我正在关注认证 Kubernetes 应用程序开发人员 (CKAD) 认证，在他们的手册中，他们提供了一个 bash 文件来使用 Kubeadm 部署主节点，这是它的内容：
但是当我使用以下命令运行此 bash 文件时：sudo bash deploy.sh我收到一条错误消息，如以下屏幕截图所示：
我尝试使用以下命令启动 docker：sudo systemctl start docker但出现此错误：
Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xe" for details.
然后我运行systemctl status docker.service并得到了这个：
● docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2020-07-21 05:31:17 PDT; 1min 0s ago
Docs: https://docs.docker.com
Process: 10196 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)
Main PID: 10196 (code=exited, status=1/FAILURE)
Jul 21 05:31:15 master systemd[1]: Failed to start Docker Application Container Engine.
Jul 21 05:31:17 master systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Jul 21 05:31:17 master systemd[1]: docker.service: Scheduled restart job, restart counter is at 3.
Jul 21 05:31:17 master systemd[1]: Stopped Docker Application Container Engine.
Jul 21 05:31:17 master systemd[1]: docker.service: Start request repeated too quickly.
Jul 21 05:31:17 master systemd[1]: docker.service: Failed with result 'exit-code'.
Jul 21 05:31:17 master systemd[1]: Failed to start Docker Application Container Engine.
当我跑步时journalctl -xe：
-- Unit kubelet.service has finished starting up.
--
-- The start-up result is RESULT.
Jul 21 05:32:46 master kubelet[10531]: F0721 05:32:46.664769 10531 server.go:199] failed to load Kubelet config file /var/lib/kubelet/config.yaml, error failed to read kubelet config file "/var/lib/kubelet/config.yaml",
Jul 21 05:32:46 master systemd[1]: kubelet.service: Main process exited, code=exited, status=255/n/a
Jul 21 05:32:46 master systemd[1]: kubelet.service: Failed with result 'exit-code'.
Jul 21 05:32:56 master systemd[1]: kubelet.service: Service hold-off time over, scheduling restart.
Jul 21 05:32:56 master systemd[1]: kubelet.service: Scheduled restart job, restart counter is at 189.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit kubelet.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Jul 21 05:32:56 master systemd[1]: Stopped kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished shutting down
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit kubelet.service has finished shutting down.
Jul 21 05:32:56 master systemd[1]: Started kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit kubelet.service has finished starting up.
--
-- The start-up result is RESULT.
Jul 21 05:32:56 master kubelet[10562]: F0721 05:32:56.915762 10562 server.go:199] failed to load Kubelet config file /var/lib/kubelet/config.yaml, error failed to read kubelet config file "/var/lib/kubelet/config.yaml",
Jul 21 05:32:56 master systemd[1]: kubelet.service: Main process exited, code=exited, status=255/n/a
Jul 21 05:32:56 master systemd[1]: kubelet.service: Failed with result 'exit-code'.
Jul 21 05:33:07 master systemd[1]: kubelet.service: Service hold-off time over, scheduling restart.
Jul 21 05:33:07 master systemd[1]: kubelet.service: Scheduled restart job, restart counter is at 190.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit kubelet.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Jul 21 05:33:07 master systemd[1]: Stopped kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished shutting down
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit kubelet.service has finished shutting down.
Jul 21 05:33:07 master systemd[1]: Started kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit kubelet.service has finished starting up.
--
-- The start-up result is RESULT.
Jul 21 05:33:07 master kubelet[10594]: F0721 05:33:07.167571 10594 server.go:199] failed to load Kubelet config file /var/lib/kubelet/config.yaml, error failed to read kubelet config file "/var/lib/kubelet/config.yaml",
Jul 21 05:33:07 master systemd[1]: kubelet.service: Main process exited, code=exited, status=255/n/a
Jul 21 05:33:07 master systemd[1]: kubelet.service: Failed with result 'exit-code'.
＃编辑：
看来我的主机配置很好，当我在开始 CKAD 课程之前运行 bash 文件来检查主机配置时，我得到了这个：
Checking that this computer is suitable for LFD459: Kubernetes for App Developers
--------------------------------------------------------------------------------
PASS: CPU architecture is x86_64
PASS: 4 core CPU
PASS: Your CPU appears powerful enough (currently at 28800 BogoMIPS cumulatively)
PASS: 8 GiB RAM
PASS: 18 GiB free disk space in /home/student
PASS: 18544 MiB free disk space in /boot
PASS: Linux distribution architecture is x86_64
NOTE: Currently running Ubuntu 18.04.4 LTS (supported)
PASS: Internet is available (which is required in this case)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
NOTE: Verifying LFD459_V1.18.1_SOLUTIONS.tar.bz2...
LFD459_V1.18.1_SOLUTIONS.tar.bz2 can be found in /home/student/LFT (matches md5sum)
--------------------------------------------------------------------------------
PASS: You are ready for the course! W00t!
NOTE: Make sure to follow the instructions above to fix any issues found
#编辑2：
这是该命令的输出journalctl -b -l -u docker.service：
Jul 21 23:47:27 master systemd[1]: Starting Docker Application Container Engine...
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.953221050+02:00" level=info msg="Starting up"
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.954590238+02:00" level=info msg="detected 127.0.0.53 nameserver, assuming systemd-resolved, so using resolv.conf: /run/systemd/resolve/resolv.conf"
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.955496259+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.955520337+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.955536944+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.955545650+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.956338328+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.956358305+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.956368715+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.956374109+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.959463090+02:00" level=error msg="failed to mount overlay: no such device" storage-driver=overlay2
Jul 21 23:47:27 master dockerd[52772]: time="2020-07-21T23:47:27.959623339+02:00" level=error msg="[graphdriver] prior storage driver overlay2 failed: driver not supported"
Jul 21 23:47:27 master dockerd[52772]: failed to start daemon: error initializing graphdriver: driver not supported
Jul 21 23:47:27 master systemd[1]: docker.service: Main process exited, code=exited, status=1/FAILURE
Jul 21 23:47:27 master systemd[1]: docker.service: Failed with result 'exit-code'.
Jul 21 23:47:27 master systemd[1]: Failed to start Docker Application Container Engine.
Jul 21 23:47:30 master systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Jul 21 23:47:30 master systemd[1]: docker.service: Scheduled restart job, restart counter is at 1.
Jul 21 23:47:30 master systemd[1]: Stopped Docker Application Container Engine.
Jul 21 23:47:30 master systemd[1]: Starting Docker Application Container Engine...
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.053867227+02:00" level=info msg="Starting up"
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.054769685+02:00" level=info msg="detected 127.0.0.53 nameserver, assuming systemd-resolved, so using resolv.conf: /run/systemd/resolve/resolv.conf"
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.055652016+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.055674606+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.055698288+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.055704678+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.056367593+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.056486920+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.056573578+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.056716563+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.058739295+02:00" level=error msg="failed to mount overlay: no such device" storage-driver=overlay2
Jul 21 23:47:30 master dockerd[52861]: time="2020-07-21T23:47:30.058767565+02:00" level=error msg="[graphdriver] prior storage driver overlay2 failed: driver not supported"
Jul 21 23:47:30 master dockerd[52861]: failed to start daemon: error initializing graphdriver: driver not supported
Jul 21 23:47:30 master systemd[1]: docker.service: Main process exited, code=exited, status=1/FAILURE
Jul 21 23:47:30 master systemd[1]: docker.service: Failed with result 'exit-code'.
Jul 21 23:47:30 master systemd[1]: Failed to start Docker Application Container Engine.
Jul 21 23:47:32 master systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Jul 21 23:47:32 master systemd[1]: docker.service: Scheduled restart job, restart counter is at 2.
Jul 21 23:47:32 master systemd[1]: Stopped Docker Application Container Engine.
Jul 21 23:47:32 master systemd[1]: Starting Docker Application Container Engine...
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.308160161+02:00" level=info msg="Starting up"
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.309457450+02:00" level=info msg="detected 127.0.0.53 nameserver, assuming systemd-resolved, so using resolv.conf: /run/systemd/resolve/resolv.conf"
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.310574227+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.310597573+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.310612962+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.310621281+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.311430901+02:00" level=info msg="parsed scheme: \"unix\"" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.311743318+02:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.311837521+02:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 <nil>}] <nil>}" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.311906843+02:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.313638286+02:00" level=error msg="failed to mount overlay: no such device" storage-driver=overlay2
Jul 21 23:47:32 master dockerd[52943]: time="2020-07-21T23:47:32.313825356+02:00" level=error msg="[graphdriver] prior storage driver overlay2 failed: driver not supported"
Jul 21 23:47:32 master dockerd[52943]: failed to start daemon: error initializing graphdriver: driver not supported
Jul 21 23:47:32 master systemd[1]: docker.service: Main process exited, code=exited, status=1/FAILURE
命令 hostnamectl 的输出
Static hostname: minion
Icon name: computer-vm
Chassis: vm
Machine ID: 27887afb286041e0be11b5c369d4ae19
Boot ID: 73f2db8c0a7d4abc9e079918251e2b77
Virtualization: vmware
Operating System: Ubuntu 18.04.5 LTS
Kernel: Linux 5.7.0
Architecture: x86-64