CentOS 7.7でKubernetes 1.18.0インストール
28509 ワード
システム環境.
ファイアウォールとセキュリティ設定を閉じます.
パスワードなしログインを設定します.各ノードでssh-keygenを実行して公開鍵ペアを生成し、デフォルト値を選択して、車に戻ればいいです.
本ノードの公開鍵をssh-copy-idでk 8 s-masterノードなどの他のノードにコピーするには、公開鍵をk 8 s-node 1、k 8 s-node 2、k 8 s-node 3の3つのノードにコピーする必要があります.他のノードは同様に動作します.
カーネルパラメータを変更します.
Dockerをインストールします.
Kubernetesのyumソースを設定します.
または
kubeadmin、kubectl、kubeletサービスをインストールします.
Kubernetesに必要なミラーバージョン番号を表示します.必要な7つのミラーを事前にダウンロードします.
以上のすべてのコマンドは、k 8 s-master、node 1、node 2、node 3の4つのノードで操作する必要があります.以下の初期化操作は、k 8 s-masterノードでのみ操作する必要があります.
Masterノードを初期化します.
初期化が完了したら、プロンプトに従って次のコマンドを実行する必要があります.最後のjoinコマンドは後で使用されるので、記録する必要があります.
サービスのnodePortデフォルト値範囲を変更します.
Kubernetesステータスを表示します.
flannelネットワークを配備します.
上記のアドレスはアクセスできない場合があります.コードウェアハウスを直接ダウンロードできます.https://github.com/coreos/flannel、flannel-masterを解凍します.zipファイルは、
推奨事項はymlのkube-flannel-ds-arm 64、kube-flannel-ds-arm、kube-flannel-ds-ppc 64 le、kube-flannel-ds-s 390 xの4つのdaemonset削除は、一般的な実験環境がamd 64アーキテクチャであるため、kube-flannel-ds-amd 64のみが保持される.
4つのノードが動作する前にミラーを引き下げることができます.
以上のコマンドはk 8 s-masterノードでのみ実行されます.
Join nodeノードはKubernetesクラスタにあります.k 8 s-node 1、k 8 s-node 2、k 8 s-node 3ノードでそれぞれ次のjoinコマンドを実行し、構成コマンドを実行します.
ノード上でkubectlコマンドを実行するには、次のようにします.
kubernetesステータスを表示します.
終わります.
cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
uname -a
Linux k8s-master 3.10.0-1062.18.1.el7.x86_64 #1 SMP Tue Mar 17 23:49:17 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
vi /etc/hosts
192.168.1.50 k8s-master
192.168.1.51 k8s-node1
192.168.1.52 k8s-node2
192.168.1.53 k8s-node3
ファイアウォールとセキュリティ設定を閉じます.
systemctl stop firewalld
systemctl disable firewalld
vi /etc/fstab
#/dev/mapper/centos-swap swap swap defaults 0 0
vi /etc/selinux/config
SELINUX=disabled
#
reboot
パスワードなしログインを設定します.各ノードでssh-keygenを実行して公開鍵ペアを生成し、デフォルト値を選択して、車に戻ればいいです.
ssh-keygen
本ノードの公開鍵をssh-copy-idでk 8 s-masterノードなどの他のノードにコピーするには、公開鍵をk 8 s-node 1、k 8 s-node 2、k 8 s-node 3の3つのノードにコピーする必要があります.他のノードは同様に動作します.
ssh-copy-id k8s-node1
ssh-copy-id k8s-node2
ssh-copy-id k8s-node3
カーネルパラメータを変更します.
cat < /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
modprobe br_netfilter
sysctl --system
* Applying /usr/lib/sysctl.d/00-system.conf ...
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
* Applying /usr/lib/sysctl.d/10-default-yama-scope.conf ...
kernel.yama.ptrace_scope = 0
* Applying /usr/lib/sysctl.d/50-default.conf ...
kernel.sysrq = 16
kernel.core_uses_pid = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.promote_secondaries = 1
net.ipv4.conf.all.promote_secondaries = 1
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
* Applying /etc/sysctl.d/99-sysctl.conf ...
* Applying /etc/sysctl.d/k8s.conf ...
#
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
* Applying /etc/sysctl.conf ...
Dockerをインストールします.
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
#yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum list docker-ce --showduplicates | sort -r
：fastestmirror
* updates: mirror.bit.edu.cn
Loading mirror speeds from cached hostfile
* extras: mirrors.huaweicloud.com
docker-ce.x86_64 3:19.03.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.8-3.el7 @docker-ce-stable
docker-ce.x86_64 3:19.03.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.5-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.4-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.3-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.2-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.0-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.9-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.5-3.el7 docker-ce-stable
......
yum install -y docker-ce-19.03.8-3.el7
systemctl start docker
systemctl enable docker
docker version
Client: Docker Engine - Community
Version: 19.03.8
API version: 1.40
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:27:04 2020
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.8
API version: 1.40 (minimum version 1.12)
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:25:42 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.2.13
GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683
Kubernetesのyumソースを設定します.
cat < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
または
cat < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=http://packages.cloud.google.com/yum/doc/yum-key.gpg http://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
kubeadmin、kubectl、kubeletサービスをインストールします.
yum list -y kubeadm --showduplicates
：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.bit.edu.cn
* extras: mirrors.huaweicloud.com
* updates: mirror.bit.edu.cn
kubernetes/signature | 454 B 00:00:00
https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
GPG key 0xA7317B0F:
ID : "Google Cloud Packages Automatic Signing Key "
: d0bc 747f d8ca f711 7500 d6fa 3746 c208 a731 7b0f
: https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
kubernetes/signature | 1.4 kB 00:00:00 !!!
kubernetes/primary | 66 kB 00:00:00
kubernetes 481/481
kubeadm.x86_64 1.6.0-0 kubernetes
kubeadm.x86_64 1.6.1-0 kubernetes
kubeadm.x86_64 1.6.2-0 kubernetes
kubeadm.x86_64 1.6.3-0 kubernetes
kubeadm.x86_64 1.6.4-0 kubernetes
kubeadm.x86_64 1.6.5-0 kubernetes
kubeadm.x86_64 1.6.6-0 kubernetes
kubeadm.x86_64 1.6.7-0 kubernetes
kubeadm.x86_64 1.6.8-0 kubernetes
kubeadm.x86_64 1.6.9-0 kubernetes
kubeadm.x86_64 1.6.10-0 kubernetes
kubeadm.x86_64 1.6.11-0 kubernetes
kubeadm.x86_64 1.6.12-0 kubernetes
kubeadm.x86_64 1.6.13-0 kubernetes
......
kubeadm.x86_64 1.12.0-0 kubernetes
kubeadm.x86_64 1.12.1-0 kubernetes
kubeadm.x86_64 1.12.2-0 kubernetes
kubeadm.x86_64 1.12.3-0 kubernetes
kubeadm.x86_64 1.12.4-0 kubernetes
kubeadm.x86_64 1.12.5-0 kubernetes
kubeadm.x86_64 1.12.6-0 kubernetes
kubeadm.x86_64 1.12.7-0 kubernetes
kubeadm.x86_64 1.12.8-0 kubernetes
kubeadm.x86_64 1.12.9-0 kubernetes
kubeadm.x86_64 1.12.10-0 kubernetes
......
kubeadm.x86_64 1.16.0-0 kubernetes
kubeadm.x86_64 1.16.1-0 kubernetes
kubeadm.x86_64 1.16.2-0 kubernetes
kubeadm.x86_64 1.16.3-0 kubernetes
kubeadm.x86_64 1.16.4-0 kubernetes
kubeadm.x86_64 1.16.5-0 kubernetes
kubeadm.x86_64 1.16.6-0 kubernetes
kubeadm.x86_64 1.16.7-0 kubernetes
kubeadm.x86_64 1.16.8-0 kubernetes
kubeadm.x86_64 1.17.0-0 kubernetes
kubeadm.x86_64 1.17.1-0 kubernetes
kubeadm.x86_64 1.17.2-0 kubernetes
kubeadm.x86_64 1.17.3-0 kubernetes
kubeadm.x86_64 1.17.4-0 kubernetes
kubeadm.x86_64 1.18.0-0 kubernetes
yum install -y kubeadm-1.18.0-0 kubectl-1.18.0-0 kubelet-1.18.0-0
kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.0", GitCommit:"9e991415386e4cf155a24b1da15becaa390438d8", GitTreeState:"clean", BuildDate:"2020-03-25T14:56:30Z", GoVersion:"go1.13.8", Compiler:"gc", Platform:"linux/amd64"}
systemctl start kubelet
systemctl enable kubelet
Kubernetesに必要なミラーバージョン番号を表示します.必要な7つのミラーを事前にダウンロードします.
kubeadm config images pull --image-repository=registry.aliyuncs.com/google_containers
W0408 09:53:39.571992 1651 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-apiserver:v1.18.0
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-controller-manager:v1.18.0
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-scheduler:v1.18.0
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-proxy:v1.18.0
[config/images] Pulled registry.aliyuncs.com/google_containers/pause:3.2
[config/images] Pulled registry.aliyuncs.com/google_containers/etcd:3.4.3-0
[config/images] Pulled registry.aliyuncs.com/google_containers/coredns:1.6.7
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
registry.aliyuncs.com/google_containers/kube-proxy v1.18.0 43940c34f24f 13 days ago 117MB
registry.aliyuncs.com/google_containers/kube-apiserver v1.18.0 74060cea7f70 13 days ago 173MB
registry.aliyuncs.com/google_containers/kube-controller-manager v1.18.0 d3e55153f52f 13 days ago 162MB
registry.aliyuncs.com/google_containers/kube-scheduler v1.18.0 a31f78c7c8ce 13 days ago 95.3MB
registry.aliyuncs.com/google_containers/pause 3.2 80d28bedfe5d 7 weeks ago 683kB
registry.aliyuncs.com/google_containers/coredns 1.6.7 67da37a9a360 2 months ago 43.8MB
registry.aliyuncs.com/google_containers/etcd 3.4.3-0 303ce5db0e90 5 months ago 288MB
以上のすべてのコマンドは、k 8 s-master、node 1、node 2、node 3の4つのノードで操作する必要があります.以下の初期化操作は、k 8 s-masterノードでのみ操作する必要があります.
Masterノードを初期化します.
# –-pod-network-cidr： Pod
# –-service-cidr： service ；
# --image-repository: ， 。
kubeadm init --kubernetes-version=v1.18.0 \
--pod-network-cidr=10.244.0.0/16 \
--service-cidr=10.1.0.0/16 \
--image-repository=registry.aliyuncs.com/google_containers
W0408 10:10:19.704855 9534 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.0
[preflight] Running pre-flight checks
[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/
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [k8s-master kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.1.0.1 192.168.1.50]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [k8s-master localhost] and IPs [192.168.1.50 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master localhost] and IPs [192.168.1.50 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
W0408 10:10:29.102901 9534 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
[control-plane] Creating static Pod manifest for "kube-scheduler"
W0408 10:10:29.104505 9534 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 26.007875 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.18" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node k8s-master as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node k8s-master as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: 4oxcgj.1dqz97nbu4pcf84l
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.1.50:6443 --token 4oxcgj.1dqz97nbu4pcf84l \
--discovery-token-ca-cert-hash sha256:2445a08ab9e210e9d3f82949ae16472d47abbc188a2b28e4d6470b02d5ddce3a
初期化が完了したら、プロンプトに従って次のコマンドを実行する必要があります.最後のjoinコマンドは後で使用されるので、記録する必要があります.
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
サービスのnodePortデフォルト値範囲を変更します.
vi /etc/kubernetes/manifests/kube-apiserver.yaml
- --service-node-port-range=1-39999
systemctl daemon-reload
systemctl restart kubelet
Kubernetesステータスを表示します.
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master NotReady master 4m45s v1.18.0
kubectl get all -n kube-system
NAME READY STATUS RESTARTS AGE
pod/coredns-7ff77c879f-8flq5 0/1 Pending 0 5m53s
pod/coredns-7ff77c879f-xth7n 0/1 Pending 0 5m54s
pod/etcd-k8s-master 1/1 Running 0 6m3s
pod/kube-apiserver-k8s-master 1/1 Running 0 19s
pod/kube-controller-manager-k8s-master 1/1 Running 1 6m2s
pod/kube-proxy-fk7tn 1/1 Running 0 5m54s
pod/kube-scheduler-k8s-master 1/1 Running 1 6m2s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kube-dns ClusterIP 10.1.0.10 53/UDP,53/TCP,9153/TCP 6m11s
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/kube-proxy 1 1 1 1 1 kubernetes.io/os=linux 6m11s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coredns 0/2 2 0 6m11s
NAME DESIRED CURRENT READY AGE
replicaset.apps/coredns-7ff77c879f 2 2 0 5m54s
flannelネットワークを配備します.
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
上記のアドレスはアクセスできない場合があります.コードウェアハウスを直接ダウンロードできます.https://github.com/coreos/flannel、flannel-masterを解凍します.zipファイルは、
flannel-master\Documentation\kube-flannel.ymlをk 8 s-masterノードにアップロードします.推奨事項はymlのkube-flannel-ds-arm 64、kube-flannel-ds-arm、kube-flannel-ds-ppc 64 le、kube-flannel-ds-s 390 xの4つのdaemonset削除は、一般的な実験環境がamd 64アーキテクチャであるため、kube-flannel-ds-amd 64のみが保持される.
4つのノードが動作する前にミラーを引き下げることができます.
docker pull quay.io/coreos/flannel:v0.12.0-amd64
kubectl apply -f kube-flannel.yml
podsecuritypolicy.policy/psp.flannel.unprivileged created
clusterrole.rbac.authorization.k8s.io/flannel created
clusterrolebinding.rbac.authorization.k8s.io/flannel created
serviceaccount/flannel created
configmap/kube-flannel-cfg created
daemonset.apps/kube-flannel-ds-amd64 created
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 14m v1.18.0
kubectl get all -n kube-system
NAME READY STATUS RESTARTS AGE
pod/coredns-7ff77c879f-8flq5 1/1 Running 0 23m
pod/coredns-7ff77c879f-xth7n 1/1 Running 0 23m
pod/etcd-k8s-master 1/1 Running 0 24m
pod/kube-apiserver-k8s-master 1/1 Running 0 18m
pod/kube-controller-manager-k8s-master 1/1 Running 1 24m
pod/kube-flannel-ds-amd64-8nft4 1/1 Running 0 13m
pod/kube-proxy-fk7tn 1/1 Running 0 23m
pod/kube-scheduler-k8s-master 1/1 Running 1 24m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kube-dns ClusterIP 10.1.0.10 53/UDP,53/TCP,9153/TCP 24m
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/kube-flannel-ds-amd64 1 1 1 1 1 13m
daemonset.apps/kube-proxy 1 1 1 1 1 kubernetes.io/os=linux 24m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coredns 2/2 2 2 24m
NAME DESIRED CURRENT READY AGE
replicaset.apps/coredns-7ff77c879f 2 2 2 23m
以上のコマンドはk 8 s-masterノードでのみ実行されます.
Join nodeノードはKubernetesクラスタにあります.k 8 s-node 1、k 8 s-node 2、k 8 s-node 3ノードでそれぞれ次のjoinコマンドを実行し、構成コマンドを実行します.
kubeadm join 192.168.1.50:6443 --token 4oxcgj.1dqz97nbu4pcf84l \
--discovery-token-ca-cert-hash sha256:2445a08ab9e210e9d3f82949ae16472d47abbc188a2b28e4d6470b02d5ddce3a
W0408 10:42:33.434915 10437 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignored when control-plane flag is not set.
[preflight] Running pre-flight checks
[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/
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
[kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.18" ConfigMap in the kube-system namespace
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
ノード上でkubectlコマンドを実行するには、次のようにします.
mkdir -p $HOME/.kube
scp 192.168.1.50:/root/.kube/config $HOME/.kube/config
kubernetesステータスを表示します.
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 34m v1.18.0
k8s-node1 Ready 2m47s v1.18.0
k8s-node2 Ready 2m45s v1.18.0
k8s-node3 Ready 2m43s v1.18.0
kubectl get all -n kube-system
NAME READY STATUS RESTARTS AGE
pod/coredns-7ff77c879f-8flq5 1/1 Running 0 35m
pod/coredns-7ff77c879f-xth7n 1/1 Running 0 35m
pod/etcd-k8s-master 1/1 Running 0 35m
pod/kube-apiserver-k8s-master 1/1 Running 0 29m
pod/kube-controller-manager-k8s-master 1/1 Running 1 35m
pod/kube-flannel-ds-amd64-8k5pg 1/1 Running 0 3m41s
pod/kube-flannel-ds-amd64-8nft4 1/1 Running 0 24m
pod/kube-flannel-ds-amd64-w27q7 1/1 Running 0 3m39s
pod/kube-proxy-b6c2q 1/1 Running 0 3m39s
pod/kube-proxy-bvrhx 1/1 Running 0 3m41s
pod/kube-proxy-fk7tn 1/1 Running 0 35m
pod/kube-scheduler-k8s-master 1/1 Running 1 35m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kube-dns ClusterIP 10.1.0.10 53/UDP,53/TCP,9153/TCP 35m
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/kube-flannel-ds-amd64 3 3 3 3 3 24m
daemonset.apps/kube-proxy 3 3 3 3 3 kubernetes.io/os=linux 35m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/coredns 2/2 2 2 35m
NAME DESIRED CURRENT READY AGE
replicaset.apps/coredns-7ff77c879f 2 2 2 35m
終わります.