The `operator debug` command writes JSON files from API responses as a single
line containing an array of JSON objects. But some of these files can be
extremely large (GB's) for large production clusters, which makes it difficult
to parse them using typical line-oriented Unix command line tools that can
stream their inputs without consuming a lot of memory.
For collections that are typically large, instead emit newline-delimited JSON.
This changeset includes some first-pass refactoring of this command. It breaks
up monolithic methods that validate a path, create a file, serialize objects,
and write them to disk into smaller functions, some of which can now be
standalone to take advantage of generics.
Operators may have a setup whereby the TLS config comes from a
source other than setting Nomad specific env vars. In this case,
we should attempt to identify the scheme using the config setting
as a fallback.
* Added task links to various alloc tables
* Lintfix
* Border collapse and added to task group page
* Logs icon temporarily removed and localStorage added
* Mock task added to test
* Delog
* Two asserts in new test
* Remove commented-out code
* Changelog
* Removing args.allocation deps
* First attempt at stabilizing percy snapshots with faker
* Tokens seed moved to before management token generation
* Faker seed only in token test
* moving seed after storage clear
* And again, but back to no faker seeding
* Isolated seed and temporary log
* Setting seed(1) wherever we're snapshotting, or before establishing cluster scenarios
* Deliberate noop to see if percy is stable
* Changelog entry
* scheduler: stopped-yet-running allocs are still running
* scheduler: test new stopped-but-running logic
* test: assert nonoverlapping alloc behavior
Also add a simpler Wait test helper to improve line numbers and save few
lines of code.
* docs: tried my best to describe #10446
it's not concise... feedback welcome
* scheduler: fix test that allowed overlapping allocs
* devices: only free devices when ClientStatus is terminal
* test: output nicer failure message if err==nil
Co-authored-by: Mahmood Ali <mahmood@hashicorp.com>
Co-authored-by: Michael Schurter <mschurter@hashicorp.com>
A Nomad user reported problems with CSI volumes associated with failed
allocations, where the Nomad server did not send a controller unpublish RPC.
The controller unpublish is skipped if other non-terminal allocations on the
same node claim the volume. The check has a bug where the allocation belonging
to the claim being freed was included in the check incorrectly. During a normal
allocation stop for job stop or a new version of the job, the allocation is
terminal. But allocations that fail are not yet marked terminal at the point in
time when the client sends the unpublish RPC to the server.
For CSI plugins that support controller attach/detach, this means that the
controller will not be able to detach the volume from the allocation's host and
the replacement claim will fail until a GC is run. This changeset fixes the
conditional so that the claim's own allocation is not included, and makes the
logic easier to read. Include a test case covering this path.
Also includes two minor extra bugfixes:
* Entities we get from the state store should always be copied before
altering. Ensure that we copy the volume in the top-level unpublish workflow
before handing off to the steps.
* The list stub object for volumes in `nomad/structs` did not match the stub
object in `api`. The `api` package also did not include the current
readers/writers fields that are expected by the UI. True up the two objects and
add the previously undocumented fields to the docs.
This PR modifies RandomStagger to protect against negative input
values. If the given interval is negative, the value returned will
be somewhere in the stratosphere. Instead, treat negative inputs
like zero, returning zero.
When configuring Consul Service Mesh, it's sometimes necessary to
provide dynamic value that are only known to Nomad at runtime. By
interpolating configuration values (in addition to configuration keys),
user are able to pass these dynamic values to Consul from their Nomad
jobs.
Nomad's original autopilot was importing from a private package in Consul. It
has been moved out to a shared library. Switch Nomad to use this library so that
we can eliminate the import of Consul, which is necessary to build Nomad ENT
with the current version of the Consul SDK. This also will let us pick up
autopilot improvements shared with Consul more easily.
These options are mutually exclusive but, since `-hcl2-strict` defaults
to `true` users had to explicitily set it to `false` when using `-hcl1`.
Also return `255` when job plan fails validation as this is the expected
code in this situation.
This PR refactors the cgroups v2 group kill code path to use the
cgroups.kill interface file for destroying the cgroup. Previously
we copied the freeze + sigkill + unfreeze pattern from the v1 code,
but v2 provides a more efficient and more race-free way to handle
this.
Closes#14371
Nomad reconciles services it expects to be registered in Consul with
what is actually registered in the local Consul agent. This is necessary
to prevent leaking service registrations if Nomad crashes at certain
points (or if there are bugs).
When Consul has namespaces enabled, we must iterate over each available
namespace to be sure no services were leaked into non-default
namespaces.
Since this reconciliation happens often, there's no need to require
results from the Consul leader server. In large clusters this creates
far more load than the "freshness" of the response is worth.
Therefore this patch switches the request to AllowStale=true
This PR refactors the code path in Client startup for setting up the cpuset
cgroup manager (non-linux systems not affected).
Before, there was a logic bug where we would try to read the cpuset.cpus.effective
cgroup interface file before ensuring nomad's parent cgroup existed. Therefor that
file would not exist, and the list of useable cpus would be empty. Tasks started
thereafter would not have a value set for their cpuset.cpus.
The refactoring fixes some less than ideal coding style. Instead we now bootstrap
each cpuset manager type (v1/v2) within its own constructor. If something goes
awry during bootstrap (e.g. cgroups not enabled), the constructor returns the
noop implementation and logs a warning.
Fixes#14229
Now that tasks that have finished running can be restarted, the UI needs
to use the actual task state to determine which CSS class to use when
rendering the task lifecycle chart element.
* allocrunner: handle lifecycle when all tasks die
When all tasks die the Coordinator must transition to its terminal
state, coordinatorStatePoststop, to unblock poststop tasks. Since this
could happen at any time (for example, a prestart task dies), all states
must be able to transition to this terminal state.
* allocrunner: implement different alloc restarts
Add a new alloc restart mode where all tasks are restarted, even if they
have already exited. Also unifies the alloc restart logic to use the
implementation that restarts tasks concurrently and ignores
ErrTaskNotRunning errors since those are expected when restarting the
allocation.
* allocrunner: allow tasks to run again
Prevent the task runner Run() method from exiting to allow a dead task
to run again. When the task runner is signaled to restart, the function
will jump back to the MAIN loop and run it again.
The task runner determines if a task needs to run again based on two new
task events that were added to differentiate between a request to
restart a specific task, the tasks that are currently running, or all
tasks that have already run.
* api/cli: add support for all tasks alloc restart
Implement the new -all-tasks alloc restart CLI flag and its API
counterpar, AllTasks. The client endpoint calls the appropriate restart
method from the allocrunner depending on the restart parameters used.
* test: fix tasklifecycle Coordinator test
* allocrunner: kill taskrunners if all tasks are dead
When all non-poststop tasks are dead we need to kill the taskrunners so
we don't leak their goroutines, which are blocked in the alloc restart
loop. This also ensures the allocrunner exits on its own.
* taskrunner: fix tests that waited on WaitCh
Now that "dead" tasks may run again, the taskrunner Run() method will
not return when the task finishes running, so tests must wait for the
task state to be "dead" instead of using the WaitCh, since it won't be
closed until the taskrunner is killed.
* tests: add tests for all tasks alloc restart
* changelog: add entry for #14127
* taskrunner: fix restore logic.
The first implementation of the task runner restore process relied on
server data (`tr.Alloc().TerminalStatus()`) which may not be available
to the client at the time of restore.
It also had the incorrect code path. When restoring a dead task the
driver handle always needs to be clear cleanly using `clearDriverHandle`
otherwise, after exiting the MAIN loop, the task may be killed by
`tr.handleKill`.
The fix is to store the state of the Run() loop in the task runner local
client state: if the task runner ever exits this loop cleanly (not with
a shutdown) it will never be able to run again. So if the Run() loops
starts with this local state flag set, it must exit early.
This local state flag is also being checked on task restart requests. If
the task is "dead" and its Run() loop is not active it will never be
able to run again.
* address code review requests
* apply more code review changes
* taskrunner: add different Restart modes
Using the task event to differentiate between the allocrunner restart
methods proved to be confusing for developers to understand how it all
worked.
So instead of relying on the event type, this commit separated the logic
of restarting an taskRunner into two methods:
- `Restart` will retain the current behaviour and only will only restart
the task if it's currently running.
- `ForceRestart` is the new method where a `dead` task is allowed to
restart if its `Run()` method is still active. Callers will need to
restart the allocRunner taskCoordinator to make sure it will allow the
task to run again.
* minor fixes
The `namespace` field was not included in the equality check between old and new
Vault configurations, which meant that a Vault config change that only changed
the namespace would not be detected as a change and the clients would not be
reloaded.
Also, the comparison for boolean fields such as `enabled` and
`allow_unauthenticated` was on the pointer and not the value of that pointer,
which results in spurious reloads in real config reload that is easily missed in
typical test scenarios.
Includes a minor refactor of the order of fields for `Copy` and `Merge` to match
the struct fields in hopes it makes it harder to make this mistake in the
future, as well as additional test coverage.
This PR causes the logmon task runner to acquire the binary of the
Nomad executable in an 'init' block, so as to almost certainly get
the name while the nomad file still exists.
This is an attempt at fixing the case where a deleted Nomad file
(e.g. during upgrade) may be getting renamed with a mysterious
suffix first.
If this doesn't work, as a last resort we can literally just trim
the mystery string.
Fixes: #14079
This PR documents a change made in the enterprise version of nomad that addresses the following issue:
When a user tries to filter audit logs, they do so with a stanza that looks like the following:
audit {
enabled = true
filter "remove deletes" {
type = "HTTPEvent"
endpoints = ["*"]
stages = ["OperationComplete"]
operations = ["DELETE"]
}
}
When specifying both an "endpoint" and a "stage", the events with both matching a "endpoint" AND a matching "stage" will be filtered.
When specifying both an "endpoint" and an "operation" the events with both matching a "endpoint" AND a matching "operation" will be filtered.
When specifying both a "stage" and an "operation" the events with a matching a "stage" OR a matching "operation" will be filtered.
The "OR" logic with stages and operations is unexpected and doesn't allow customers to get specific on which events they want to filter. For instance the following use-case is impossible to achieve: "I want to filter out all OperationReceived events that have the DELETE verb".
This PR activates the osuergo build tag in GNUMakefile. This forces the os/user
package to be compiled without CGO. Doing so seems to resolve a race condition
in getpwnam_r that causes alloc creation to hang or panic on `user.Lookup("nobody")`.
The current implementation uses the task's finishedAt field to determine
if a task is active of not, but this check is not accurate. A task in
the "pending" state will not have finishedAt value but it's also not
active.
This discrepancy results in some components, like the inline stats chart
of the task row component, to be displayed even whey they shouldn't.
The original design for workload identities and ACLs allows for operators to
extend the automatic capabilities of a workload by using a specially-named
policy. This has shown to be potentially unsafe because of naming collisions, so
instead we'll allow operators to explicitly attach a policy to a workload
identity.
This changeset adds workload identity fields to ACL policy objects and threads
that all the way down to the command line. It also a new secondary index to the
ACL policy table on namespace and job so that claim resolution can efficiently
query for related policies.
When a Nomad agent starts and loads jobs that already existed in the
cluster, the default template uid and gid was being set to 0, since this
is the zero value for int. This caused these jobs to fail in
environments where it was not possible to use 0, such as in Windows
clients.
In order to differentiate between an explicit 0 and a template where
these properties were not set we need to use a pointer.
* Initialized keyboard service
Neat but funky: dynamic subnav traversal
👻
generalized traverseSubnav method
Shift as special modifier key
Nice little demo panel
Keyboard shortcuts keycard
Some animation styles on keyboard shortcuts
Handle situations where a link is deeply nested from its parent menu item
Keyboard service cleanup
helper-based initializer and teardown for new contextual commands
Keyboard shortcuts modal component added and demo-ghost removed
Removed j and k from subnav traversal
Register and unregister methods for subnav plus new subnavs for volumes and volume
register main nav method
Generalizing the register nav method
12762 table keynav (#12975)
* Experimental feature: shortcut visual hints
* Long way around to a custom modifier for keyboard shortcuts
* dynamic table and list iterative shortcuts
* Progress with regular old tether
* Delogging
* Table Keynav tether fix, server and client navs, and fix to shiftless on modified arrow keys
Go to Optimize keyboard link and storage key changed to g r
parameterized jobs keyboard nav
Dynamic numeric keynav for multiple tables (#13482)
* Multiple tables init
* URL-bind enumerable keyboard commands and add to more taskRow and allocationRows
* Type safety and lint fixes
* Consolidated push to keyCommands
* Default value when removing keyCommands
* Remove the URL-based removal method and perform a recompute on any add
Get tests passing in Keynav: remove math helpers and a few other defensive moves (#13761)
* Remove ember math helpers
* Test fixes for jobparts/body
* Kill an unneeded integration helper test
* delog
* Trying if disabling percy lets this finish
* Okay so its not percy; try parallelism in circle
* Percyless yet again
* Trying a different angle to not have percy
* Upgrade percy to 1.6.1
[ui] Keyboard nav: "u" key to go up a level (#13754)
* U to go up a level
* Mislabelled my conditional
* Custom lint ignore rule
* Custom lint ignore rule, this time with commas
* Since we're getting rid of ember math helpers elsewhere, do the math ourselves here
Replace ArrowLeft etc. with an ascii arrow (#13776)
* Replace ArrowLeft etc. with an ascii arrow
* non-mutative helper cleanup
Keyboard Nav: let users rebind their shortcuts (#13781)
* click-outside and shortcuts enabled/disabled toggle
* Trap focus when modal open
* Enabled/disabled saved to localStorage
* Autofocus edit button on variable index
* Modal overflow styles
* Functional rebind
* Saving rebinds to localStorage for all majors
* Started on defaultCommandBindings
* Modal header style and cancel rebind on escape
* keyboardable keybindings w buttons instead of spans
* recording and defaultvalues
* Enter short-circuits rebind
* Only some commands are rebindable, and dont show dupes
* No unused get import
* More visually distinct header on modal
* Disallowed keys for rebind, showing buffer as you type, and moving dedupe to modal logic
willDestroy hook to prevent tests from doubling/tripling up addEventListener on kb events
remove unused tests
Keyboard Navigation acceptance tests (#13893)
* Acceptance tests for keyboard modal
* a11y audit fix and localStorage clear
* Bind/rebind/localStorage tests
* Keyboard tests for dynamic nav and tables
* Rebinder and assert expectation
* Second percy snapshot showing hints no longer relevant
Weird issue where linktos with query props specifically from the task-groups page would fail to route / hit undefined.shouldSuperCede errors
Adds the concept of exclusivity to a keycommand, removing peers that also share its label
Lintfix
Changelog and PR feedback
Changelog and PR feedback
Fix to rebinding in firefox by blurring the now-disabled button on rebind (#14053)
* Secure Variables shortcuts removed
* Variable index route autofocus removed
* Updated changelog entry
* Updated changelog entry
* Keynav docs (#14148)
* Section added to the API Docs UI page
* Added a note about disabling
* Prev and Next order
* Remove dev log and unneeded comments
Tim Gross