Docker修改daemon.json后無法啟動的問題

運行環境如下：CentOS 7.9，docker是通過yum在線安裝的
在處理docker時，遇見了一個問題：

docker swarm init --advertise-addr [本地ip]

執行之后，出現一個錯誤提示

根據網上的解決方案，可以在/etc/docker/daemon.json配置live-restore為false解決，如下所示

{"live-restore": false }

但是在重啟docker時，出現報錯：

查看docker狀態，提示以下指令與任何配置選項都不匹配：

為了解決這個問題，換了一個思路：
查看vim /usr/lib/systemd/system/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

可以看到啟動的時候會從 /etc/sysconfig/docker 中獲取環境變量。
繼續查看/etc/sysconfig/docker，可以在參數中添加–live-restore=false實現

# /etc/sysconfig/docker# Modify these options if you want to change the way the docker daemon runs OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false --live-restore=false' if [ -z "${DOCKER_CERT_PATH}" ]; thenDOCKER_CERT_PATH=/etc/docker fi# Do not add registries in this file anymore. Use /etc/containers/registries.conf # instead. For more information reference the registries.conf(5) man page.# Location used for temporary files, such as those created by # docker load and build operations. Default is /var/lib/docker/tmp # Can be overriden by setting the following environment variable. # DOCKER_TMPDIR=/var/tmp# Controls the /etc/cron.daily/docker-logrotate cron job status. # To disable, uncomment the line below. # LOGROTATE=false# docker-latest daemon can be used by starting the docker-latest unitfile. # To use docker-latest client, uncomment below lines #DOCKERBINARY=/usr/bin/docker-latest #DOCKERDBINARY=/usr/bin/dockerd-latest #DOCKER_CONTAINERD_BINARY=/usr/bin/docker-containerd-latest #DOCKER_CONTAINERD_SHIM_BINARY=/usr/bin/docker-containerd-shim-latest

最終docker可以正常啟動

總結

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