{"id":4234,"date":"2020-03-23T22:42:47","date_gmt":"2020-03-23T13:42:47","guid":{"rendered":"https:\/\/higherhope.net\/?p=4234"},"modified":"2024-04-11T22:06:44","modified_gmt":"2024-04-11T13:06:44","slug":"centos-8%e3%81%a7kubernetes-cluster%e3%82%92%e6%a7%8b%e7%af%89%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f_2","status":"publish","type":"post","link":"https:\/\/higherhope.net\/?p=4234","title":{"rendered":"CentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_2"},"content":{"rendered":"

\u524d\u56deCentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_1<\/a>\u3067master node\u306e\u69cb\u7bc9\u304c\u7d42\u308f\u3063\u305f\u306e\u3067\u3001Worker Node\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/p>\n

selinux\u30fbfirewalld\u30fbswap\u306f\u7121\u52b9\u30fbhosts\u306b\u8ffd\u8a18\u30fbdocker\u30fbkubeadm \u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u6240\u307e\u3067\u306fmaster\u30b5\u30fc\u30d0\u30fc\u3068\u540c\u69d8\u3067\u3059\u3002
\n\u81ea\u5206\u306fKVM\u306eclone\u3067node\u7528\u306e\u30b5\u30fc\u30d0\u30fc\u30922\u53f0\u69cb\u7bc9\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u524d\u56demaster\u30b5\u30fc\u30d0\u30fc\u3067kubeadm init\u3092\u5b9f\u884c\u3057\u3066\u8868\u793a\u3055\u308c\u305fkubeadm join\uff5e\u306e\u7d50\u679c\u3092\u30b3\u30d4\u30da\u3057\u307e\u3059\u3002<\/p>\n

# kubeadm join 192.168.5.101:6443 –token vb94zf.j2un0ry3aunvx9y3 –discovery-token-ca-cert-hash sha256:f42734223e79931159a470fe37a27677c51bcca051feccefbb8a050fbbfcad43
\nW0318 23:57:21.802582 1546 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignored when control-plane flag is not set.
\n[preflight] Running pre-flight checks
\n [WARNING IsDockerSystemdCheck]: detected “cgroupfs” as the Docker cgroup driver. The recommended driver is “systemd”. Please follow the guide at https:\/\/kubernetes.io\/docs\/setup\/cri\/
\n [WARNING FileExisting-tc]: tc not found in system path<\/p>\n

error execution phase preflight: couldn’t validate the identity of the API Server: abort connecting to API servers after timeout of 5m0s
\nTo see the stack trace of this error execute with –v=5 or higher<\/p><\/blockquote>\n

\u30b3\u30b1\u307e\u3057\u305f\u3002\u3002<\/p>\n

node\u304b\u3089master\u3078\u306eping\u306e\u758e\u901a\u306f\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002
\nmaster\u3067token\u3092\u518d\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n

[root@master ~]# kubeadm token list<\/p><\/blockquote>\n

\u4f55\u3082\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002
\ntoken\u3092\u518d\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n

[root@master ~]# kubeadm token create –ttl 0
\nW0319 00:23:48.794101 21520 validation.go:28] Cannot validate kube-proxy config – no validator is available
\nW0319 00:23:48.794139 21520 validation.go:28] Cannot validate kubelet config – no validator is available
\n77m1r6.thccq5p3w9a0513z
\n[root@master ~]# kubeadm token list
\nTOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS
\n77m1r6.thccq5p3w9a0513z authentication,signing system:bootstrappers:kubeadm:default-node-token<\/p><\/blockquote>\n

\u51fa\u6765\u305f\u3088\u3046\u306a\u306e\u3067\u518d\u5ea6node\u30b5\u30fc\u30d0\u30fc\u3067join\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n

# kubeadm join 192.168.5.101:6443 –token 77m1r6.thccq5p3w9a0513z –discovery-token-ca-cert-hash sha256:f42734223e79931159a470fe37a27677c51bcca051feccefbb8a050fbbfcad43
\nW0319 21:59:35.792352 1067 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignored when control-plane flag is not set.
\n[preflight] Running pre-flight checks
\n [WARNING IsDockerSystemdCheck]: detected “cgroupfs” as the Docker cgroup driver. The recommended driver is “systemd”. Please follow the guide at https:\/\/kubernetes.io\/docs\/setup\/cri\/
\n [WARNING FileExisting-tc]: tc not found in system path
\n[preflight] Reading configuration from the cluster…
\n[preflight] FYI: You can look at this config file with ‘kubectl -n kube-system get cm kubeadm-config -oyaml’
\n[kubelet-start] Downloading configuration for the kubelet from the “kubelet-config-1.17” ConfigMap in the kube-system namespace
\n[kubelet-start] Writing kubelet configuration to file “\/var\/lib\/kubelet\/config.yaml”
\n[kubelet-start] Writing kubelet environment file with flags to file “\/var\/lib\/kubelet\/kubeadm-flags.env”
\n[kubelet-start] Starting the kubelet
\n[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap…<\/p>\n

This node has joined the cluster:
\n* Certificate signing request was sent to apiserver and a response was received.
\n* The Kubelet was informed of the new secure connection details.<\/p>\n

Run ‘kubectl get nodes’ on the control-plane to see this node join the cluster.<\/p><\/blockquote>\n

\u3046\u307e\u304f\u884c\u3063\u305f\u3088\u3046\u306a\u306e\u3067master\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n

[root@master ~]# kubectl get nodes
\nNAME STATUS ROLES AGE VERSION
\nmaster.hoge.net Ready master 2d22h v1.17.4
\nnode-01.hoge.net Ready 21h v1.17.4<\/p><\/blockquote>\n

\u7121\u4e8b\u306bnode\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u540c\u69d8\u306b\u3082\u3046\u4e00\u53f0node\u7528\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3057join\u3092\u3057\u307e\u3059\u3002<\/p>\n

[root@master ~]# kubectl get nodes
\nNAME STATUS ROLES AGE VERSION
\nmaster.hoge.net Ready master 6d22h v1.17.4
\nnode-01.hoge.net Ready 4d21h v1.17.4
\nnode-02.hoge.net Ready 4d v1.17.4<\/p><\/blockquote>\n

\u3053\u308c\u3067\u3001master1\u53f0node2\u53f0\u306eKubernetes Cluster\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u524d\u56deCentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_1\u3067master node\u306e\u69cb\u7bc9\u304c\u7d42\u308f\u3063\u305f\u306e\u3067\u3001Worker Node\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002 selinux\u30fbfirewalld\u30fbswap\u306f\u7121\u52b9\u30fb… Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182,4],"tags":[183],"class_list":["post-4234","post","type-post","status-publish","format-standard","hentry","category-kubernetes","category-linux","tag-kubernetes"],"yoast_head":"\nCentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_2 - \u697d\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/higherhope.net\/?p=4234\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_2 - \u697d\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta property=\"og:description\" content=\"\u524d\u56deCentOS 8\u3067Kubernetes Cluster\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f_1\u3067master node\u306e\u69cb\u7bc9\u304c\u7d42\u308f\u3063\u305f\u306e\u3067\u3001Worker Node\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002 selinux\u30fbfirewalld\u30fbswap\u306f\u7121\u52b9\u30fb... 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