ETOOBUSY 🚀 minimal blogging for the impatient
Find fishy Pods in Kubernetes
A little utility to find out fishy Pods in a Kubernetes cluster.
Here’s a handy program to figure out which Pods in a Kubernetes cluster
are still… on their way, with the possibility of getting a hint as to why
they might be prevented from going
Local version here. Save it as
kgp and put it somewhere in
Its usage is pretty straightforward: use it as if it were
pod. It will run the command for you with the options you pass on the
command line, and filter the output to only keep Pods whose state is not as
Examples (output slighly redacted for readability):
# get Pods in a weird state from any namespace $ kgp -A NAMESPACE NAME READY STATUS RESTARTS AGE polettix foobar 0/1 Pending 0 12m # get Pods in a weird state in namespace "polettix" only $ kgp -n polettix NAME READY STATUS RESTARTS AGE foobar 0/1 Pending 0 12m
Many times, though, it’s also interesting to know what is going wrong with
a Pod; an initial investigation point is usually the last event of the Pod
itself. For this reason, it’s possible to get the last event line by setting
1 (again, output slightly
redacted for readability):
$ KGP_SHOW_LAST_EVENT=1 kgp -n polettix NAME READY STATUS RESTARTS AGE foobar 0/1 Pending 0 12m [Warning] FailedScheduling:...unbound immediate PersistentVolumeClaims
I know, it can be a real hassle to do this every time, you can either set
the environment variable persistently, or you can just call the program with
a different name
kgpe (the added
e is for event):
$ ln -s kgp "$(which kgp)e" $ kgpe -n polettix NAME READY STATUS RESTARTS AGE foobar 0/1 Pending 0 12m [Warning] FailedScheduling:...unbound immediate PersistentVolumeClaims
In this way you can decide whether you want the more compact behaviour or the more verbose one.
Oh, a question!
Why would you want the compact one?
Sometimes Pods just need some time to get up and reach the
without necessarily being problematic. In these cases, the compact
behaviour prints less clutter and is perfect for running a
watch kgp -A
I hope you will never be in the condition to need this program of course… but I’m more hopeful that it will be useful in case you need to do some troubleshooting.