Merge pull request #7 from Otus-DevOps-2023-05/kubernetes-2

Kubernetes 2

README.md

@@ -377,3 +377,74 @@ docker-machine rm -f $(docker-machine ls -q)
 yc compute instance delete k8s-worker-node
 yc compute instance delete k8s-master-node
 ```
+
+## Kubernetes-2
+### Что было сделано:
+1. Установил minikube и kubectl
+```shell
+[22:30:17] baykanurov:baykanurov_microservices git:(kubernetes-2) $ minikube version
+minikube version: v1.31.2
+commit: fd7ecd9c4599bef9f04c0986c4a0187f98a4396e
+[22:32:21] baykanurov:baykanurov_microservices git:(kubernetes-2) $ kubectl version
+Client Version: v1.28.3
+Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
+Server Version: v1.27.4
+```
+2. Развернул кластер с помощью minikube на драйвере docker
+```shell
+minikube start --driver=docker
+```
+3. Написал deployment и services для приложения reddit
+```shell
+kubectl apply -f kubernetes/reddit/
+```
+4. Получил доступ к сервису ui
+```shell
+minikube service ui
+```
+5. Развернул аддон для kubernetes dashboard
+```shell
+minikube addons enable dashboard
+minikube dashboard --url 0.0.0.0
+```
+6. Развернул кластер kubernetes-2-baykanurov через Yandex Cloud
+Managed Service for kubernetes
+7. Создал группы узлов для данного кластера
+8. Подключился к кластеру
+```shell
+22:50:23] baykanurov:baykanurov_microservices git:(kubernetes-2) $ yc managed-kubernetes cluster get-credentials kubernetes-2-baykanurov --external
+
+Context 'yc-kubernetes-2-baykanurov' was added as default to kubeconfig '/home/baykanurov/.kube/config'.
+Check connection to cluster using 'kubectl cluster-info --kubeconfig /home/baykanurov/.kube/config'.
+
+Note, that authentication depends on 'yc' and its config profile 'default'.
+To access clusters using the Kubernetes API, please use Kubernetes Service Account.
+There is a new yc version '0.113.0' available. Current version: '0.111.0'.
+See release notes at https://cloud.yandex.ru/docs/cli/release-notes
+You can install it by running the following command in your shell:
+        $ yc components update
+[22:50:32] baykanurov:baykanurov_microservices git:(kubernetes-2) $ kubectl config current-context
+yc-kubernetes-2-baykanurov
+```
+9. Нашёл внешний IP-адрес развернутых нод и порт публикации сервиса UI
+```shell
+[23:48:07] baykanurov:baykanurov_microservices git:(kubernetes-2) $ kubectl get nodes -o wide
+NAME                        STATUS   ROLES    AGE   VERSION   INTERNAL-IP   EXTERNAL-IP      OS-IMAGE             KERNEL-VERSION      CONTAINER-RUN
+TIME
+cl1dc3oohjcqfp5nk94o-oniv   Ready    <none>   56m   v1.24.8   10.128.0.11   158.160.54.62    Ubuntu 20.04.6 LTS   5.4.0-165-generic   containerd://
+1.6.22
+cl1dc3oohjcqfp5nk94o-ybez   Ready    <none>   56m   v1.24.8   10.128.0.31   158.160.109.86   Ubuntu 20.04.6 LTS   5.4.0-165-generic   containerd://
+1.6.22
+[23:48:17] baykanurov:baykanurov_microservices git:(kubernetes-2) $ kubectl describe service ui -n dev | grep NodePort
+Type:                     NodePort
+NodePort:                 <unset>  32092/TCP
+```
+10. Запустил приложение
+```shell
+kubectl apply -f ./kubernetes/reddit/dev-namespace.yml
+kubectl apply -f ./kubernetes/reddit/ -n dev
+```
+11. Проверил, что приложение работает на каждой из нод
+![img.png](docs/img.png)
+![img1.png](docs/img1.png)
+P.S. Удалил инстанс кластера т.к. домашние задания проверяются долго, а потребление кластера на YC очень дорогое.

kubernetes/reddit/comment-deployment.yml

@@ -2,18 +2,26 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: comment-deployment
+  name: comment
+  labels:
+    app: reddit
+    component: comment
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: comment
+      app: reddit
+      component: comment
   template:
     metadata:
       name: comment
       labels:
-        app: comment
+        app: reddit
+        component: comment
     spec:
       containers:
-        - image: baykanurov/comment
-          name: comment
+      - image: baykanurov/comment
+        name: comment
+        env:
+        - name: COMMENT_DATABASE_HOST
+          value: comment-db

kubernetes/reddit/comment-mongodb-service.yml

@@ -0,0 +1,18 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: comment-db
+  labels:
+    app: reddit
+    component: mongo
+    comment-db: "true"
+spec:
+  ports:
+  - port: 27017
+    protocol: TCP
+    targetPort: 27017
+  selector:
+    app: reddit
+    component: mongo
+    comment-db: "true"

kubernetes/reddit/comment-service.yml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: comment
+  labels:
+    app: reddit
+    component: comment
+spec:
+  ports:
+  - port: 9292
+    protocol: TCP
+    targetPort: 9292
+  selector:
+    app: reddit
+    component: comment

kubernetes/reddit/dev-namespace.yml

@@ -0,0 +1,5 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: dev

kubernetes/reddit/mongo-deployment.yml

@@ -2,18 +2,33 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: mongo-deployment
+  name: mongo
+  labels:
+    app: reddit
+    component: mongo
+    comment-db: "true"
+    post-db: "true"
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: mongo
+      app: reddit
+      component: mongo
   template:
     metadata:
       name: mongo
       labels:
-        app: mongo
+        app: reddit
+        component: mongo
+        comment-db: "true"
+        post-db: "true"
     spec:
       containers:
-        - image: mongo:4.4
-          name: mongo
+      - image: mongo:4.4
+        name: mongo
+        volumeMounts:
+        - name: mongo-persistent-storage
+          mountPath: /data/db
+      volumes:
+      - name: mongo-persistent-storage
+        emptyDir: {}

kubernetes/reddit/mongodb-service.yml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: mongodb
+  labels:
+    app: reddit
+    component: mongo
+spec:
+  ports:
+  - port: 27017
+    protocol: TCP
+    targetPort: 27017
+  selector:
+    app: reddit
+    component: mongo

kubernetes/reddit/post-deployment.yml

@@ -2,18 +2,26 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: post-deployment
+  name: post
+  labels:
+    app: reddit
+    component: post
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: post
+      app: reddit
+      component: post
   template:
     metadata:
       name: post
       labels:
-        app: post
+        app: reddit
+        component: post
     spec:
       containers:
       - image: baykanurov/post
         name: post
+        env:
+        - name: POST_DATABASE_HOST
+          value: post-db

kubernetes/reddit/post-mongodb-service.yml

@@ -0,0 +1,18 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: post-db
+  labels:
+    app: reddit
+    component: mongo
+    post-db: "true"
+spec:
+  ports:
+  - port: 27017
+    protocol: TCP
+    targetPort: 27017
+  selector:
+    app: reddit
+    component: mongo
+    post-db: "true"

kubernetes/reddit/post-service.yml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: post
+  labels:
+    app: reddit
+    component: post
+spec:
+  ports:
+  - port: 5000
+    protocol: TCP
+    targetPort: 5000
+  selector:
+    app: reddit
+    component: post

kubernetes/reddit/ui-deployment.yml

@@ -2,18 +2,28 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: ui-deployment
+  name: ui
+  labels:
+    app: reddit
+    component: ui
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: ui
+      app: reddit
+      component: ui
   template:
     metadata:
-      name: ui
+      name: ui-pod
       labels:
-        app: ui
+        app: reddit
+        component: ui
     spec:
       containers:
         - image: baykanurov/ui
           name: ui
+          env:
+          - name: ENV
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace

kubernetes/reddit/ui-service.yml

@@ -0,0 +1,18 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: ui
+  labels:
+    app: reddit
+    component: ui
+spec:
+  type: NodePort
+  ports:
+  - nodePort: 32092
+    port: 80
+    protocol: TCP
+    targetPort: 9292
+  selector:
+    app: reddit
+    component: ui