added Don früh

k8s/deployment

@@ -0,0 +1,21 @@
+mkdir -p ~/web && cd web
+kubectl config set-context --current --namespace web
+# Starten Sie eine einzelne Instanz von Nginx
+kubectl create deployment nginx --image=nginx
+# Zeigen Sie die Dokumentation für Pod und SVC Manifeste an
+kubectl explain pods.spec
+kubectl explain svc.spec
+kubectl explain deployment.spec
+kubectl create deployment web \
+  --image=bee42/whoami:2.2.0 \
+  --dry-run=client \
+  --output=yaml >deployment.yaml
+cat deployment.yaml
+kubectl apply -f deployment.yaml
+kubectl get deploy
+kubectl get pods
+kubectl get rs
+kubectl delete deploy web
+cat deployment.yaml | kubectl apply -f -
+
+kubectl scale deployment nginx --replicas 1

k8s/install_nginx

@@ -0,0 +1,44 @@
+cd ~
+mkdir nginx && cd nginx
+
+# namespace
+kubectl create namespace nginx
+kubectl config set-context --current --namespace nginx
+
+# create pod and service nginx
+kubectl run nginx --image nginx --labels run=nginx --dry-run=client -o yaml >nginx.yaml
+kubectl apply -f nginx.yaml
+
+kubectl expose pod nginx -o yaml --port 80 --target-port 80 --dry-run=client >nginx-svc.yaml
+kubectl apply -f nginx-svc.yaml
+
+# access service
+kubectl run curl --tty -i --image curlimages/curl -- /bin/sh
+curl -i http://nginx
+exit
+
+# start new pod for nginx service ... same labels
+kubectl run nginx1 --image nginx --labels run=nginx --dry-run=client -o yaml >nginx1.yaml
+kubectl apply -f nginx1.yaml
+
+# describe manifest
+kubectl describe pods nginx
+kubectl describe svc nginx
+
+# deploy pod with nginx 1.19.7
+kubectl set image po nginx nginx=nginx:1.19.7
+kubectl set image po nginx1 nginx1=nginx:1.19.7
+
+#or 
+kubectl set image po *=nginx:1.19.8 -l run=nginx
+
+kubectl describe pods nginx
+kubectl describe pods nginx1
+kubectl describe svc nginx
+kubectl get pods
+kubectl get ep
+kubectl get svc
+kubectl attach curl --tty -i
+curl http://nginx
+exit
+kubectl attach -ti curl

k8s/nginx/nginx-svc.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  creationTimestamp: null
+  namespace: nginx
+  labels:
+    name: nginx
+  name: nginx
+spec:
+  ports:
+  - port: 80
+    protocol: TCP
+    targetPort: 80
+  selector:
+    run: nginx
+status:
+  loadBalancer: {}

k8s/nginx/nginx1.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  creationTimestamp: null
+  labels:
+    name: nginx
+  name: nginx1
+spec:
+  containers:
+  - image: nginx
+    name: nginx1
+    resources: {}
+  dnsPolicy: ClusterFirst
+  restartPolicy: Always
+status: {}

k8s/nginx/nginx_namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: nginx

k8s/nginx/nginx_pod.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+  namespace: nginx
+  labels:
+    name: nginx
+spec:
+  containers:
+  - name: nginx
+    image: nginx:1.19.3
+    resources:
+      limits:
+        memory: "128Mi"
+        cpu: "500m"
+    ports:
+      - containerPort: 80

k8s/nginx/nginx_service.yaml

@@ -0,0 +1,13 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx
+  namespace: nginx
+  labels:
+    name: nginx
+spec:
+  ports:
+  - protocol: TCP
+    port: 80
+    targetPort: 80

k8s/pods

@@ -13,4 +13,58 @@ kubectl run whoami --image bee42/whoami:2.2.0 --expose --port 80
 kubectl get pod whoami -o yaml
 
 # kann zur erstellung der YAML genutzt werden. 
-kubectl run whoami2 --image bee42/whoami:2.2.0 --labels=run=whoami --dry-run=client -o yaml >whoami-pod.yaml
+kubectl run whoami2 --image bee42/whoami:2.2.0 --labels=run=whoami --dry-run=client -o yaml >whoami-pod.yaml
+
+# Show Labels
+kubectl get pods --show-labels
+
+# Test iin Pod
+kubectl run curl --tty -i --image curlimages/curl -- /bin/sh
+curl -i http://nginx
+
+# port weiterleiten 
+kubectl port-forward services/nginx 8091:80 &
+
+# scale Pods
+
+kubectl scale deployments/web --replicas=3
+
+kubectl set image deployment/web nginx=nginx:1.19.4  
+kubectl rollout status -w deployment/web
+kubectl rollout undo deployment/web
+kubectl rollout status -w deployment/web
+kubectl rollout history deployment/web
+kubectl rollout undo deployment/web --to-revision=1
+
+# Better annotate replicaset !!
+kubectl annotate deployment web kubernetes.io/change-cause="Release 1.19.3" --overwrite=true
+
+#or
+
+kubectl get rs
+NAME             DESIRED   CURRENT   READY   AGE
+web-85dfdff5d    0         0         0       28m
+web-548df7676c   0         0         0       46m
+web-6f4f87dd45   3         3         3       26m
+kubectl annotate rs web-6f4f87dd45  kubernetes.io/change-cause="Release 1.19.5" --overwrite=true
+kubectl rollout history deploy web
+deployment.apps/web 
+REVISION  CHANGE-CAUSE
+4         <none>
+5         <none>
+6         Release 1.19.5
+# new deployment
+
+kubectl get rs -o json |jq -r .items[].metadata.annotations.\"deployment.kubernetes.io/revision\"
+3
+6
+5
+
+
+
+#cat pod.json | kubectl replace -f -
+#kubectl replace --force -f ./pod.json
+kubectl get pods
+kubectl get pod <web pod> -o yaml | sed 's/\(image: nginx\):.*$/\1:1.19.3/' | kubectl replace -f -
+
+#kubectl get pod web-548df7676c-v48kv -o yaml | sed 's/\(image: nginx\):.*$/\1:1.19.4/' | kubectl replace -f - web-548df7676c-rzp7v