* kubelet: silence flag output on errors
Currently, the `--help` text is output on kubelet errors. Currently on
my machine this is 280 lines. Typically kubelet is run by systemd or
similar, starting it a loop. This means when an issue is encountered, we
are spammed by 100s of logs per second, masking the real error.
With this PR, the list of all flags is silenced. Users can still access
them by `kubelet --help` as normal. This same `SilenceUsage` is already
set in the api-server command.
* Update cmd/kubelet/app/server.go
Co-authored-by: Paco Xu <paco.xu@daocloud.io>
Co-authored-by: Paco Xu <paco.xu@daocloud.io>
As outlined in the KEP, we now graduate the Kubelet feature to beta
which means that it is enabled by default. The corresponding Kubelet
flag still defaults to `false`, but we now have the chance to e2e test
the feature by using a new serial test case.
KEP: https://github.com/kubernetes/enhancements/issues/2413
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
When adding functionality to the kubelet package and a test file, is
kind of painful to run unit tests today locally.
We usually can't run specifying the test file, as if xx_test.go and
xx.go use the same package, we need to specify all the dependencies. As
soon as xx.go uses the Kuebelet type (we need to do that to fake a
kubelet in the unit tests), this is completely impossible to do in
practice.
So the other option is to run the unit tests for the whole package or
run only a specific funtion. Running a single function can work in some
cases, but it is painful when we want to test all the functions we
wrote. On the other hand, running the test for the whole package is very
slow.
Today some unit tests try to connect to the API server (with retries)
create and list lot of pods/volumes, etc. This makes running the unit
test for the kubelet package slow.
This patch tries to make running the unit test for the whole package
more palatable. This patch adds a skip if the short version was
requested (go test -short ...), so we don't try to connect
to the API server or skip other slow tests.
Before this patch running the unit tests took in my computer (I've run
it several times so the compilation is already done):
$ time go test -v
real 0m21.303s
user 0m9.033s
sys 0m2.052s
With this patch it takes ~1/3 of the time:
$ time go test -short -v
real 0m7.825s
user 0m9.588s
sys 0m1.723s
Around 8 seconds is something I can wait to run the tests :)
Signed-off-by: Rodrigo Campos <rodrigoca@microsoft.com>
6 minute force-deatch timeout should be used only for nodes that are not
healthy.
In case a CSI driver is being upgraded or it's simply slow, NodeUnstage
can take more than 6 minutes. In that case, Pod is already deleted from the
API server and thus A/D controller will force-detach a mounted volume,
possibly corrupting the volume and breaking CSI - a CSI driver expects
NodeUnstage to succeed before Kubernetes can call ControllerUnpublish.
The code as it stands now works, but it is still complicated and previous
versions had race
conditions (https://github.com/kubernetes/kubernetes/issues/108040). Now the
test works without modifying global state. The individual test cases could run
in parallel, this just isn't done because they complete quickly already (2
seconds).
- `cert-dir` could be specified to a value other than the default value
- we have tests that should be executed successfully on the working cluster
Signed-off-by: Dave Chen <dave.chen@arm.com>
Before:
findDisk()
fcPathExp := "^(pci-.*-fc|fc)-0x" + wwn + "-lun-" + lun
After:
findDisk()
fcPathExp := "^(pci-.*-fc|fc)-0x" + wwn + "-lun-" + lun + "$"
fc path may have the same wwns but different luns.for example:
pci-0000:41:00.0-fc-0x500a0981891b8dc5-lun-1
pci-0000:41:00.0-fc-0x500a0981891b8dc5-lun-12
Function findDisk() may mismatch the fc path, return the wrong device and wrong associated devicemapper parent.
This may cause a disater that pods attach wrong disks. Accutally it happended in my testing environment before.
