update

content/docs/kubernetes/networkpolicy.md

@@ -0,0 +1,50 @@
+---
+title: "NetworkPolicy "
+description: "networking"
+weight: 15
+---
+
+It looks like you want to apply a Kubernetes NetworkPolicy that you've defined in a file using `kubectl`, the command-line tool for interacting with Kubernetes. If you're asking about how to handle file input operations including the end-of-file (EOF) marker for creating or editing files directly in the command line, I can guide you through creating or appending to a file using terminal commands.
+
+### Creating a File with EOF Marker
+To create a new file or overwrite an existing file with your NetworkPolicy content directly from the terminal, you can use the following method:
+
+```bash
+cat <<EOF > networkpolicy.yaml
+kind: NetworkPolicy
+apiVersion: networking.k8s.io/v1
+metadata:
+  name: access-nginx # pick a name
+spec:
+  podSelector:
+    matchLabels:
+      app: nginx # selector for the pods
+  ingress: # allow ingress traffic
+  - from:
+    - podSelector: # from pods
+        matchLabels: # with this label
+          access: granted
+EOF
+```
+
+This command will start `cat` in "here document" mode, which allows input until the end-of-file marker `EOF` is reached. The content between the initial `cat <<EOF > networkpolicy.yaml` and the final `EOF` is written into the `networkpolicy.yaml` file.
+
+### Applying the NetworkPolicy
+Once you have the file ready (`networkpolicy.yaml`), you can apply it to your Kubernetes cluster with this command:
+
+```bash
+kubectl apply -f networkpolicy.yaml
+```
+
+This command tells `kubectl` to apply the configurations defined in `networkpolicy.yaml` to your Kubernetes cluster.
+
+### Checking the Application of the NetworkPolicy
+After applying the NetworkPolicy, you can confirm it's been applied correctly by listing all network policies in the `default` namespace:
+
+```bash
+kubectl get networkpolicy -n default
+```
+
+This will display all network policies that have been configured in the `default` namespace, including your new `internal-policy`.
+
+These steps will help you create, apply, and verify the application of your Kubernetes NetworkPolicy directly from the command line. If you have any more questions or need further assistance with Kubernetes, feel free to ask!

content/docs/kubernetes/use-core-dns.md

@@ -0,0 +1,26 @@
+---
+title: "Use Core DNS"
+description: "networking"
+weight: 16
+---
+
+
+sangam@sangam:~$ kubectl create service clusterip my-service --tcp=8080:8080
+service/my-service created
+sangam@sangam:~$ kubectl get service
+NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
+kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP    45h
+my-service   ClusterIP   10.106.213.25   <none>        8080/TCP   5s
+sangam@sangam:~$ kubectl run busybox --image=busybox -it -- /bin/sh
+If you don't see a command prompt, try pressing enter.
+/ # 
+/ # 
+/ # nslookup 10.106.213.25
+Server:		10.96.0.10
+Address:	10.96.0.10:53
+
+25.213.106.10.in-addr.arpa	name = my-service.default.svc.cluster.local
+
+/ # exit 
+
+

readme.md

@@ -116,16 +116,6 @@ git clone https://github.com/kubernetesdaily/dockerworkshop.git
 git clone https://github.com/kubernetesdaily/k8sworkshop.git
 ```
 
-10 Labs
-
-| No. | Title |
-|--- | --------- |
-|1 | Pre-requisit for this lab| [🔗](
-
-|8 | Service Type: NodePort,ClusterIP,LoadBalancer|
-|9 | Ingress Controller| [🔗](
-
-
 #### Cluster Architecture, Installation, and Configuration
 
 | No. | Title | Link |
@@ -147,23 +137,22 @@ git clone https://github.com/kubernetesdaily/k8sworkshop.git
 |3 | Multi-Container Pods | [🔗](/content/docs/kubernetes/multipod-container.md)|
 |4 | Labels & Selectors| [🔗](./content/docs/kubernetes/labels-selectors.md)|
 |5 | Kubernetes Service| [🔗](./content/docs/kubernetes/Services.md)| 
-|6 |Understand deployments and how to perform rolling update and rollbacks||[🔗](content/docs/kubernetes/Deployment-Replicaset.md)|
-|7 |Use ConfigMaps and Secrets to configure applications||[🔗](content/docs/kubernetes/ConfigMap.md) |
-|8 |Know how to scale applications||[🔗](  |
-|9 |Understand the primitives used to create robust, self-healing, application deployments||[🔗]( |
-|10 |Understand how resource limits can affect Pod scheduling||[🔗](  |
-|11 |Awareness of manifest management and common templating tools||[🔗]( |
+|6 |Understand deployments and how to perform rolling update and rollbacks|[🔗](content/docs/kubernetes/Deployment-Replicaset.md)|
+|7 |Use ConfigMaps and Secrets to configure applications|[🔗](content/docs/kubernetes/ConfigMap.md)|
+|8|Understand the primitives used to create robust, self-healing, application deployments||[🔗]( |
+|9 |Understand how resource limits can affect Pod scheduling||[🔗](  |
+|10 |Awareness of manifest management and common templating tools||[🔗]( |
 
 #### Services and Networking
 
 | No. | Title |
 |--- | --------- |
-|1 |Understand host networking configuration on the cluster nodes||[🔗](
-|2 |Understand connectivity between Pods||[🔗](
-|3 |Understand ClusterIP, NodePort, LoadBalancer service types and endpoints||[🔗](
-|4 |Know how to use Ingress controllers and Ingress resources ||[🔗](
-|5 |Know how to configure and use CoreDNS ||[🔗](
-|6 |Choose an appropriate container network interface plugin ||[🔗](
+|1 |Understand host networking configuration on the cluster nodes|[🔗]( |
+|2 |Understand connectivity between Pods|[🔗]( |
+|3 |Understand ClusterIP, NodePort, LoadBalancer service types and endpoints|[🔗](./content/docs/kubernetes/Service-Type.md)|
+|4 |Know how to use Ingress controllers and Ingress resources |[🔗](./content/docs/kubernetes/Ingress-Controller.md)|
+|5 |Know how to configure and use CoreDNS |[🔗]( |
+|6 |Choose an appropriate container network interface plugin |[🔗]( |
 
 #### Storage