In my Zombienet example network definition file, I have replaced :




so now my Zombienet example network definition file is the following:

default_image = "docker.io/parity/polkadot:v0.9.18"
default_command = "polkadot"
default_args = [ "-lparachain=debug" ]

chain = "rococo-local"

  name = "alice"
  validator = true

  name = "bob"
  validator = true

id = 2000

  name = "collator01"
  image = "docker.io/paritypr/colander:master"
  command = "adder-collator"
number = "u64"
parent_hash = "Hash"
post_state = "Hash"

Now. I need to make a docker image to replace


But my new image should have adder-collator binary for adder-collator command to work.

So how can I add that adder-collator to my docker image?

That colander image is hosted here https://hub.docker.com/layers/colander/paritypr/colander/master/images/sha256-3c76e13d988aec875150e024d027af45aefc12f2de98f97db686e558a3d30513?context=explore

2 Answers 2


the adder-collator is very simple collator used for testing purposes and is compiled from the polkadot repo

cargo build --profile testnet --verbose -p test-parachain-adder-collator

And then injected into the image using this Dockerfile and published under paritypr.


  • Do I have to add this adder-collator to my parachain repo??? I didn't have it but I can run my parachain locally with 2 relay chain nodes... I am confused!
    – Russo
    Commented May 11, 2022 at 14:10
  • If I need it to run the ZombieNet test, Okay! Did you mean to run that command above in Polkadot repo, get the adder-collator binary, then copy & paste it into my parachain repo, then make a docker image for the Zombienet tests? Thanks
    – Russo
    Commented May 11, 2022 at 14:12
  • Hi, does your parachain repo compile a custom collator? Is this repo based on the available template(github.com/substrate-developer-hub/substrate-parachain-template)? Also, if you can share your repo I can check the needed config. Thanks!
    – pepoviola
    Commented May 11, 2022 at 19:01
  • Yes, mine is based on substrate parachain template
    – Russo
    Commented May 12, 2022 at 4:09

You need to add your collator command, which is target/release/parachain-collator if your parachain is based on substrate-parachain-template. Notice there is no DOT "." before the command!

  name = "collator01"
  image = "gcr.io/x-network/collator:latest"
  command = "target/release/parachain-collator"
  args = ["--parachain-id 2000"]

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.