kubernetes node节点加入容器 [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forw

问题

[root@zjj102 ~]# kubeadm join 172.16.10.101:6443 --token qnv1yd.t6md74mwcnty78uv     --discovery-token-ca-cert-hash sha256:13c8363f7beea0ee257730c981a501c222bc9a914c37331d07242149451f2f8f
W0228 13:36:38.965166   54276 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignored when control-plane flag is not set.
[preflight] Running pre-flight checks
        [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
error execution phase preflight: [preflight] Some fatal errors occurred:
        [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

解决

输入 : sysctl -w net.ipv4.ip_forward=1 就可以解决这个问题了