Currently `kubectl debug` only supports passing names in command line.
However, users might want to pass resources in files by passing `-f` flag like
in all other kubectl commands.
This PR adds this ability.
* feat(debug): add more profiles
Signed-off-by: Jian Zeng <anonymousknight96@gmail.com>
* feat(debug): implment serveral debugging profiles
Including `general`, `baseline` and `restricted`.
I plan to add more profiles afterwards, but I'd like to get early
reviews.
Signed-off-by: Jian Zeng <anonymousknight96@gmail.com>
* test: add some basic tests
Signed-off-by: Jian Zeng <anonymousknight96@gmail.com>
* chore: add some helper functions
Signed-off-by: Jian Zeng <anonymousknight96@gmail.com>
* ensure pod copies always get their probes cleared
not wanting probes to be present is something we want
for all the debug profiles; so an easy place to implement
this is at the time of pod copy generation.
* ensure debug container in pod copy is added before the profile application
The way that the container list modification was defered causes the
debug container to be added after the profile applier runs. We now
make sure to have the container list modification happen before
the profile applier runs.
* make switch over pod copy, ephemeral, or node more clear
* use helper functions
added a helper function to modify a container out of a list that
matches the provided container name.
also added a helper function that adds capabilities to container
security.
* add tests for the debug profiles
* document new debugging profiles in command line help text
* add file header to profiles_test.go
* remove URL to KEP from help text
* move probe removal to the profiles
* remove mustNewProfileApplier in tests
* remove extra whiteline from import block
* remove isPodCopy helper func
* switch baselineProfile to using the modifyEphemeralContainer helper
* rename addCap to addCapability, and don't do deep copy
* fix godoc on modifyEphemeralContainer
* export DebugOptions.Applier for extensibility
* fix unit test
* fix spelling on overriden
* remove debugStyle facilities
* inline setHostNamespace helper func
* remove modifyContainer, modifyEphemeralContainer, and remove probes
their logic have been in-lined at call sites
* remove DebugApplierFunc convenience facility
* fix baseline profile implementation
it shouldn't have SYS_PTRACE base on
https://github.com/kubernetes/enhancements/tree/master/keps/sig-cli/1441-kubectl-debug#profile-baseline
* remove addCapability helper, in-lining at call sites
* address Arda's code review comments
1 use Bool instead of BoolPtr (now deprecated)
2 tweak for loop to continue when container name is not what we expect
3 use our knowledge on how the debug container is generated to simplify
our modification to the security context
4 use our knowledge on how the pod for node debugging is generated to no
longer explicit set pod's HostNework, HostPID and HostIPC fields to
false
* remove tricky defer in generatePodCopyWithDebugContainer
* provide helper functions to make debug profiles more readable
* add note to remind people about updating --profile's help text when adding new profiles
* Implement helper functions with names that improve readability
* add styleUnsupported to replace debugStyle(-1)
* fix godoc on modifyContainer
* drop style prefix from debugStyle values
* put VisitContainers in podutils & use that from debug
* cite source for ContainerType and VisitContainers
* pull in AllContainers ContainerType value
* have VisitContainer take pod spec rather than pod
* in-line modifyContainer
* unexport helper funcs
* put debugStyle at top of file
* merge profile_applier.go into profile.go
* tweak dropCapabilities
* fix allowProcessTracing & add a test for it
* drop mask param from help funcs, since we can already unambiguous identify the container by name
* fix grammar in code comment
---------
Signed-off-by: Jian Zeng <anonymousknight96@gmail.com>
Co-authored-by: Jian Zeng <anonymousknight96@gmail.com>
With the change of the CRI-O jobs to use butane, we now have a
verification for base64 data urls in place. This means that the
following URL is invalid:
```
data:text/plain;base64,GCE_SSH_PUBLIC_KEY_FILE_CONTENT
```
This means we have to pass valid base64 to the URL. To fix that, we now
allow to inject SSH key values with both, the
`GCE_SSH_PUBLIC_KEY_FILE_CONTENT` field and its base64 encoded variant.
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
The NPD test checks when NPD started to determine if it is needed to
check the kubelet start event. The current logic requires parsing the
journalctl logs which is quite fragile and is broken now because of
systemd changing the expected log format.
Newer versions of systemd do not print "end at" or "logs begin at" and
instead may print "No entries", which will result in the test panicking.
```
$ journalctl -u foo.service
-- No entries --
```
For units started, it will not print "end at" or "logs begin at":
```
root@ubuntu-jammy:~# journalctl -u foo.service
Feb 08 22:02:19 ubuntu-jammy systemd[1]: Started /usr/bin/sleep 1s.
Feb 08 22:02:20 ubuntu-jammy systemd[1]: foo.service: Deactivated successfully.
```
To avoid relying on log parsing which is fragile, let's instead directly
ask systemd when the NPD service started and parse the resulting
timestamp.
Signed-off-by: David Porter <david@porter.me>
