learn k8s

03-installation-and-setup/kind-bind-mount-1/test.cc

@@ -0,0 +1 @@
+XXXX

03-installation-and-setup/kind-bind-mount-2/test.xx

@@ -0,0 +1 @@
+XXXX

04-built-in-resource-types/Deployment/Deployment.nginx-minimal.yaml

@@ -14,4 +14,5 @@ spec:
     spec:
       containers:
         - name: nginx
-          image: nginx:1.26.0
+          # Change image tag then ReplicaSet will create new Pods
+          image: nginx:1.25.0

04-built-in-resource-types/Deployment/Taskfile.yaml

@@ -28,8 +28,12 @@ tasks:
     desc: "Roll the pods in one of the deployments"
     cmds:
       - kubectl rollout restart deployment nginx-better
+      # Switch to previous ReplicaSet
+
       - watch "kubectl get pods"
 
+      # kubectl rollout undo deployment nginx-better
+
   05-delete-namespace:
     desc: "Delete the namespace to clean up"
     cmds:

04-built-in-resource-types/Ingress/Ingress.minimal-nginx.yaml

@@ -15,6 +15,11 @@ spec:
             pathType: ImplementationSpecific
             backend:
               service:
-                name: nginx-clusterip
+                name: nginx-nodeport
                 port:
                   number: 80
+# kubectl run curl-pod -it --rm --image=curlimages/curl --command -- sh
+# curl -H "Host: ingress-example-nginx.com" <node_ip>:<node_port>
+# -H to specify the host header
+# <node_ip>: is the IP of the node where the Ingress controller is running
+# <node_port>: is the NodePort of the Ingress controller

04-built-in-resource-types/Service/Taskfile.yaml

@@ -42,3 +42,18 @@ tasks:
       - cmd: gum style "🚨 Deleting the namespace recursively deletes the resources inside of it! 🚨 "
         silent: true
       - kubectl delete -f Namespace.yaml
+# Debug shell on a node => It create a debug pod on the node
+# kubectl debug node/kind-worker2 -it --image=ubuntu
+
+# Debug shell on a pod => It create a debug pod on the same node
+# kubectl run curl-pod -it --rm --image=curlimages/curl --command -- sh
+# curl <pod_ip>:<pod_port>
+# curl <service_ip or service_name>:<service_port>
+# eg: curl nginx-clusterip
+# node_port defined in the service
+# eg: curl <node_ip>:<node_port>
+
+# kubectl run curl-pod -it --rm -n default --image=curlimages/curl --command -- sh
+# outside namespace
+# curl <service_name>.<namespace>.svc.cluster.local
+# eg: curl nginx-clusterip.04--service.svc.cluster.local

05-helm/postgresql/Taskfile.yaml

@@ -34,6 +34,7 @@ tasks:
         silent: true
       - helm registry login registry-1.docker.io
     desc: Login to OCI registry
+    # sonthh98/<docker-hub_password>
 
   05-list-registry:
     cmds:

06-demo-application/api-golang/Taskfile.yaml

@@ -2,7 +2,7 @@ version: "3"
 
 vars:
   DATABASE_URL: "postgres://postgres:foobarbaz@localhost:5432/postgres"
-  IMAGE_REPO: sidpalas/devops-directive-docker-course-api-golang
+  IMAGE_REPO: sonthh98/devops-directive-docker-course-api-golang
   IMAGE_TAG: foobarbaz
 
 tasks:

06-demo-application/api-node/Taskfile.yaml

@@ -2,14 +2,14 @@ version: "3"
 
 vars:
   DATABASE_URL: "postgres://postgres:foobarbaz@localhost:5432/postgres"
-  IMAGE_REPO: sidpalas/devops-directive-docker-course-api-node
+  IMAGE_REPO: sonthh98/devops-directive-docker-course-api-node
   IMAGE_TAG: foobarbaz
 
 tasks:
   build-container-image:
     desc: Build container image
     cmds:
-      - docker build -t {{.IMAGE_REPO}}{{.IMAGE_TAG}} .
+      - docker build -t {{.IMAGE_REPO}}:{{.IMAGE_TAG}} .
 
   build-container-image-multi-arch:
     desc: Build multi-arch container image

06-demo-application/client-react/Taskfile.yaml

@@ -1,7 +1,7 @@
 version: "3"
 
 vars:
-  IMAGE_REPO: sidpalas/devops-directive-docker-course-client-react-nginx
+  IMAGE_REPO: sonthh98/devops-directive-docker-course-client-react-nginx
   IMAGE_TAG: foobarbaz
 
 tasks:

06-demo-application/load-generator-python/Taskfile.yaml

@@ -1,7 +1,7 @@
 version: "3"
 
 vars:
-  IMAGE_REPO: sidpalas/devops-directive-kubernetes-course-load-generator-python
+  IMAGE_REPO: sonthh98/devops-directive-kubernetes-course-load-generator-python
   IMAGE_TAG: foobarbaz
 
 tasks:

06-demo-application/postgresql/Taskfile.yaml

@@ -1,7 +1,7 @@
 version: "3"
 
 vars:
-  IMAGE_REPO: sidpalas/devops-directive-kubernetes-course-db-migrator
+  IMAGE_REPO: sonthh98/devops-directive-kubernetes-course-db-migrator
   IMAGE_TAG: foobarbaz
 
 tasks:

07-deploying-demo-application/api-golang/Deployment.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
         - name: api-golang
-          image: sidpalas/devops-directive-docker-course-api-golang:foobarbaz
+          image: sonthh98/devops-directive-docker-course-api-golang:foobarbaz
           env:
             - name: PORT
               value: "8000"

07-deploying-demo-application/api-golang/IngressRoute.yaml

@@ -1,18 +1,18 @@
-apiVersion: traefik.containo.us/v1alpha1
-kind: IngressRoute
-metadata:
-  name: api-golang
-  namespace: demo-app
-spec:
-  entryPoints:
-    - web
-  routes:
-    - kind: Rule
-      match: Host(`kubernetes-course.devopsdirective.com`) && PathPrefix(`/api/golang`)
-      middlewares:
-        - name: strip-api-prefixes
-      services:
-        - kind: Service
-          name: api-golang
-          port: 8000
-          scheme: http
+# apiVersion: traefik.containo.us/v1alpha1
+# kind: IngressRoute
+# metadata:
+#   name: api-golang
+#   namespace: demo-app
+# spec:
+#   entryPoints:
+#     - web
+#   routes:
+#     - kind: Rule
+#       match: Host(`kubernetes-course.devopsdirective.com`) && PathPrefix(`/api/golang`)
+#       middlewares:
+#         - name: strip-api-prefixes
+#       services:
+#         - kind: Service
+#           name: api-golang
+#           port: 8000
+#           scheme: http

07-deploying-demo-application/api-golang/Secret.yml

@@ -6,4 +6,4 @@ metadata:
   name: api-golang-database-url
   namespace: demo-app
 stringData:
-  DATABASE_URL: postgres://postgres:foobarbaz@postgres-postgresql.postgres.svc.cluster.local:5432/postgres
+  DATABASE_URL: postgres://postgres:foobarbaz@postgres-postgresql.postgresx.svc.cluster.local:5432/postgres

07-deploying-demo-application/api-node/Deployment.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
         - name: api-node
-          image: sidpalas/devops-directive-docker-course-api-node:foobarbaz
+          image: sonthh98/devops-directive-docker-course-api-node:foobarbaz
           env:
             - name: PORT
               value: "3000"

07-deploying-demo-application/api-node/IngressRoute.yaml

@@ -1,18 +1,18 @@
-apiVersion: traefik.containo.us/v1alpha1
-kind: IngressRoute
-metadata:
-  name: api-node
-  namespace: demo-app
-spec:
-  entryPoints:
-    - web
-  routes:
-    - kind: Rule
-      match: Host(`kubernetes-course.devopsdirective.com`) && PathPrefix(`/api/node`)
-      middlewares:
-        - name: strip-api-prefixes
-      services:
-        - kind: Service
-          name: api-node
-          port: 3000
-          scheme: http
+# apiVersion: traefik.containo.us/v1alpha1
+# kind: IngressRoute
+# metadata:
+#   name: api-node
+#   namespace: demo-app
+# spec:
+#   entryPoints:
+#     - web
+#   routes:
+#     - kind: Rule
+#       match: Host(`kubernetes-course.devopsdirective.com`) && PathPrefix(`/api/node`)
+#       middlewares:
+#         - name: strip-api-prefixes
+#       services:
+#         - kind: Service
+#           name: api-node
+#           port: 3000
+#           scheme: http

07-deploying-demo-application/api-node/Secret.yaml

@@ -6,4 +6,4 @@ metadata:
   name: api-node-database-url
   namespace: demo-app
 stringData:
-  DATABASE_URL: postgres://postgres:foobarbaz@postgres-postgresql.postgres.svc.cluster.local:5432/postgres
+  DATABASE_URL: postgres://postgres:foobarbaz@postgres-postgresql.postgresx.svc.cluster.local:5432/postgres

07-deploying-demo-application/client-react/ConfigMap.yaml

@@ -13,7 +13,24 @@ data:
             add_header 'Content-Type' 'text/plain';
             return 200 "pong";
       }
-      
+      location /api/golang/ {
+            proxy_set_header X-Forwarded-Host $host;
+            proxy_set_header X-Forwarded-Server $host;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_http_version 1.1;
+
+            rewrite ^/api-golang/(.*) /$1 break;
+            proxy_pass http://api-golang:8000/;
+      }
+      location /api/node/ {
+            proxy_set_header X-Forwarded-Host $host;
+            proxy_set_header X-Forwarded-Server $host;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_http_version 1.1;
+
+            rewrite ^/api/node/(.*) /$1 break;
+            proxy_pass http://api-node:3000/;
+      }
       location / {
         root /usr/share/nginx/html;
         index index.html index.htm;

07-deploying-demo-application/client-react/Deployment.yaml

@@ -16,7 +16,7 @@ spec:
         app: client-react-nginx
     spec:
       containers:
-        - image: sidpalas/devops-directive-docker-course-client-react-nginx:foobarbaz
+        - image: sonthh98/devops-directive-docker-course-client-react-nginx:foobarbaz
           name: client-react-nginx
           ports:
             - containerPort: 8080

07-deploying-demo-application/client-react/IngressRoute.yaml

@@ -1,16 +1,16 @@
-apiVersion: traefik.containo.us/v1alpha1
-kind: IngressRoute
-metadata:
-  name: client-react-nginx
-  namespace: demo-app
-spec:
-  entryPoints:
-    - web
-  routes:
-    - kind: Rule
-      match: Host(`kubernetes-course.devopsdirective.com`)
-      services:
-        - kind: Service
-          name: client-react-nginx
-          port: 8080
-          scheme: http
+# apiVersion: traefik.containo.us/v1alpha1
+# kind: IngressRoute
+# metadata:
+#   name: client-react-nginx
+#   namespace: demo-app
+# spec:
+#   entryPoints:
+#     - web
+#   routes:
+#     - kind: Rule
+#       match: Host(`kubernetes-course.devopsdirective.com`)
+#       services:
+#         - kind: Service
+#           name: client-react-nginx
+#           port: 8080
+#           scheme: http

07-deploying-demo-application/common/Middleware.yaml

@@ -1,11 +1,11 @@
-apiVersion: traefik.containo.us/v1alpha1
-kind: Middleware
-metadata:
-  name: strip-api-prefixes
-  namespace: demo-app
-spec:
-  stripPrefix:
-    forceSlash: false
-    prefixes:
-      - /api/node
-      - /api/golang
+# apiVersion: traefik.containo.us/v1alpha1
+# kind: Middleware
+# metadata:
+#   name: strip-api-prefixes
+#   namespace: demo-app
+# spec:
+#   stripPrefix:
+#     forceSlash: false
+#     prefixes:
+#       - /api/node
+#       - /api/golang

07-deploying-demo-application/common/Taskfile.yaml

@@ -7,13 +7,13 @@ tasks:
       - kubectl apply -f Namespace.yaml
       - kubens demo-app
 
-  deploy-traefik:
-    desc: "Deploy Traefik using Helm"
-    cmds:
-      - helm repo add traefik https://traefik.github.io/charts
-      - helm upgrade --install -n traefik --create-namespace traefik traefik/traefik --version 20.8.0
+  # deploy-traefik:
+  #   desc: "Deploy Traefik using Helm"
+  #   cmds:
+  #     - helm repo add traefik https://traefik.github.io/charts
+  #     - helm upgrade --install -n traefik --create-namespace traefik traefik/traefik --version 20.8.0
 
-  apply-traefik-middleware:
-    desc: "Deploy Traefik middleware"
-    cmds:
-      - "kubectl apply -f Middleware.yaml"
+  # apply-traefik-middleware:
+  #   desc: "Deploy Traefik middleware"
+  #   cmds:
+  #     - "kubectl apply -f Middleware.yaml"

07-deploying-demo-application/load-generator-python/ConfigMap.yaml

@@ -6,6 +6,6 @@ metadata:
   name: load-generator-config
   namespace: demo-app
 data:
-  API_URL: http://api-node.demo-app.svc.cluster.local:3000
-  # API_URL: http://api-golang.demo-app.svc.cluster.local:8080
+  # API_URL: http://api-node.demo-app.svc.cluster.local:3000
+  API_URL: http://api-golang.demo-app.svc.cluster.local:8080
   DELAY_MS: "100"

07-deploying-demo-application/load-generator-python/Deployment.yaml

@@ -17,17 +17,17 @@ spec:
     spec:
       containers:
         - name: load-generator
-          image: sidpalas/devops-directive-kubernetes-course-load-generator-python:foobarbaz
+          image: sonthh98/devops-directive-kubernetes-course-load-generator-python:foobarbaz
           imagePullPolicy: Always
-          env:
-            - name: API_URL
-              value: http://api-node.demo-app.svc.cluster.local:3000
-            - name: DELAY_MS
-              value: "500"
+          # env:
+          #   - name: API_URL
+          #     value: http://api-node.demo-app.svc.cluster.local:3000
+          #   - name: DELAY_MS
+          #     value: "500"
           # Could alternatively move these to a configmap
-          # envFrom:
-          #   - configMapRef:
-          #       name: load-generator-config
+          envFrom:
+            - configMapRef:
+                name: load-generator-config
           resources:
             limits:
               memory: "50Mi"

07-deploying-demo-application/postgresql/Job.db-migrator.yaml

@@ -8,7 +8,7 @@ spec:
     spec:
       containers:
         - name: migrate
-          image: sidpalas/devops-directive-kubernetes-course-db-migrator:foobarbaz
+          image: sonthh98/devops-directive-kubernetes-course-db-migrator:foobarbaz
           args:
             - -path=/app/migrations
             - -database=$(DATABASE_URL)?sslmode=disable

07-deploying-demo-application/postgresql/Secret.db-password.yaml

@@ -6,4 +6,5 @@ metadata:
   namespace: demo-app
 type: Opaque
 stringData:
-  DATABASE_URL: postgres://postgres:[email protected]:5432/postgres
+  DATABASE_URL: postgres://postgres:[email protected]:5432/postgres
+  # cat /etc/resolv.conf in Postgres pod to get the cluster DNS suffix

07-deploying-demo-application/postgresql/Taskfile.yaml

@@ -7,7 +7,7 @@ tasks:
       - helm repo add bitnami https://charts.bitnami.com/bitnami
       - |
         helm upgrade --install \
-          -n postgres \
+          -n postgresx \
           postgres bitnami/postgresql \
           --set auth.postgresPassword=foobarbaz \
           --version 15.3.2 \