Diferències

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--- info:cursos:pue:devops:sesion12 [23/03/2019 01:35] – creat mate
+++ info:cursos:pue:devops:sesion12 [08/04/2020 06:59] (actual) – mate
@@ Línia 1: / Línia 1: @@
-= Sesión 12 : k8s
+= Sesión 12 : k8s (traefik)
+{{tag>devops cursos k8s}}
 == k8s
+=== lab (traefik)
   * traefik como ingress controller:<code yaml; traefik-rbac.yaml>
 ---
@@ Línia 160: / Línia 162: @@
 </code>
+=== lab (who)
+[[https://medium.com/@geraldcroes/kubernetes-traefik-101-when-simplicity-matters-957eeede2cf8]]
+<code yaml; whoami-deployment.yaml>
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: whoami-deployment
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: whoami
+  template:
+    metadata:
+      labels:
+        app: whoami
+    spec:
+      containers:
+      - name: whoami-container
+        image: containous/whoami
+</code>
+<code yaml; whoami-service.yaml>
+apiVersion: v1
+kind: Service
+metadata:
+  name: whoami-service
+spec:
+  ports:
+  - name: http
+    targetPort: 80
+    port: 80
+  selector:
+    app: whoami
+</code>
+<code yaml; whoami-ingress.yaml>
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: whoami-ingress
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  rules:
+  - host: whoami.localhost
+    http:
+      paths:
+      - path: /
+        backend:
+          serviceName: whoami-service
+          servicePort: http
+</code>
+si queremos NO tocar el localhost para que resuelva **whoami.localhost**, podemos lanzar este comando: ''curl -H 'Host: whoami.localhost' 192.168.99.100''
+también podemos usar [[http://nip.io]]:
+<code yaml; whoami-ingress.yaml>
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: whoami-ingress
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  rules:
+  - host: whoami-192-168-99-100.nip.io
+    http:
+      paths:
+      - path: /
+        backend:
+          serviceName: whoami-service
+          servicePort: http
+</code>
+<code yaml; whoareyou-deployment.yaml>
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: whoareyou-deployment
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: whoareyou
+  template:
+    metadata:
+      labels:
+        app: whoareyou
+    spec:
+      containers:
+      - name: whoareyou-container
+        image: containous/whoami
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: whoareyou-service
+spec:
+  ports:
+  - name: http
+    targetPort: 80
+    port: 80
+  selector:
+    app: whoareyou
+---
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: whoareyou-ingress
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  rules:
+  - host: whoareyou-192-168-99-100.nip.io
+    http:
+      paths:
+      - path: /
+        backend:
+          serviceName: whoareyou-service
+          servicePort: http
+</code>
+=== lab (flocker)
+  * ''minukube dashboard'' : lanza proceso dashboard web
+==== instalar (sin flocker) un WP y MYSQL
+  * mysql:<code yaml; mysql-secrets.yaml>
+apiVersion: v1
+kind: Secret
+metadata:
+  name: mysql-secret
+type: Opaque
+data:
+  password: cm9vdA==
+</code>
+<code yaml; mysql.yaml>
+apiVersion: v1
+kind: Service
+metadata:
+  name: wordpress-mysql
+  labels:
+    app: wordpress
+spec:
+  ports:
+    - port: 3306
+  selector:
+    app: wordpress
+    tier: mysql
+  clusterIP: None
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: mysql-pv-claim
+  labels:
+    app: wordpress
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 20Gi
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: wordpress-mysql
+  labels:
+    app: wordpress
+spec:
+  selector:
+    matchLabels:
+      app: wordpress
+      tier: mysql
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app: wordpress
+        tier: mysql
+    spec:
+      containers:
+      - image: mysql:5.6
+        name: mysql
+        env:
+        - name: MYSQL_ROOT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mysql-secret
+              key: password
+        ports:
+        - containerPort: 3306
+          name: mysql
+        volumeMounts:
+        - name: mysql-persistent-storage
+          mountPath: /var/lib/mysql
+      volumes:
+      - name: mysql-persistent-storage
+        persistentVolumeClaim:
+          claimName: mysql-pv-claim
+</code>
+<code yaml; wordpress.yaml>
+apiVersion: v1
+kind: Service
+metadata:
+  name: wordpress-service
+  labels:
+    app: wordpress
+spec:
+  ports:
+  - name: http
+    targetPort: 80
+    port: 80
+# - port: 80
+  selector:
+    app: wordpress
+    tier: frontend
+#  type: LoadBalancer
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: wp-pv-claim
+  labels:
+    app: wordpress
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 20Gi
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: wordpress
+  labels:
+    app: wordpress
+spec:
+#  replicas: 1
+  selector:
+    matchLabels:
+      app: wordpress
+      tier: frontend
+#  strategy:
+#    type: Recreate
+  template:
+    metadata:
+      labels:
+        app: wordpress
+        tier: frontend
+    spec:
+      containers:
+      - image: wordpress:4.8-apache
+        name: wordpress
+        env:
+        - name: WORDPRESS_DB_HOST
+          value: wordpress-mysql
+        - name: WORDPRESS_DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mysql-secret
+              key: password
+        ports:
+        - containerPort: 80
+          name: wordpress
+        volumeMounts:
+        - name: wordpress-persistent-storage
+          mountPath: /var/www/html
+      volumes:
+      - name: wordpress-persistent-storage
+        persistentVolumeClaim:
+          claimName: wp-pv-claim
+---
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: wordpress-ingress
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  rules:
+  - host: wordpress-192-168-99-100.nip.io
+    http:
+      paths:
+      - path: /
+        backend:
+          serviceName: wordpress-service
+          servicePort: http
+</code>
+  * ''kubectl edit <objeto>''
+  * ''kubectl scale --replicas=3 deployment/<pod>''
+  * ''kubectl autscale --min=3 --max=10 --cpu-percent=2 deplyment/<pod>''
+  * ''kubectl get all --all-namespaces''
+  * ''kubetel get all --namespace=<namespace>''
+    * lo que no se muestra:
+      * ''kubectl get pv''
+      * ''kubectl get pvc''
+      * ''kubectl get ingresses''
+  * ''kubectl api-resources''
+==== flocker
+  * instalación: [[https://flocker.readthedocs.io/en/latest/kubernetes-integration/]] <- fails!
+  * [[https://github.com/linux-on-ibm-z/docs/wiki/Building-Flocker]] <- fails!
+  * [[https://flocker.readthedocs.io/en/latest/supported/flockercontainers.html#flocker-containers]]
+== objetos kubernetes
+  * replicationcontroller: [[https://kubernetes.io/docs/concepts/workloads/controllers/replicationcontroller/]]
+  * replicaset: [[https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/]]
+  * deployment: [[https://kubernetes.io/docs/concepts/workloads/controllers/deployment/]]
+    * rollout, concepto de log de revisiones de deployment
+    * sección deployment, sección replicaset, sección pod
+  * daemonset: [[https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/]]
+  * statefulsets: [[https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/]]
+    * storageclassname : servicio de gestión de volúmenes
+  * persistentvolumes: [[https://kubernetes.io/docs/concepts/storage/persistent-volumes/]]
+    * modos:
+      * readWriteOnce : solo un POD puede usar ese volumen para lectura/escritura
+      * readOnlyMany
+      * readWriteMany
+    * persistentVolumeProvisioning: [[https://github.com/kubernetes/examples/blob/master/staging/persistent-volume-provisioning/README.md]]
+    * storage classes: [[https://kubernetes.io/docs/concepts/storage/storage-classes/]]
+  * secrets: [[https://kubernetes.io/docs/concepts/configuration/secret/]]
+  * labels: [[https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/]]
+== otros
+  * ''helm fetch <>'' : descarga