You’re debugging in production again. You find a process in the output of ps aux
, but you need to know which pod created that process.
First, find the process id (PID). The PID is in the second column in the output of ps aux
. We’ll call this $PID
.
Then execute:
|
|
Note: this is the same as
nsenter --target $PID --uts hostname
.
Note: Make sure to run
nsenter
on the same node asps aux
.
nsenter
is a utility for interacting
with Linux namespaces. We’re specifying $PID
as the process we want to target. For the
provided target process id, we want to enter the process’ UTS (UNIX Time-Sharing) namespace. The UTS
namespace is responsible for the
hostname and domain name. Fortunately, Kubernetes sets a hostname when creating a pod, where the
hostname is the pod’s name.
Finally, we execute the hostname
command in the process’ UTS namespace.
And we see the Kubernetes pod name printed.
Know an easier way? Let me know on LinkedIn!