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solveit
Asked: 2021-08-03 20:42:46 +0800 CST

How can I delete manually calicoctl and iptables created by calico from my k3s setup

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I have a K3s setup with calico pods [calico-node- & calico-kube-controllers-] running. On uninstalling K3s, calico pods get deleted but I see that calicoctl and iptables -S commands still running and shows data.

I want to delete calico (including calicoctl and Iptables created by calico) completely. Which commands will help me to do so ?

K3s uninstalltion command: /usr/local/bin/k3s-uninstall.sh deletes all k3s pods including calico, but calicoctl and iptables -S still works.

PS: I already tried few things -

  1. Command kubectl delete -f https://raw.githubusercontent.com/aws/amazon-vpc-cni-k8s/release-1.5/config/v1.5/calico.yaml deletes the calico-node- but calico-kube-controller , calicoctl and iptables -S are still present
  2. Kubectl delete commands in this que also not working for me, after executing these two commands still calicoctl and iptables -S are present
kubernetes k3s calico

2 Answers

  1. Best Answer

    Deleting calico-Iptables:

    Use calico-policy and add below lines at the end of script:

    echo "Flush remaining calico iptables"
iptables-save | grep -i cali | iptables -F

echo "Delete remaining calico iptables"
iptables-save | grep -i cali | iptables -X

    This will delete all calico iptables when you check with iptables -S

    Note: Run this script only after uninstalling K3S.

    Deleting calicoctl:

    Simply run sudo rm $(which calicoctl) command, it will find and delete the calicoctl.

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  2. Here you will find a dedicated script that will remove whole calico policy. Everything you need should be in the script.

    Edit: completely guide you can find here

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