Ubuntu18安装部署Kubernetes并完成Nginx-deployment的安装、升级、扩容、删除操作demo
Ubuntu18安装部署Kubernetes并完成Nginx-deployment的安装、升级、扩容、删除操作demo【采用docker方式进行】【1】在虚拟机安装kuberctl1.下载最新版：curl -LO "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleap
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Ubuntu18安装部署Kubernetes并完成Nginx-deployment的安装、升级、扩容、删除操作demo
【采用docker方式进行】
【1】在虚拟机安装kuberctl
1.下载最新版：curl -LO "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl"
要下载最新版，请用特定版本替换$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)命令部分。
2.使下载的这个kubectl获得二进制可执行权限：chmod +x ./kubectl
3. 将二进制文件移到PATH中：sudo mv ./kubectl /usr/local/bin/kubectl
4.测试以确保您安装的是最新版：kubectl version --client
我的显示：Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:58:53Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
【2】查看OS类型是否为linux，可以使用docker命令：docker info --format ‘{{.OSType}}’ 可以看到是linux
【3】在网上下载minikube：
https://github.com/kubernetes/minikube/releases/download/v1.10.1/minikube_latest_amd64.deb
然后在这个文件目录下执行：sudo dpkg -i minikube_latest_amd64.deb
1.要是它警告说：Warning: /**/bin was not found in your $PATH.。。。意味着你需要将这个路径加入到你的$PATH中去
可以使用echo $PATH查看一下，没有就使用export PATH=$PATH:/**/bin 加入$PATH
【4】提前下载镜像：docker pull anjone/kicbase
【5】启动
sudo minikube start --registry-mirror=https://bmtb46e4.mirror.aliyuncs.com --vm-driver=docker --base-image=“anjone/kicbase” --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
1.如果出现Sorry, Kubernetes v1.18.0 requires conntrack to be installed in root's path
请执行：sudo apt install conntrack然后再启动一下即可
执行终端日志输出：
root@deployment:/home/ljo/kubernetes# minikube start --registry-mirror=https://bmtb46e4.mirror.aliyuncs.com --driver=none --base-image=“anjone/kicbase” --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
😄 minikube v1.10.1 on Ubuntu 18.04
✨ Using the none driver based on existing profile
👍 Starting control plane node minikube in cluster minikube
🏃 Updating the running none "minikube" bare metal machine ...
ℹ️ OS release is Ubuntu 18.04.3 LTS
🐳 Preparing Kubernetes v1.18.2 on Docker 19.03.5 ...
▪ kubelet.resolv-conf=/run/systemd/resolve/resolv.conf
🤹 Configuring local host environment ...
❗ The 'none' driver is designed for experts who need to integrate with an existing VM
💡 Most users should use the newer 'docker' driver instead, which does not require root!
📘 For more information, see: https://minikube.sigs.k8s.io/docs/reference/drivers/none/
❗ kubectl and minikube configuration will be stored in /root
❗ To use kubectl or minikube commands as your own user, you may need to relocate them. For example, to overwrite your own settings, run:
▪ sudo mv /root/.kube /root/.minikube $HOME
▪ sudo chown -R $USER $HOME/.kube $HOME/.minikube
💡 This can also be done automatically by setting the env var CHANGE_MINIKUBE_NONE_USER=true
🌟 Enabled addons: default-storageclass, storage-provisioner
🏄 Done! kubectl is now configured to use "minikube"
root@deployment:/home/ljo/kubernetes#
【这中间可能会等一段时间，它在后台下载东西，不要以为是卡住了】
【6】查看状态：minikube status
root@deployment:/home/ljo# minikube status
minikube
type: Control Plane
host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured
【没有启动的话就是下面这个】
root@deployment:/home/ljo# minikube status
minikube
type: Control Plane
host: Stopped
kubelet: Stopped
apiserver: Stopped
kubeconfig: Stopped
【7】查看当前配置 ： kubectl config current-context
显示：minikube
【8】查看集群状态：kubectl cluster-info
root@deployment:/home/ljo# kubectl cluster-info
Kubernetes master is running at https://10.112.26.131:8443
KubeDNS is running at https://10.112.26.131:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
【9】查看节点：kubectl get no
root@deployment:/home/ljo# kubectl get no
NAME STATUS ROLES AGE VERSION
deployment Ready master 8m55s v1.18.2
【10】打开dashboard：minikube dashboard
我这里总是启动这个失败，有点烦。
root@deployment:/home/ljo# minikube dashboard
🔌 Enabling dashboard …
🤔 Verifying dashboard health …
🚀 Launching proxy …
🤔 Verifying proxy health …
💣 http://127.0.0.1:37527/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/ is not accessible: Temporary Error: unexpected response code: 503
通过该命令查看：kubectl get pods --all-namespaces -o wide，发现我的kubernetes-dashboard-xxx有点不正常。
root@deployment:/home/ljo# kubectl get pods --all-namespaces -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system coredns-546565776c-gwzht 0/1 Running 0 22m 172.17.0.3 deployment <none> <none>
kube-system coredns-546565776c-nstdz 0/1 Running 0 22m 172.17.0.2 deployment <none> <none>
kube-system etcd-deployment 1/1 Running 0 23m 10.112.26.131 deployment <none> <none>
kube-system kube-apiserver-deployment 1/1 Running 0 23m 10.112.26.131 deployment <none> <none>
kube-system kube-controller-manager-deployment 1/1 Running 0 23m 10.112.26.131 deployment <none> <none>
kube-system kube-proxy-zbvtr 1/1 Running 0 22m 10.112.26.131 deployment <none> <none>
kube-system kube-scheduler-deployment 1/1 Running 0 23m 10.112.26.131 deployment <none> <none>
kube-system storage-provisioner 1/1 Running 0 22m 10.112.26.131 deployment <none> <none>
kubernetes-dashboard dashboard-metrics-scraper-84bfdf55ff-4rzb6 1/1 Running 0 13m 172.17.0.4 deployment <none> <none>
kubernetes-dashboard kubernetes-dashboard-696dbcc666-94q2p 0/1 CrashLoopBackOff 6 13m 172.17.0.5 deployment <none> <none>
root@deployment:/home/ljo# kubectl get services --all-namespaces
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 25m
kube-system kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 25m
kubernetes-dashboard dashboard-metrics-scraper ClusterIP 10.100.36.203 <none> 8000/TCP 15m
kubernetes-dashboard kubernetes-dashboard ClusterIP 10.111.135.14 <none> 80/TCP 15m
不管这个了，看下一个，直接玩起来。
如果要在本地访问dashboard，我们需要创建一个安全通道，可运行如下命令
root@deployment:/home/ljo/kubernetes# kubectl proxy
Starting to serve on 127.0.0.1:8001
【11】提交一个 nginx deployment；
kubectl apply -f https://k8s.io/examples/application/deployment.yaml
root@deployment:/home/ljo# kubectl apply -f https://k8s.io/examples/application/deployment.yaml
deployment.apps/nginx-deployment created
root@deployment:/home/ljo# kubectl get deployment
NAME READY UP-TO-DATE AVAILABLE AGE
nginx-deployment 1/2 2 1 90s
root@deployment:/home/ljo# kubectl describe deployment nging-deployment
Error from server (NotFound): deployments.apps "nging-deployment" not found
root@deployment:/home/ljo# kubectl describe deployment nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Wed, 29 Jul 2020 05:57:46 +0000
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 1
Selector: app=nginx
Replicas: 2 desired | 2 updated | 2 total | 2 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.14.2
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-6b474476c4 (2/2 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 2m55s deployment-controller Scaled up replica set nginx-deployment-6b474476c4 to 2
【12】升级 nginx deployment；
kubectl apply -f https://k8s.io/examples/application/deployment-update.yaml
root@deployment:/home/ljo# kubectl apply -f https://k8s.io/examples/application/deployment-update.yaml
deployment.apps/nginx-deployment configured
root@deployment:/home/ljo# kubectl describe deployment nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Wed, 29 Jul 2020 05:57:46 +0000
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 2
Selector: app=nginx
Replicas: 2 desired | 1 updated | 3 total | 2 available | 1 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.16.1
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True ReplicaSetUpdated
OldReplicaSets: nginx-deployment-6b474476c4 (2/2 replicas created)
NewReplicaSet: nginx-deployment-7b45d69949 (1/1 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 4m9s deployment-controller Scaled up replica set nginx-deployment-6b474476c4 to 2
Normal ScalingReplicaSet 13s deployment-controller Scaled up replica set nginx-deployment-7b45d69949 to 1
【13】扩容 nginx deployment。
kubectl apply -f https://k8s.io/examples/application/deployment-scale.yaml
root@deployment:/home/ljo# kubectl apply -f https://k8s.io/examples/application/deployment-scale.yaml
deployment.apps/nginx-deployment configured
root@deployment:/home/ljo# kubectl describe deployment nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Wed, 29 Jul 2020 05:57:46 +0000
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 3
Selector: app=nginx
Replicas: 4 desired | 2 updated | 5 total | 2 available | 3 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.14.2
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available False MinimumReplicasUnavailable
Progressing True ReplicaSetUpdated
OldReplicaSets: nginx-deployment-7b45d69949 (3/3 replicas created)
NewReplicaSet: nginx-deployment-6b474476c4 (2/2 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 2m30s deployment-controller Scaled up replica set nginx-deployment-7b45d69949 to 1
Normal ScalingReplicaSet 41s deployment-controller Scaled down replica set nginx-deployment-6b474476c4 to 1
Normal ScalingReplicaSet 41s deployment-controller Scaled up replica set nginx-deployment-7b45d69949 to 2
Normal ScalingReplicaSet 38s deployment-controller Scaled down replica set nginx-deployment-6b474476c4 to 0
Normal ScalingReplicaSet 12s deployment-controller Scaled up replica set nginx-deployment-7b45d69949 to 4
Normal ScalingReplicaSet 11s (x2 over 6m26s) deployment-controller Scaled up replica set nginx-deployment-6b474476c4 to 2
Normal ScalingReplicaSet 11s deployment-controller Scaled up replica set nginx-deployment-6b474476c4 to 1
Normal ScalingReplicaSet 11s deployment-controller Scaled down replica set nginx-deployment-7b45d69949 to 3
【14】删除deployment
root@deployment:/home/ljo# kubectl delete deployment nginx-deployment
deployment.apps "nginx-deployment" deleted
root@deployment:/home/ljo# kubectl get deployment
No resources found in default namespace.
root@deployment:/home/ljo#
【15】停止运行的minikube（minikube）
root@deployment:/home/ljo# minikube stop
✋ Stopping "minikube" in none ...
🛑 Node "minikube" stopped.
【16】删除本地的minikube集群
root@deployment:/home/ljo# minikube delete
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