11.K8s

demo/11.K8s/README.md

@@ -0,0 +1,116 @@
+# 11.K8s
+
+chrome -> /etc/hosts (178.124.206.53 app.k8s-25.sa app.k8s-26.sa ) -> 178.124.206.53 -> k8s (ingress-controller):30001 -> service:80 -> pod:80
+
+```
+root@jump:~# cat /etc/nginx/conf.d/k8s_sa.k8s.conf
+## Ansible managed
+## SA group cluster
+server {
+  listen 80;
+  listen [::]:80;
+
+  server_name "~^.*\.k8s-(\d+)\.sa$";
+
+  location / {
+        proxy_set_header Host $host;
+        proxy_pass       http://192.168.208.$1:30001;
+  }
+}
+
+
+```
+
+## "Local" DNS
+
+Windows
+
+> c:\Windows\System32\Drivers\etc\hosts
+
+Linux/Mac
+
+> /etc/hosts
+
+```
+178.124.206.53 app.k8s-XX.sa
+```
+
+## Ingress-controller changes
+
+```bash
+Changes in ingress service
+
+...
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/instance: ingress-nginx
+    app.kubernetes.io/name: ingress-nginx
+    app.kubernetes.io/part-of: ingress-nginx
+    app.kubernetes.io/version: 1.12.0
+  name: ingress-nginx-controller
+  namespace: ingress-nginx
+spec:
+  ipFamilies:
+  - IPv4
+  ipFamilyPolicy: SingleStack
+  ports:
+  - appProtocol: http
+    name: http
+    port: 80
+    protocol: TCP
+    nodePort: 30001      ### Added line
+    targetPort: http
+  - appProtocol: https
+    name: https
+    port: 443
+    protocol: TCP
+    targetPort: https
+```
+
+---
+
+## History
+
+```
+466  cd 11.K8s/
+  467  ls
+  468  rm k9s_Linux_amd64.tar.gz
+  469  rm kubectl
+  470  vim pod_exec.yaml
+  471  kubectl apply -f pod_exec.yaml
+  472  vim pod_exec.yaml
+  473  kubectl delete -f pod_exec.yaml
+  474  vim pod_live.yaml
+  475  kubectl apply -f pod_live.yaml
+  476  kubectl describe pod liveness-exec
+  477  kubectl delete -f pod_live.yaml
+  478  vim app.yaml
+  479  kubectl apply -f app.yaml
+  480  vim app.yaml
+  481  kubectl apply -f app.yaml
+  482  vim app.yaml
+  483  kubectl apply -f app.yaml
+  484  vim app.yaml
+  485  kubectl apply -f app.yaml
+  486  vim app.yaml
+  487  kubectl apply -f app.yaml
+  488  vim app.yaml
+  489  kubectl apply -f app.yaml
+  490  vim app.yaml
+  491  kubectl apply -f app.yaml
+  492  vim app.yaml
+  493  kubectl apply -f app.yaml
+  494  vim app.yaml
+  495  kubectl apply -f app.yaml
+  496  vim app.yaml
+  497  kubectl apply -f app.yaml
+  498  wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/refs/tags/controller-v1.12.0/deploy/static/provider/baremetal/deploy.yaml -O ingress-controller.yaml
+  499  vim ingress-controller.yaml
+  500  kubectl apply -f ingress-controller.yaml
+  501  vim app.yaml
+  502  kubectl apply -f app.yaml
+  503  history
+```