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RKE2 / rancherd commands

RKE2 commands

Install

curl -sL https://get.rke2.io | sh
systemctl daemon-reload
systemctl start rke2-server

Various exploration/debug commmands for RKE2

binaries

$ ls -la /var/lib/rancher/rke2/bin/
total 263716
drwxr-xr-x 2 root root      4096 Oct  9 15:53 .
drwxr-xr-x 3 root root      4096 Oct  9 15:53 ..
-rwxr-xr-x 1 root root  35422984 Oct  9 15:53 containerd
-rwxr-xr-x 1 root root   7204400 Oct  9 15:53 containerd-shim
-rwxr-xr-x 1 root root  10247488 Oct  9 15:53 containerd-shim-runc-v1
-rwxr-xr-x 1 root root  10255744 Oct  9 15:53 containerd-shim-runc-v2
-rwxr-xr-x 1 root root  21173056 Oct  9 15:53 crictl
-rwxr-xr-x 1 root root  18724136 Oct  9 15:53 ctr
-rwxr-xr-x 1 root root  44474208 Oct  9 15:52 kubectl
-rwxr-xr-x 1 root root 111544592 Oct  9 15:53 kubelet
-rwxr-xr-x 1 root root  10683624 Oct  9 15:53 runc
-rwxr-xr-x 1 root root    285008 Oct  9 15:53 socat

tar.gz install contents

/usr/local/share/
/usr/local/share/rke2/
/usr/local/share/rke2/rke2-cis-sysctl.conf
/usr/local/share/rke2/LICENSE.txt
/usr/local/bin/
/usr/local/bin/rke2
/usr/local/bin/rke2-uninstall.sh
/usr/local/bin/rke2-killall.sh
/usr/local/lib/
/usr/local/lib/systemd/
/usr/local/lib/systemd/system/
/usr/local/lib/systemd/system/rke2-server.service
/usr/local/lib/systemd/system/rke2-agent.service

systemd

  • /usr/local/lib/systemd/system/rke2-server.service

kubeconfig

export KUBECONFIG=/etc/rancher/rke2/rke2.yaml
/var/lib/rancher/rke2/bin/kubectl get nodes
/var/lib/rancher/rke2/bin/kubectl --kubeconfig /etc/rancher/rke2/rke2.yaml get nodes

containerd

  • socket located at /run/k3s/containerd/containerd.sock

ctr

List containers using ctr

/var/lib/rancher/rke2/bin/ctr --address /run/k3s/containerd/containerd.sock --namespace k8s.io container ls

crictl

export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
/var/lib/rancher/rke2/bin/crictl ps
/var/lib/rancher/rke2/bin/crictl --config /var/lib/rancher/rke2/agent/etc/crictl.yaml ps
/var/lib/rancher/rke2/bin/crictl --runtime-endpoint unix:///run/k3s/containerd/containerd.sock ps -a

logging

  • journalctl -f -u rke2-server
  • /var/lib/rancher/rke2/agent/containerd/containerd.log
  • /var/lib/rancher/rke2/agent/logs/kubelet.log

etcd

export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
  • etcdctl check perf
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer sh -c "ETCDCTL_ENDPOINTS='https://127.0.0.1:2379' ETCDCTL_CACERT='/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt' ETCDCTL_CERT='/var/lib/rancher/rke2/server/tls/etcd/server-client.crt' ETCDCTL_KEY='/var/lib/rancher/rke2/server/tls/etcd/server-client.key' ETCDCTL_API=3 etcdctl check perf"
  • etcdctl endpoint status
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer sh -c "ETCDCTL_ENDPOINTS='https://127.0.0.1:2379' ETCDCTL_CACERT='/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt' ETCDCTL_CERT='/var/lib/rancher/rke2/server/tls/etcd/server-client.crt' ETCDCTL_KEY='/var/lib/rancher/rke2/server/tls/etcd/server-client.key' ETCDCTL_API=3 etcdctl endpoint status --cluster --write-out=table"
  • etcdctl endpoint health
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer sh -c "ETCDCTL_ENDPOINTS='https://127.0.0.1:2379' ETCDCTL_CACERT='/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt' ETCDCTL_CERT='/var/lib/rancher/rke2/server/tls/etcd/server-client.crt' ETCDCTL_KEY='/var/lib/rancher/rke2/server/tls/etcd/server-client.key' ETCDCTL_API=3 etcdctl endpoint health --cluster --write-out=table"
  • etcdctl alarm list
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer sh -c "ETCDCTL_ENDPOINTS='https://127.0.0.1:2379' ETCDCTL_CACERT='/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt' ETCDCTL_CERT='/var/lib/rancher/rke2/server/tls/etcd/server-client.crt' ETCDCTL_KEY='/var/lib/rancher/rke2/server/tls/etcd/server-client.key' ETCDCTL_API=3 etcdctl alarm list"
  • curl metrics
curl -L --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key https://127.0.0.1:2379/metrics
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