解决 docker 报错: Error starting daemon: error initializing graphdriver: backing file system is unsuppor
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CentOS 7.5 x64下
sudo yum install docker -y systemctl enable docker systemctl start docker
发现启动失败
journalctl -xe
查询获得报错
Jan 11 22:49:16 localhost.localdomain dockerd-current[29403]: time="2019-01-11T22:49:16.686305029+08:00" level=info msg="libcontainerd: new containerd process, pid: 29410"
Jan 11 22:49:17 localhost.localdomain dockerd-current[29403]: time="2019-01-11T22:49:17.696062387+08:00" level=error msg="‘overlay2‘ requires kernel 4.7 to use on btrfs"
Jan 11 22:49:17 localhost.localdomain dockerd-current[29403]: Error starting daemon: error initializing graphdriver: backing file system is unsupported for this graph driver
docker.service: main process exited, code=exited, status=1/FAILURE Failed to start Docker Application Container Engine.
然后搜索了一番,暂时没找到。 然后就自己研究一下。
cat /etc/systemd/system/multi-user.target.wants/docker.service [Unit] Description=Docker Application Container Engine Documentation=http://docs.docker.com After=network.target Wants=docker-storage-setup.service Requires=docker-cleanup.timer [Service] Type=notify NotifyAccess=main EnvironmentFile=-/run/containers/registries.conf EnvironmentFile=-/etc/sysconfig/docker EnvironmentFile=-/etc/sysconfig/docker-storage EnvironmentFile=-/etc/sysconfig/docker-network Environment=GOTRACEBACK=crash Environment=DOCKER_HTTP_HOST_COMPAT=1 Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-opt native.cgroupdriver=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --init-path=/usr/libexec/docker/docker-init-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES ExecReload=/bin/kill -s HUP $MAINPID LimitNOFILE=1048576 LimitNPROC=1048576 LimitCORE=infinity TimeoutStartSec=0 Restart=on-abnormal KillMode=process [Install] WantedBy=multi-user.target cat /etc/sysconfig/docker-storage DOCKER_STORAGE_OPTIONS="--storage-driver overlay2 "
尝试执行dockerd 命令,结果运行成功,提示:
dockerd INFO[0000] libcontainerd: new containerd process, pid: 29626 WARN[0000] containerd: low RLIMIT_NOFILE changing to max current=1024 max=4096 INFO[0001] [graphdriver] using prior storage driver: btrfs INFO[0001] Graph migration to content-addressability took 0.00 seconds INFO[0001] Loading containers: start. INFO[0001] Firewalld running: false INFO[0001] Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon option --bip can be used to set a preferred IP address INFO[0001] Loading containers: done. WARN[0001] failed to retrieve docker-runc version: exec: "docker-runc": executable file not found in $PATH WARN[0001] failed to retrieve docker-init version INFO[0001] Daemon has completed initialization INFO[0001] Docker daemon commit="07f3374/1.13.1" graphdriver=btrfs version=1.13.1 INFO[0001] API listen on /var/run/docker.sock
发现了关键字: graphdriver=btrfs 以及之前的报错有提示: error msg="‘overlay2‘ requires kernel 4.7 to use on btrfs"
所以尝试修改 /etc/sysconfig/docker-storage 为:
DOCKER_STORAGE_OPTIONS="--storage-driver btrfs "
重新启动docker:
systemctl start docker
启动成功.问题解决!
下面开始 docker 学习.
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