今天在更新了WSL2上的Ubuntu22.04版本，在安装Docker后无法启动，查看Docker的日志显示如下的错误
INFO[2022-04-22T16:14:55.718999500+08:00] stopping event stream following graceful shutdown error="<nil>" module=libcontainerd namespace=moby
INFO[2022-04-22T16:14:55.719787400+08:00] stopping event stream following graceful shutdown error="context canceled" module=libcontainerd namespace=plugins.moby
INFO[2022-04-22T16:14:55.719906400+08:00] stopping healthcheck following graceful shutdown module=libcontainerd
failed to start daemon: Error initializing network controller: error obtaining controller instance: unable to add return rule in DOCKER-ISOLATION-STAGE-1 chain: (iptables failed: iptables --wait -A DOCKER-ISOLATION-STAGE-1 -j RETURN: iptables v1.8.7 (nf_tables): RULE_APPEND failed (No such file or directory): rule in chain DOCKER-ISOLATION-STAGE-1
(exit status 4))原因是由于新的ubuntu系统使用了iptables-nft，而WSL2不支持导致的。
可以通过以下命令进行修改
sudo update-alternatives --config iptables
There are 2 choices for the alternative iptables (providing /usr/sbin/iptables).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/sbin/iptables-nft 20 auto mode
1 /usr/sbin/iptables-legacy 10 manual mode
2 /usr/sbin/iptables-nft 20 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/sbin/iptables-legacy to provide /usr/sbin/iptables (iptables) in manual mode修改完成后重启Docker服务即可。
