FAQ

This section is mean to answer the most frequently asked questions about sealer. And it will be updated regularly.

How to clean host environment manually when sealer apply failed.

in some case ,when you failed to run sealer apply ,and the hints show a little that is not enough to use, this section
will guild you how to clean your host manually.

you may follow the below clean steps when run kubeadm init failed.

umount rootfs or apply mount if it existed

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df -h | grep sealer
overlay          40G  7.3G   31G  20% /var/lib/sealer/data/my-cluster/rootfs

umount examples:

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umount /var/lib/sealer/data/my-cluster/rootfs

delete rootfs directory if it existed

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rm -rf /var/lib/sealer/data/my-cluster

delete kubernetes directory if it existed

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rm -rf /etc/kubernetes
rm -rf /etc/cni
rm -rf /opt/cni

delete docker registry if it existed

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docker ps
docker rm -f -v sealer-registry

you may follow the below clean steps if your cluster is up.

kubeadm reset

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kubeadm reset -f

delete kube config and kubelet if it existed

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rm -rf $HOME/.kube/config
rm -rf ~/.kube/ && rm -rf /etc/kubernetes/ && \
rm -rf /etc/systemd/system/kubelet.service.d && rm -rf /etc/systemd/system/kubelet.service && \
rm -rf /usr/bin/kube* && rm -rf /usr/bin/crictl && \
rm -rf /etc/cni && rm -rf /opt/cni && \
rm -rf /var/lib/etcd && rm -rf /var/etcd