existing behavior when client ACLs are disabled has existed since the early
implementation, so "fixing" that case now would silently break backwards
compatibility. Additionally, having `migrate` not imply `sticky` seems
nonsensical: it suggests that if we place on a new node we migrate the data but
if we place on the same node, we throw the data away!
Update so that `migrate=true` implies `sticky=true` as follows:
* The failure mode when client ACLs are enabled comes from the server not passing
along a migration token. Update the server so that the server provides a
migration token whenever `migrate=true` and not just when `sticky=true` too.
* Update the scheduler so that `migrate` implies `sticky`.
* Update the client so that we check for `migrate || sticky` where appropriate.
* Refactor the E2E tests to move them off the old framework and make the intention
of the test more clear.
Requests without an ACL token that pass thru the client's HTTP API are treated
as though they come from the client itself. This allows bypass of ACLs on RPC
requests where ACL permissions are checked (like `Job.Register`). Invalid tokens
are correctly rejected.
Fix the bypass by only setting a client ID on the identity if we have a valid node secret.
Note that this changeset will break rate metrics for RPCs sent by clients
without a client secret such as `Node.GetClientAllocs`; these requests will be
recorded as anonymous.
Future work should:
* Ensure the node secret is sent with all client-driven RPCs except
`Node.Register` which is TOFU.
* Create a new `acl.ACL` object from client requests so that we
can enforce ACLs for all endpoints in a uniform way that's less error-prone.~
This update changes the behaviour when following logs from an
allocation, so that both stdout and stderr files streamed when the
operator supplies the follow flag. The previous behaviour is held
when all other flags and situations are provided.
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
When we added recovery of pause containers in #16352 we called the recovery
function from the plugin factory function. But in our plugin setup protocol, a
plugin isn't ready for use until we call `SetConfig`. This meant that
recovering pause containers was always done with the default
config. Setting up the Docker client only happens once, so setting the wrong
config in the recovery function also means that all other Docker API calls will
use the default config.
Move the `recoveryPauseContainers` call into the `SetConfig`. Fix the error
handling so that we return any error but also don't log when the context is
canceled, which happens twice during normal startup as we fingerprint the
driver.
Currently, the `exec` driver is only setting the Bounding set, which is
not sufficient to actually enable the requisite capabilities for the
task process. In order for the capabilities to survive `execve`
performed by libcontainer, the `Permitted`, `Inheritable`, and `Ambient`
sets must also be set.
Per CAPABILITIES (7):
> Ambient: This is a set of capabilities that are preserved across an
> execve(2) of a program that is not privileged. The ambient capability
> set obeys the invariant that no capability can ever be ambient if it
> is not both permitted and inheritable.
* client/fingerprint: correctly fingerprint E/P cores of Apple Silicon chips
This PR adds detection of asymetric core types (Power & Efficiency) (P/E)
when running on M1/M2 Apple Silicon CPUs. This functionality is provided
by shoenig/go-m1cpu which makes use of the Apple IOKit framework to read
undocumented registers containing CPU performance data. Currently working
on getting that functionality merged upstream into gopsutil, but gopsutil
would still not support detecting P vs E cores like this PR does.
Also refactors the CPUFingerprinter code to handle the mixed core
types, now setting power vs efficiency cpu attributes.
For now the scheduler is still unaware of mixed core types - on Apple
platforms tasks cannot reserve cores anyway so it doesn't matter, but
at least now the total CPU shares available will be correct.
Future work should include adding support for detecting P/E cores on
the latest and upcoming Intel chips, where computation of total cpu shares
is currently incorrect. For that, we should also include updating the
scheduler to be core-type aware, so that tasks of resources.cores on Linux
platforms can be assigned the correct number of CPU shares for the core
type(s) they have been assigned.
node attributes before
cpu.arch = arm64
cpu.modelname = Apple M2 Pro
cpu.numcores = 12
cpu.reservablecores = 0
cpu.totalcompute = 1000
node attributes after
cpu.arch = arm64
cpu.frequency.efficiency = 2424
cpu.frequency.power = 3504
cpu.modelname = Apple M2 Pro
cpu.numcores.efficiency = 4
cpu.numcores.power = 8
cpu.reservablecores = 0
cpu.totalcompute = 37728
* fingerprint/cpu: follow up cr items
* Multiple instances of a periodic job are run simultaneously, when prohibit_overlap is true
Fixes#11052
When restoring periodic dispatcher, all periodic jobs are forced without checking for previous childre.
* Multiple instances of a periodic job are run simultaneously, when prohibit_overlap is true
Fixes#11052
When restoring periodic dispatcher, all periodic jobs are forced without checking for previous children.
* style: refactor force run function
* fix: remove defer and inline unlock for speed optimization
* Update nomad/leader.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* style: refactor tests to use must
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update nomad/leader_test.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* fix: move back from defer to calling unlock before returning.
createEval cant be called with the lock on
* style: refactor test to use must
* added new entry to changelog and update comments
---------
Co-authored-by: James Rasell <jrasell@hashicorp.com>
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
When a disconnect client reconnects the `allocReconciler` must find the
allocations that were created to replace the original disconnected
allocations.
This process was being done in only a subset of non-terminal untainted
allocations, meaning that, if the replacement allocations were not in
this state the reconciler didn't stop them, leaving the job in an
inconsistent state.
This inconsistency is only solved in a future job evaluation, but at
that point the allocation is considered reconnected and so the specific
reconnection logic was not applied, leading to unexpected outcomes.
This commit fixes the problem by running reconnecting allocation
reconciliation logic earlier into the process, leaving the rest of the
reconciler oblivious of reconnecting allocations.
It also uses the full set of allocations to search for replacements,
stopping them even if they are not in the `untainted` set.
The system `SystemScheduler` is not affected by this bug because
disconnected clients don't trigger replacements: every eligible client
is already running an allocation.
Implement the new `nomad job restart` command that allows operators to
restart allocations tasks or reschedule then entire allocation.
Restarts can be batched to target multiple allocations in parallel.
Between each batch the command can stop and hold for a predefined time
or until the user confirms that the process should proceed.
This implements the "Stateless Restarts" alternative from the original
RFC
(https://gist.github.com/schmichael/e0b8b2ec1eb146301175fd87ddd46180).
The original concept is still worth implementing, as it allows this
functionality to be exposed over an API that can be consumed by the
Nomad UI and other clients. But the implementation turned out to be more
complex than we initially expected so we thought it would be better to
release a stateless CLI-based implementation first to gather feedback
and validate the restart behaviour.
Co-authored-by: Shishir Mahajan <smahajan@roblox.com>
Fixes#16517
Given a 3 Server cluster with at least 1 Client connected to Follower 1:
If a NodeMeta.{Apply,Read} for the Client request is received by
Follower 1 with `AllowStale = false` the Follower will forward the
request to the Leader.
The Leader, not being connected to the target Client, will forward the
RPC to Follower 1.
Follower 1, seeing AllowStale=false, will forward the request to the
Leader.
The Leader, not being connected to... well hoppefully you get the
picture: an infinite loop occurs.
* Throw your mouse into traffic
* Add node metadata with a shortcut
* Re-labelled
* Adds a toast notification to job start/stop on keyboard shortcut
* Typo fix
* Added and flag to command
* cli[style]: small refactor to avoid confussion with tmpl variable
* Update inspect.mdx
* cli: add changelog entry
* Update .changelog/16478.txt
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update command/quota_inspect.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
---------
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* cli: add json and t flags to quota status command
* cli: add entry to changelog
* Update command/quota_status.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
---------
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* cli: Add and flags to server members
* Update website/content/docs/commands/server/members.mdx
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Update website/content/docs/commands/server/members.mdx
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* cli: update the server memebers tests to use must
* cli: add flags addition to changelog
---------
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
nomad login command does not need to know ACL Auth Method's type, since all
method names are unique.
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* services: always set deregister flag after deregistration of group
This PR fixes a bug where the group service hook's deregister flag was
not set in some cases, causing the hook to attempt deregistrations twice
during job updates (alloc replacement).
In the tests ... we used to assert on the wrong behvior (remove twice) which
has now been corrected to assert we remove only once.
This bug was "silent" in the Consul provider world because the error logs for
double deregistration only show up in Consul logs; with the Nomad provider the
error logs are in the Nomad agent logs.
* services: cleanup group service hook tests
In #16217 we switched clients using Consul discovery to the `Status.Members`
endpoint for getting the list of servers so that we're using the correct
address. This endpoint has an authorization gate, so this fails if the anonymous
policy doesn't have `node:read`. We also can't check the `AuthToken` for the
request for the client secret, because the client hasn't yet registered so the
server doesn't have anything to compare against.
Instead of hitting the `Status.Peers` or `Status.Members` RPC endpoint, use the
Consul response directly. Update the `registerNode` method to handle the list of
servers we get back in the response; if we get a "no servers" or "no path to
region" response we'll kick off discovery again and retry immediately rather
than waiting 15s.
* landlock: git needs more files for private repositories
This PR fixes artifact downloading so that git may work when cloning from
private repositories. It needs
- file read on /etc/passwd
- dir read on /root/.ssh
- file write on /root/.ssh/known_hosts
Add these rules to the landlock rules for the artifact sandbox.
* cr: use nonexistent instead of devnull
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
* cr: use go-homdir for looking up home directory
* pr: pull go-homedir into explicit require
* cr: fixup homedir tests in homeless root cases
* cl: fix root test for real
---------
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
* cli: Add and flag to namespace status command
* Update command/namespace_status.go
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* cli: update tests for namespace status command to use must
---------
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
Our auth token parsing code trims space around the `Authorization` header but
not around `X-Nomad-Token`. When using the UI, it's easy to accidentally
introduce a leading or trailing space, which results in spurious authentication
errors. Trim the space at the HTTP server.
* cgv1: do not disable cpuset manager if reserved interface already exists
This PR fixes a bug where restarting a Nomad Client on a machine using cgroups
v1 (e.g. Ubuntu 20.04) would cause the cpuset cgroups manager to disable itself.
This is being caused by incorrectly interpreting a "file exists" error as
problematic when ensuring the reserved cpuset exists. If we get a "file exists"
error, that just means the Client was likely restarted.
Note that a machine reboot would fix the issue - the groups interfaces are
ephemoral.
* cl: add cl
The job evaluate endpoint creates a new evaluation for the job which is
a write operation. This change modifies the necessary capability from
`read-job` to `submit-job` to better reflect this.
ACL policies can be associated with a job so that the job's Workload Identity
can have expanded access to other policy objects, including other
variables. Policies set on the variables the job automatically has access to
were ignored, but this includes policies with `deny` capabilities.
Additionally, when resolving claims for a workload identity without any attached
policies, the `ResolveClaims` method returned a `nil` ACL object, which is
treated similarly to a management token. While this was safe in Nomad 1.4.x,
when the workload identity token was exposed to the task via the `identity`
block, this allows a user with `submit-job` capabilities to escalate their
privileges.
We originally implemented automatic workload access to Variables as a separate
code path in the Variables RPC endpoint so that we don't have to generate
on-the-fly policies that blow up the ACL policy cache. This is fairly brittle
but also the behavior around wildcard paths in policies different from the rest
of our ACL polices, which is hard to reason about.
Add an `ACLClaim` parameter to the `AllowVariableOperation` method so that we
can push all this logic into the `acl` package and the behavior can be
consistent. This will allow a `deny` policy to override automatic access (and
probably speed up checks of non-automatic variable access).
* cli: add -json flag to alloc checks for completion
* CLI: Expand test to include testing the json flag for allocation checks
* Documentation: Add the checks command
* Documentation: Add example for alloc check command
* Update website/content/docs/commands/alloc/checks.mdx
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* CLI: Add template flag to alloc checks command
* Update website/content/docs/commands/alloc/checks.mdx
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* CLI: Extend test to include -t flag for alloc checks
* func: add changelog for added flags to alloc checks
* cli[doc]: Make usage section on alloc checks clearer
* Update website/content/docs/commands/alloc/checks.mdx
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
* Delete modd.conf
* cli[doc]: add -t flag to command description for alloc checks
---------
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
Co-authored-by: Juanita De La Cuesta Morales <juanita.delacuestamorales@juanita.delacuestamorales-LHQ7X0QG9X>
Most job subcommands allow for job ID prefix match as a convenience
functionality so users don't have to type the full job ID.
But this introduces a hard ACL requirement that the token used to run
these commands have the `list-jobs` permission, even if the token has
enough permission to execute the basic command action and the user
passed an exact job ID.
This change softens this requirement by not failing the prefix match in
case the request results in a permission denied error and instead using
the information passed by the user directly.
When the scheduler tries to find a placement for a new allocation, it iterates
over a subset of nodes. For each node, we populate a `NetworkIndex` bitmap with
the ports of all existing allocations and any other allocations already proposed
as part of this same evaluation via its `SetAllocs` method. Then we make an
"ask" of the `NetworkIndex` in `AssignPorts` for any ports we need and receive
an "offer" in return. The offer will include both static ports and any dynamic
port assignments.
The `AssignPorts` method was written to support group networks, and it shares
code that selects dynamic ports with the original `AssignTaskNetwork`
code. `AssignTaskNetwork` can request multiple ports from the bitmap at a
time. But `AssignPorts` requests them one at a time and does not account for
possible collisions, and doesn't return an error in that case.
What happens next varies:
1. If the scheduler doesn't place the allocation on that node, the port
conflict is thrown away and there's no problem.
2. If the node is picked and this is the only allocation (or last allocation),
the plan applier will reject the plan when it calls `SetAllocs`, as we'd expect.
3. If the node is picked and there are additional allocations in the same eval
that iterate over the same node, their call to `SetAllocs` will detect the
impossible state and the node will be rejected. This can have the puzzling
behavior where a second task group for the job without any networking at all
can hit a port collision error!
It looks like this bug has existed since we implemented group networks, but
there are several factors that add up to making the issue rare for many users
yet frustratingly frequent for others:
* You're more likely to hit this bug the more tightly packed your range for
dynamic ports is. With 12000 ports in the range by default, many clusters can
avoid this for a long time.
* You're more likely to hit case (3) for jobs with lots of allocations or if a
scheduler has to iterate over a large number of nodes, such as with system jobs,
jobs with `spread` blocks, or (sometimes) jobs using `unique` constraints.
For unlucky combinations of these factors, it's possible that case (3) happens
repeatedly, preventing scheduling of a given job until a client state
change (ex. restarting the agent so all its allocations are rescheduled
elsewhere) re-opens the range of dynamic ports available.
This changeset:
* Fixes the bug by accounting for collisions in dynamic port selection in
`AssignPorts`.
* Adds test coverage for `AssignPorts`, expands coverage of this case for the
deprecated `AssignTaskNetwork`, and tightens the dynamic port range in a
scheduler test for spread scheduling to more easily detect this kind of problem
in the future.
* Adds a `String()` method to `Bitmap` so that any future "screaming" log lines
have a human-readable list of used ports.
* client: disable running artifact downloader as nobody
This PR reverts a change from Nomad 1.5 where artifact downloads were
executed as the nobody user on Linux systems. This was done as an attempt
to improve the security model of artifact downloading where third party
tools such as git or mercurial would be run as the root user with all
the security implications thereof.
However, doing so conflicts with Nomad's own advice for securing the
Client data directory - which when setup with the recommended directory
permissions structure prevents artifact downloads from working as intended.
Artifact downloads are at least still now executed as a child process of
the Nomad agent, and on modern Linux systems make use of the kernel Landlock
feature for limiting filesystem access of the child process.
* docs: update upgrade guide for 1.5.1 sandboxing
* docs: add cl
* docs: add title to upgrade guide fix
Wildcard datacenters introduced a bug where a job with any wildcard datacenters
will always be treated as a destructive update when we check whether a
datacenter has been removed from the jobspec.
Includes updating the helper so that callers don't have to loop over the job's
datacenters.
* Fix for wildcard DC sys/sysbatch jobs
* A few extra modules for wildcard DC in systemish jobs
* doesMatchPattern moved to its own util as match-glob
* DC glob lookup using matchGlob
* PR feedback
Some of the methods in `Allocations()` incorrectly use the `putQuery`
in API calls where `put` is more appropriate since they are not reading
information back. These methods are also not returning request metadata
such as `LastIndex` back to callers, which can be useful to have in some
scenarios.
They also provide poor developer experience as they take an
`*api.Allocation` struct when only the allocation ID is necessary. This
can lead consumers to make unnecessary API calls to fetch the full
allocation.
Fixing these problems require updating the methods' signatures so they
take `*WriteOptions` instead of `*QueryOptions` and return `*WriteMeta`,
but this is a breaking change that requires advanced notice to consumers.
This commit adds a future breaking change notice and also fixes the
`Stop` method so it properly returns request metadata in a backwards
compatible way.
In Nomad 0.12.1 we introduced atomic job registration/deregistration, where the
new eval was written in the same raft entry. Backwards-compatibility checks were
supposed to have been removed in Nomad 1.1.0, but we missed that. This is long
safe to remove.
Several `nomad job` subcommands had duplicate or slightly similar logic
for resolving a job ID from a CLI argument prefix, while others did not
have this functionality at all.
This commit pulls the shared logic to the command Meta and updates all
`nomad job` subcommands to use it.
When native service discovery was added, we used the node secret as the auth
token. Once Workload Identity was added in Nomad 1.4.x we needed to use the
claim token for `template` blocks, and so we allowed valid claims to bypass the
ACL policy check to preserve the existing behavior. (Invalid claims are still
rejected, so this didn't widen any security boundary.)
In reworking authentication for 1.5.0, we unintentionally removed this
bypass. For WIs without a policy attached to their job, everything works as
expected because the resulting `acl.ACL` is nil. But once a policy is attached
to the job the `acl.ACL` is no longer nil and this causes permissions errors.
Fix the regression by adding back the bypass for valid claims. In future work,
we should strongly consider getting turning the implicit policies into real
`ACLPolicy` objects (even if not stored in state) so that we don't have these
kind of brittle exceptions to the auth code.
The signature of the `raftApply` function requires that the caller unwrap the
first returned value (the response from `FSM.Apply`) to see if it's an
error. This puts the burden on the caller to remember to check two different
places for errors, and we've done so inconsistently.
Update `raftApply` to do the unwrapping for us and return any `FSM.Apply` error
as the error value. Similar work was done in Consul in
https://github.com/hashicorp/consul/pull/9991. This eliminates some boilerplate
and surfaces a few minor bugs in the process:
* job deregistrations of already-GC'd jobs were still emitting evals
* reconcile job summaries does not return scheduler errors
* node updates did not report errors associated with inconsistent service
discovery or CSI plugin states
Note that although _most_ of the `FSM.Apply` functions return only errors (which
makes it tempting to remove the first return value entirely), there are few that
return `bool` for some reason and Variables relies on the response value for
proper CAS checking.
Nomad servers can advertise independent IP addresses for `serf` and
`rpc`. Somewhat unexpectedly, the `serf` address is also used for both Serf and
server-to-server RPC communication (including Raft RPC). The address advertised
for `rpc` is only used for client-to-server RPC. This split was introduced
intentionally in Nomad 0.8.
When clients are using Consul discovery for connecting to servers, they get an
initial discovery set from Consul and use the correct `rpc` tag in Consul to get
a list of adddresses for servers. The client then makes a `Status.Peers` RPC to
get the list of those servers that are raft peers. But this endpoint is shared
between servers and clients, and provides the address used for Raft.
Most of the time this is harmless because servers will bind on 0.0.0.0 anyways.,
But in topologies where servers are on a private network and clients are on
separate subnets (or even public subnets), clients will make initial contact
with the server to get the list of peers but then populate their local server
set with unreachable addresses.
Cluster administrators can work around this problem by using `server_join` with
specific IP addresses (or DNS names), because the `Node.UpdateStatus` endpoint
returns the correct set of RPC addresses when updating the node. So once a
client has registered, it will get the correct set of RPC addresses.
This changeset updates the client logic to query `Status.Members` instead of
`Status.Peers`, and then extract the correctly advertised address and port from
the response body.
* build: add BuildDate to version info
will be used in enterprise to compare to license expiration time
* cli: multi-line version output, add BuildDate
before:
$ nomad version
Nomad v1.4.3 (coolfakecommithashomgoshsuchacoolonewoww)
after:
$ nomad version
Nomad v1.5.0-dev
BuildDate 2023-02-17T19:29:26Z
Revision coolfakecommithashomgoshsuchacoolonewoww
compare consul:
$ consul version
Consul v1.14.4
Revision dae670fe
Build Date 2023-01-26T15:47:10Z
Protocol 2 spoken by default, blah blah blah...
and vault:
$ vault version
Vault v1.12.3 (209b3dd99fe8ca320340d08c70cff5f620261f9b), built 2023-02-02T09:07:27Z
* docs: update version command output
The `TaskUpdateRequest` struct we send to task runner update hooks was not
populating the Nomad token that we get from the task runner (which we do for the
Vault token). This results in task runner hooks like the template hook
overwriting the Nomad token with the zero value for the token. This causes
in-place updates of a task to break templates (but not other uses that rely on
identity but don't currently bother to update it, like the identity hook).
The `CSIVolume` struct has references to allocations that are "denormalized"; we
don't store them on the `CSIVolume` struct but hydrate them on read. Tests
detecting potential state store corruptions found two locations where we're not
copying the volume before denormalizing:
* When garbage collecting CSI volume claims.
* When checking if it's safe to force-deregister the volume.
There are no known user-visible problems associated with these bugs but both
have the potential of mutating volume claims outside of a FSM transaction. This
changeset also cleans up state mutations in some CSI tests so as to avoid having
working tests cover up potential future bugs.
This PR fixes a bug where the task group information was not being set
on the serviceHook.AllocInfo struct, which is needed later on for calculating
the CheckID of a nomad service check. The CheckID is calculated independently
from multiple callsites, and the information being passed in must be consistent,
including the group name.
The workload.AllocInfo.Group was not set at this callsite, due to the bug fixed in this PR.
https://github.com/hashicorp/nomad/blob/main/client/serviceregistration/nsd/nsd.go#L114
This PR
- fixes a panic in GetItems when looking up a variable that does not exist.
- deprecates GetItems in favor of GetVariableItems which avoids returning a pointer to a map
- deprecates ErrVariableNotFound in favor of ErrVariablePathNotFound which is an actual error type
- does some minor code cleanup to make linters happier
The `nomad fmt -check` command incorrectly writes to file because we didn't
return before writing the file on a diff. Fix this bug and update the command
internals to differentiate between the write-to-file and write-to-stdout code
paths, which are activated by different combinations of options and flags.
The docstring for the `-list` and `-write` flags is also unclear and can be
easily misread to be the opposite of the actual behavior. Clarify this and fix
up the docs to match.
This changeset also refactors the tests quite a bit so as to make the test
outputs clear when something is incorrect.
* artifact: protect against unbounded artifact decompression
Starting with 1.5.0, set defaut values for artifact decompression limits.
artifact.decompression_size_limit (default "100GB") - the maximum amount of
data that will be decompressed before triggering an error and cancelling
the operation
artifact.decompression_file_count_limit (default 4096) - the maximum number
of files that will be decompressed before triggering an error and
cancelling the operation.
* artifact: assert limits cannot be nil in validation
* Warn when Items key isn't directly accessible
Go template requires that map keys are alphanumeric for direct access
using the dotted reference syntax. This warns users when they create
keys that run afoul of this requirement.
- cli: use regex to detect invalid indentifiers in var keys
- test: fix slash in escape test case
- api: share warning formatting function between API and CLI
- ui: warn if var key has characters other than _, letter, or number
---------
Co-authored-by: Charlie Voiselle <464492+angrycub@users.noreply.github.com>
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
The eval broker's `Cancelable` method used by the cancelable eval reaper mutates
the slice of cancelable evals by removing a batch at a time from the slice. But
this method unsafely uses a read lock despite this mutation. Under normal
workloads this is likely to be safe but when the eval broker is under the heavy
load this feature is intended to fix, we're likely to have a race
condition. Switch this to a write lock, like the other locks that mutate the
eval broker state.
This changeset also adjusts the timeout to allow poorly-sized Actions runners
more time to schedule the appropriate goroutines. The test has also been updated
to use `shoenig/test/wait` so we can have sensible reporting of the results
rather than just a timeout error when things go wrong.
* users: create cache for user lookups
This PR introduces a global cache for OS user lookups. This should
relieve pressure on the OS domain/directory lookups, which would be
queried more now that Task API exists.
Hits are cached for 1 hour, and misses are cached for 1 minute. These
values are fairly arbitrary - we can tweak them if there is any reason to.
Closes#16010
* users: delete expired negative entry from cache
Fixes#14617
Dynamic Node Metadata allows Nomad users, and their jobs, to update Node metadata through an API. Currently Node metadata is only reloaded when a Client agent is restarted.
Includes new UI for editing metadata as well.
---------
Co-authored-by: Phil Renaud <phil.renaud@hashicorp.com>
* main: remove deprecated uses of rand.Seed
go1.20 deprecates rand.Seed, and seeds the rand package
automatically. Remove cases where we seed the random package,
and cleanup the one case where we intentionally create a
known random source.
* cl: update cl
* mod: update go mod
Tim Gross