# 今日來介紹 Pod 靜態文件～ Manifest ### 認識 Manifest 檔案 此文件用來定義 Pod，以文字宣告方式表達出 Pod 所有的面貌，該文件以 YAML or JSON 兩格式其一來呈現。 可以來透過現有 Pod 來取得該資源 manifest file。 \ 指令如下： ```bash [user@minikube ~]$ kubectl get pod NAME READY STATUS RESTARTS AGE hello-minikube-7c77b68cff-ncqmn 1/1 Running 1 4d [user@minikube ~]$ kubectl get pod hello-minikube-7c77b68cff-ncqmn -o yaml # 內容很多，以下面圖片替代～ ```
### manifest 檔案說明 * `apiVersion:` \ * `kind:` <資源名稱> * `metadata:` <物件名稱> * `spec:` < containers 面貌> * `status:`<運作狀態> ### 用 Manifest 部署，範例 **部署 pod 也可以透過 manifest 檔案進行** 舉下面例子建立複製版 hello-minikube，稱呼為 hello-kitty**，**先建立 kk8s/hello-kitty.yaml file ```yaml apiVersion: v1 kind: Pod metadata: labels: run: hello-minikube name: hello-kitty namespace: default spec: containers: - image: k8s.gcr.io/echoserver:1.10 name: hello-kitty ports: - containerPort: 8081 protocol: TCP ``` #### 透過 kubectl apply 指令進行 hello-kitty 部署 ```bash [user@minikube ~]$ kubectl apply -f kk8s/hello-kitty.yaml pod/hello-kitty created [user@minikube ~]$ kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE hello-kitty 1/1 Running 0 14s 172.17.0.6 minikube hello-minikube-7c77b68cff-ncqmn 1/1 Running 1 5d 172.17.0.4 minikube ``` #### 透過 manifest 檔案建立 deployment 物件 透過 manifest 檔案部署 hello-moto deployments 物件，先建立 kk8s/hello-moto-deployment.yaml 檔案 ```yaml apiVersion: extensions/v1beta1 kind: Deployment metadata: annotations: deployment.kubernetes.io/revision: "1" labels: run: hello-moto name: hello-moto namespace: default spec: replicas: 1 selector: matchLabels: run: hello-moto strategy: rollingUpdate: maxSurge: 25% maxUnavailable: 25% type: RollingUpdate template: metadata: labels: run: hello-moto spec: containers: - image: k8s.gcr.io/echoserver:1.10 name: hello-moto ports: - containerPort: 8080 protocol: TCP dnsPolicy: ClusterFirst restartPolicy: Always ``` #### 透過 kubectl apply 指令進行 hello-moto deployments 部署 ```bash [user@minikube ~]$ kubectl apply -f kk8s/hello-moto-deployment.yaml deployment.extensions/hello-moto created [user@minikube ~]$ kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE hello-kitty 1/1 Running 0 10m 172.17.0.6 minikube hello-minikube-7c77b68cff-ncqmn 1/1 Running 1 5d 172.17.0.4 minikube hello-moto-6456dff9f-67jh5 1/1 Running 0 6s 172.17.0.7 minikube [user@minikube ~]$ kubectl get deployments -o wide NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR hello-minikube 1 1 1 1 5d hello-minikube k8s.gcr.io/echoserver:1.10 run=hello-minikube hello-moto 1 1 1 1 27s hello-moto k8s.gcr.io/echoserver:1.10 run=hello-moto [user@minikube ~]$ ``` 有沒有發現，deployment 物件只出現 hello-moto，卻沒有 hello-kitty ～\ 因為，在建立 hello-moto depolyment 物件時，manifest 檔案中有宣告 pod 物件。\ 意即，建立 hello-moto depolyment 物件時同時也建立相對應的 pod 物件。 #### 接著進行 “hello-moto” service 部署 ```bash [user@minikube ~]$ kubectl expose deployment hello-moto --type=NodePort service/hello-moto exposed [user@minikube ~]$ kubectl get services -o wide NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR hello-minikube NodePort 10.97.219.147 8080:31472/TCP 5d run=hello-minikube hello-moto NodePort 10.101.39.213 8080:32049/TCP 17s run=hello-moto kubernetes ClusterIP 10.96.0.1 443/TCP 6d ``` #### 驗證 hello-kitty 是否有回應 ```bash [user@minikube ~]$ curl $(minikube service hello-moto --url) Hostname: hello-moto-6456dff9f-67jh5 Pod Information: -no pod information available- Server values: server_version=nginx: 1.13.3 - lua: 10008 Request Information: client_address=172.17.0.1 method=GET real path=/ query= request_version=1.1 request_scheme=http request_uri=http://192.168.99.100:8080/ Request Headers: accept=*/* host=192.168.99.100:32049 user-agent=curl/7.47.0 Request Body: -no body in request- [user@minikube ~]$ ``` #### 以上，簡單的示範如何透過 manifest 檔案建立物件與服務，藉此認識 manifest ! {% hint style="warning" %} ***謎之音***：pod 建立完之後，怎麼建立相對應的 deployment 物件呢？ {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://fufu.gitbook.io/kk8s/manifest-info.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.