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--- devops:docker:kubernetes [2024/03/05 19:41] – skipidar
+++ devops:docker:kubernetes [2024/07/21 14:33] (current) – skipidar
@@ Line 141: / Line 141: @@
 ==== Vagrant environment ====
 Use the Vagrant environment for the experiments
-https://github.com/skipidar/Vagrant-Kubernetes
+<del>https://github.com/skipidar/Vagrant-Kubernetes</del>
+https://github.com/alfrepo/Vagrant_Templates/tree/master/Workspace
@@ Line 150: / Line 152: @@
-=== On Windows - Dont deploy in minikube===
+=== Prefered: On Windows - do use minikube===
-Why not Minukube: the **minikube** may only be started from disk C:\ Otherwise it will throw an error, that it does not recognize the path.
+- install "Docker Desktop"
+- install minikube directly on Windows, in order not to mess around with port forwarding etc.
+see
+https://wiki.alf.digital/doku.php?id=devops:docker:kubernetes:tutorial-win-minikube
+=== Alternative: On Windows - Deploy in Linux-guest Vagrant VM - Minikube distribution ===
-=== On Windows - Deploy in Linux-guest Vagrant VM - Minikube distribution ===
+Challenges: redirecting the minikube console etc. is challenging.
 OS: Ubuntu
@@ Line 976: / Line 985: @@
 https://github.com/Apress/Kubernetes-Native-Development/blob/main/snippets/chapter1/webserver-deployment.yaml
+Generate deployment config with a service.
+<sxh shell>
+kubectl create deployment demo --image=springguides/demo --dry-run -o=yaml > deployment.yaml
+echo --- >> deployment.yaml
+kubectl create service clusterip demo --tcp=8080:8080 --dry-run -o=yaml >> deployment.yaml
+</sxh>
+Generated deployment config:
+<sxh shell>
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  creationTimestamp: null
+  labels:
+    app: demo
+  name: demo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: demo
+  strategy:
+    type: RollingUpdate
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: demo
+    spec:
+      containers:
+      - image: springguides/demo
+        name: demo
+        resources: {}
+status: {}
+</sxh>
+Lets go step by step through the config:
+<sxh shell>
+metadata:
+  creationTimestamp: null
+  labels:
+    app: demo
+  name: demo
+Assign label "app". Value: demo
+Labels help identify and categorize resources. By assigning specific labels, you can easily distinguish between different types or groups of resources within your cluster.
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: demo
+In the provided Kubernetes deployment specification, the selector section defines a criteria for matching Pods to the deployment. Let's break it down:
+selector:
+This key signifies the start of the selector configuration within the deployment spec.
+matchLabels:
+This key specifies that the selector will use labels for matching.
+app: demo:
+This entry defines the actual matching criteria. It specifies that the selector will only consider Pods with a label named app and a value of demo.
+spec:
+  replicas: 1
+    spec:
+      containers:
+      - image: springguides/demo
+        name: demo
+        resources: {}
+This defines the name assigned to the container within the Pod.
+</sxh>