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dcoker启动报错经常能看到 205/limit这个错误提示，这是告诉你linux操作系统的文件描述符设置的和docker的不匹配，或者是设置的比较小了。
解决方案
linux中一切皆文件。例如一个socket都会用一个文件描述符去表示，所以linux系统文件描述符的大小，对系统是至关重要的，例如高并发的时候，如果文件描述符太小，服务器的并发是上不去的。
要解决 205/limit 可以使用两种方式。
- 修改系统文件描述符
vim /etc/sysctl.conf：
# sysctl settings are defined through files in # /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/. # # vendors settings live in /usr/lib/sysctl.d/. # to override a whole file, create a new file with the same in # /etc/sysctl.d/ and put new settings there. to override # only specific settings, add a file with a lexically later # name in /etc/sysctl.d/ and put new settings there. # # for more information, see sysctl.conf(5) and sysctl.d(5). fs.file-max =6553600 # 这里按照实际情况填写。 fs.nr_open = 6553600
修改文件使用执行命令sysctl -p命令让设置的内容生效，并重启docker systemctl restart docker
- 修改docker的docker.service文件路径
/usr/lib/systemd/system/docker.service文件中对文件描述符的配置，可以修改的比系统配置的最大文件描述符小一些
[unit] description=docker application container engine documentation=https://docs.docker.com bindsto=containerd.service after=network-online.target firewalld.service containerd.service wants=network-online.target requires=docker.socket [service] type=notify # the default is not to use systemd for cgroups because the delegate issues still # exists and systemd currently does not support the cgroup feature set required # for containers run by docker execstart=/usr/bin/dockerd --exec-opt=native.cgroupdriver=cgroupfs --log-level=warn --log-opt max-size=50m --storage-driver=overlay2 -h fd:// --containerd=/run/containerd/containerd.sock -h unix:///var/run/docker.sock -h tcp://0.0.0.0:900 --data-root=/data1/docker_customized execreload=/bin/kill -s hup $mainpid timeoutsec=0 restartsec=2 restart=always # note that startlimit* options were moved from "service" to "unit" in systemd 229. # both the old, and new location are accepted by systemd 229 and up, so using the old location # to make them work for either version of systemd. startlimitburst=3 # note that startlimitinterval was renamed to startlimitintervalsec in systemd 230. # both the old, and new name are accepted by systemd 230 and up, so using the old name to make # this option work for either version of systemd. startlimitinterval=60s # having non-zero limit*s causes performance problems due to accounting overhead # in the kernel. we recommend using cgroups to do container-local accounting. limitnofile=6553500 # 修改这里 limitnproc=infinity limitcore=infinity # comment tasksmax if your systemd version does not supports it. # only systemd 226 and above support this option. tasksmax=infinity # set delegate yes so that systemd does not reset the cgroups of docker containers delegate=yes # kill only the docker process, not all processes in the cgroup killmode=process [install] wantedby=multi-user.target
修改完docker后，可能还需要修改containerd的启动配置文件， 文件路径/usr/lib/systemd/system/containerd.service
[unit] description=containerd container runtime documentation=https://containerd.io after=network.target [service] execstartpre=-/sbin/modprobe overlay execstart=/usr/bin/containerd killmode=process delegate=yes limitnofile=6553500 # 修改这里 # having non-zero limit*s causes performance problems due to accounting overhead # in the kernel. we recommend using cgroups to do container-local accounting. limitnproc=infinity limitcore=infinity tasksmax=infinity [install] wantedby=multi-user.target
修改文件后先执行 systemctl daemon-reload 然后执行 systemctl restart docker docker 正常启动。
以上就是docker启动报错205/limit的解决方案的详细内容，更多关于docker启动报错205/limit的资料请关注代码网其它相关文章！
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