Failed to start Docker Application Container Engine
错误如下：
root@el70 docker\]# systemctl start docker.service Job for docker.service failed because start of the service was attempted too often. See "systemctl status docker.service" and "journalctl -xe" for details. To force a start use "systemctl reset-failed docker.service" followed by "systemctl start docker.service" again. \[root@el70 docker\]# journalctl -xe Feb 06 16:15:36 el70 dockerd\[2524\]: time="2024-02-06T16:15:36.044378290+08:00" level=info msg="\[core\] \[Channel #1\] Channel deleted" module=grp Feb 06 16:15:36 el70 dockerd\[2524\]: time="2024-02-06T16:15:36.044158542+08:00" level=info msg="stopping event stream following graceful shutdo Feb 06 16:15:36 el70 dockerd\[2524\]: time="2024-02-06T16:15:36.044822884+08:00" level=info msg="\[core\] \[Channel #7 SubChannel #8\] Subchannel Co Feb 06 16:15:36 el70 dockerd\[2524\]: time="2024-02-06T16:15:36.044928467+08:00" level=info msg="\[core\] \[Channel #7\] Channel Connectivity change Feb 06 16:15:37 el70 dockerd\[2524\]: failed to start daemon: Error initializing network controller: Error creating default "bridge" network: Fa Feb 06 16:15:37 el70 systemd\[1\]: docker.service: main process exited, code=exited, status=1/FAILURE Feb 06 16:15:37 el70 systemd\[1\]: Failed to start Docker Application Container Engine. -- Subject: Unit docker.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit docker.service has failed. -- -- The result is failed. Feb 06 16:15:37 el70 systemd\[1\]: Unit docker.service entered failed state. Feb 06 16:15:37 el70 systemd\[1\]: docker.service failed. Feb 06 16:15:37 el70 systemd\[1\]: docker.service holdoff time over, scheduling restart. Feb 06 16:15:37 el70 systemd\[1\]: Stopped Docker Application Container Engine. -- Subject: Unit docker.service has finished shutting down -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit docker.service has finished shutting down. Feb 06 16:15:37 el70 systemd\[1\]: start request repeated too quickly for docker.service Feb 06 16:15:37 el70 systemd\[1\]: Failed to start Docker Application Container Engine. -- Subject: Unit docker.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 解决分析过程： 再打开一个ssh连接窗口，执行命令**tail -200f /var/log/messages** **然后在原窗口中执行 systemctl start docker 观察新窗口中的日志。** 我这里看到的有关错误日志内容如下： Feb 6 16:22:54 el70 firewalld: 2024-02-06 16:22:54 ERROR: INVALID_TYPE: structure size mismatch 16 != 13 Feb 6 16:22:54 el70 firewalld: 2024-02-06 16:22:54 ERROR: COMMAND_FAILED: '/sbin/iptables -t filter -C FORWARD -j DOCKER-ISOLATION' failed: iptables v1.4.21: Couldn't load target \`DOCKER-ISOLATION':No such file or directory Try \`iptables -h' or 'iptables --help' for more information. Feb 6 16:22:54 el70 firewalld: 2024-02-06 16:22:54 ERROR: COMMAND_FAILED: '/sbin/iptables -t nat -D PREROUTING -m addrtype --dst-type LOCAL -j DOCKER' failed: iptables: No chain/target/match by that name. Feb 6 16:22:54 el70 firewalld: 2024-02-06 16:22:54 ERROR: COMMAND_FAILED: '/sbin/iptables -t nat -D OUTPUT -m addrtype --dst-type LOCAL ! --dst 127.0.0.0/8 -j DOCKER' failed: iptables: No chain/target/match by that name. 然后我尝试： \[root@el70 docker\]# service iptables stop Redirecting to /bin/systemctl stop iptables.service Failed to stop iptables.service: Unit iptables.service not loaded. 原来这个服务不存在，因为我的环境不需要防火墙，因此，我直接执行service firewalld stop 将防火墙关闭。 再次systemctl start docker 启动正常。 --------------------------------- 其他错误，修改/etc/docker/daemon.json后，重启docker失败 启动失败，错误为：Feb 6 16:37:34 el70 systemd: Starting Docker Application Container Engine... Feb 6 16:37:34 el70 dockerd: unable to configure the Docker daemon with file /etc/docker/daemon.json: the following directives are specified both as a flag and in the configuration file: insecure-registries: (from flag: \[127.0.0.1\], from file: \[xx.xx.xx.xx:8080\]) 原因： 因为修改了/etc/docker/daemon.json 内容为如下 { "insecure-registries":\["xx.xx.xx.xx:8080"
}
而/etc/systemd/system/docker.service 中也配置了ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=xx.xx.xx.xx:8080
将ExecStart这一行修改为：
ExecStart=/usr/bin/dockerd --selinux-enabled=false
然后systemctl daemon-reload ，再次 systemctl start docker即可启动
其他错误2：
Feb 6 17:12:34 el70 dockerd: time="2024-02-06T17:12:34.353598727+08:00" level=error msg="Download failed after 1 attempts: error parsing HTTP 408 response body: invalid character '<' looking for beginning of value: \"<html><body><h1>408 Request Time-out</h1>\\nYour browser didn't send a complete request in time.\\n</body></html>
解决方法：
修改配置文件 /etc/docker/daemon.json 增加
"registry-mirrors": ["http://hub-mirror.c.163.com"]
修改后的全内容为：
{
"insecure-registries":["xx.xx.xx.xx:8080"],
"registry-mirrors": ["http://hub-mirror.c.163.com"]
}
然后重启docker服务，有时候失败了要先执行一下systemctl reset-failed docker.service 清理掉失败状态。再进行systemctl start docker尝试。
参考文章：
Docker启动失败报错Failed to start Docker Application Container Engine的解决办法_docker_脚本之家