本文主要是介绍/proc/sys/net/bridge/bridge-nf-call-iptables does not exist，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
ubuntu 18.04 kubeadm 初始化报错：
[init] Using Kubernetes version: v1.15.2
[preflight] Running pre-flight checks
[preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": executable file not found in $PATH
error execution phase preflight: [preflight] Some fatal errors occurred:[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist[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=...`
解决办法：
modprobe br_netfilter
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
echo 1 > /proc/sys/net/ipv4/ip_forward依然没解决，那请重启机器，一般可以解决！
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