🥛 🧔🏼 ➗ Kubernetes 1.18打破了“ kubectl运行”。替换什么？ 👏🏻 🕠 🔚

如果您使用过Kubernetes的早期版本（相同的1.16），则可能会看到来自的奇怪警告kubectl run。

直到最近，该命令仍可以从命令行生成用于部署或YAML的对象。从Kubernetes 1.18开始，此功能已以非常令人惊讶的方式被破坏。本文将回答问题“为什么？” 和“如何进一步处理？”

在深入探讨这些问题之前，请记住，有三种主要方法可以创建要在Kubernetes中部署的对象：

通过API（例如OpenFaaS）
通过手动创建YAML文件。或更接近现实-从不同站点（您好，StackOverflow）的某个位置复制粘贴到其中
通过启动kubectl run或kubectl run -o yaml --dry-run

如您所见，我还按复杂性顺序列出了这些选项（从困难到简单）。

比较选项

, API — , . API «extensions/v1beta», «apps/v1», YAML. , — Go YAML. Go IDE, , . Core? Meta? Apps? Extensions? , — Intellisense?

OpenFaaS Kubernetes (aka faas-netes)

— YAML . Twitter #kubernetes, , , , Kubernetes, , YAML.

, , , - , . , API Kubernetes.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-1
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Kubernetes, . , .

Kubernetes YAML , (, , . ).

;
;
YAML ;
CI\CD.

, , , :

$ kubectl run nginx-1 --image=nginx --port=80 --restart=Always

, — YAML , . , ?

$ kubectl run nginx-1 --image=nginx:1.14.2 --port=80 \
    --restart=Always -o yaml --dry-run
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    run: nginx-1
  name: nginx-1
spec:
  replicas: 1
  selector:
    matchLabels:
      run: nginx-1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        run: nginx-1
    spec:
      containers:
      - image: nginx:1.14.2
        name: nginx-1
        ports:
        - containerPort: 80
        resources: {}

, --replicas --serviceaccount. .

— , , Kubernetes 1.18 .

, , .

, : «, , »

$ kubectl run nginx-1 --image=nginx --port=80 --restart=Always
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/nginx-1 created

kubectl 1.17 ( 1.15 ), YAML. Kubernetes 1.18 :

kubectl run nginx-1 --image=nginx --port=80 --restart=Always -o yaml --dry-run
W0512 14:27:13.111424   30104 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: nginx-1
  name: nginx-1
spec:
  containers:
  - image: nginx
    name: nginx-1
    ports:
    - containerPort: 80
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always

Pod — Deployment. service account , , , , , ( ) ip-. Deployments Services .

, curl api, Kafka.

inlets-operator, , .

helm chart, , . Deployment, LoadBalancer, VM , , ip-.

kubectl run nginx-1 --image=nginx --port=80 --restart=Always
kubectl expose deployment nginx-1 --port=80 --type=LoadBalancer

export DEPLOYMENT=nginx-1
(cat<<EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: $DEPLOYMENT
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
EOF
) | kubectl apply -f -
kubectl expose deployment nginx-1 --port=80 --type=LoadBalancer

Kubernetes, kubectl expose ;-)

, Deployment. , , :

$ kubectl apply -f https://raw.githubusercontent.com/inlets/inlets-operator/master/contrib/nginx-sample-deployment.yaml

, kubectl apply -f .

?

, . , kubectl create deployment.

, , --port, --serviceaccount, --replicas --restart-policy.

kubectl create deployment --help
Create a deployment with the specified name.
Aliases:
deployment, deploy
Examples:
  # Create a new deployment named my-dep that runs the busybox image.
  kubectl create deployment my-dep --image=busybox
Options:
      --allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in
the template. Only applies to golang and jsonpath output formats.
      --dry-run='none': Must be "none", "server", or "client". If client strategy, only print the object that would be
sent, without sending it. If server strategy, submit server-side request without persisting the resource.
      --image=[]: Image name to run.
  -o, --output='': Output format. One of:
json|yaml|name|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-file.
      --save-config=false: If true, the configuration of current object will be saved in its annotation. Otherwise, the
annotation will be unchanged. This flag is useful when you want to perform kubectl apply on this object in the future.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The
template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
      --validate=true: If true, use a schema to validate the input before sending it
Usage:
  kubectl create deployment NAME --image=image [--dry-run=server|client|none] [options]
Use "kubectl options" for a list of global command-line options (applies to all commands).

kubectl create, , YAML. — bash, .

— StackOverflow Kubernetes Deployment. ? YAML .

$ kubectl create deployment nginx-1 --image=nginx  -o yaml --dry-run
W0512 14:38:18.296270   30135 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: nginx-1
  name: nginx-1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx-1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: nginx-1
    spec:
      containers:
      - image: nginx
        name: nginx
        resources: {}

, , restartPolicy .

?

, , , , .

Pull request 68132 , kubectl run docker run. .

, Kubernetes kubectl create deployment, , , : « — PR».

? Twitter, , .

- , , , Kubernetes, «». «».

1.18.

— , (Kubernetes, DevOps, Docker, Ansible, Ceph, SRE)

Kubernetes 1.18打破了“ kubectl运行”。替换什么？

比较选项

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