1. Kubectl run nginx --image=nginx --command -- echo "hello" 2. Kubectl run ngin . . .

Kubernetes-Slack Discussions
#1

Ceci Ivanov:

  1. Kubectl run nginx --image=nginx --command – echo “hello”
  2. Kubectl run nginx --image=nginx – echo “hello”
    I ran them with --dry-run=client -o yaml and saw that on the first one command there is spec in the containers
    -command:
    -echo
    -hello

but on the 2nd one there is spec
-args:
-echo
-hello

#2

Marko Eremija:
the first one is to run a command (override the one coming with Docker image), and the second one just adds arguments to the default command provided by the Docker image

#3

Marko Eremija:
at least that’s how I read it :slightly_smiling_face:

#4

Ceci Ivanov:
ooh ok but what is the default command coming with docker image?

#5

Bishop Mbong:
to see the default command, look at the dockerfile

#6

Ceci Ivanov:
I suppose there shouldn’t be some specified default, yeah I thought about docker file but where I can find this docker file as I run just Kubectl and creating pod

#7

Marko Eremija:
it’s usually under the ENTRYPOINT

#8

Marko Eremija:
ok, Docker file, i.e., the image you are using to create the Pod

#9

Marko Eremija:
you can use docker inspect <image_name> and look for the ENTRYPOINT

#10

Ceci Ivanov:
ok thank you

#11

unnivkn:
Hi @Ceci Ivanov fyr:

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