kubeadm部署报错

 

WARNING Swap

报错信息

[WARNING Swap]: swap is enabled; production deployments should disable swap unless testing the NodeSwap feature gate of the kubelet

解决方案

执行如下命令，关闭swap

swapoff -a

container runtime is not running

报错信息

error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR CRI]: container runtime is not running: output: time="2022-05-04T16:22:53+08:00" level=fatal msg="getting status of runtime: rpc error: code = Unimplemented desc = unknown service runtime.v1alpha2.RuntimeService"

排查步骤

ps aux | grep docker | grep -v grep

root      1110  0.0  1.5 1036724 60084 ?       Ssl  16:15   0:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

 

cat /etc/containerd/config.toml

#   Copyright 2018-2022 Docker Inc.

#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at

#       http://www.apache.org/licenses/LICENSE-2.0

#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

disabled_plugins = ["cri"]

#root = "/var/lib/containerd"
#state = "/run/containerd"
#subreaper = true
#oom_score = 0

#[grpc]
#  address = "/run/containerd/containerd.sock"
#  uid = 0
#  gid = 0

#[debug]
#  address = "/run/containerd/debug.sock"
#  uid = 0
#  gid = 0
#  level = "info"

原因分析

containerd进程禁用了cri模块插件

解决方案

rm -fr /etc/containerd/config.toml

systemctl restart containerd

systemctl status containerd.service

● containerd.service - containerd container runtime
   Loaded: loaded (/usr/lib/systemd/system/containerd.service; disabled; vendor preset: disabled)
   Active: active (running) since Wed 2022-05-04 16:31:35 CST; 1min 43s ago
     Docs: https://containerd.io
  Process: 2132 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
 Main PID: 2134 (containerd)
    Tasks: 11
   Memory: 31.5M
   CGroup: /system.slice/containerd.service
           └─2134 /usr/bin/containerd

May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.854547360+08:00" level=info msg=...c.v1
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.854744640+08:00" level=info msg=...trpc
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.854770148+08:00" level=info msg=...sock
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.854808350+08:00" level=info msg=...91s"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.856026731+08:00" level=info msg=...ent"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.856093747+08:00" level=info msg=...ate"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.856167505+08:00" level=info msg=...tor"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.857523064+08:00" level=info msg=...cer"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.857677043+08:00" level=info msg=...cer"
May 04 16:31:35 master containerd[2134]: time="2022-05-04T16:31:35.858021033+08:00" level=info msg=...ver"
Hint: Some lines were ellipsized, use -l to show in full.

cat /usr/lib/systemd/system/containerd.service

[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd

Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
# 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
LimitNOFILE=infinity
# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target