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update kuber to working

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3
Containerization & Orchestration/Kubernetes/1-Information.md
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@@ -79,4 +79,5 @@ The **Control Plane** is the core management component of a Kubernetes cluster.
- **Worker (none)**
These nodes run application workloads and do not participate in control decisions.
---
image pull policy in kubernetes:

172
Containerization & Orchestration/Kubernetes/3-Commands.md
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@@ -2,34 +2,6 @@
This guide provides a concise reference for common `kubectl` commands used to manage Kubernetes clusters. Whether you’re managing nodes, namespaces, pods, deployments, or autoscaling, the examples below will help you perform everyday tasks with confidence.
---
## Table of Contents
- [Kubernetes Command Reference](#kubernetes-command-reference)
- [Table of Contents](#table-of-contents)
- [General Commands](#general-commands)
- [Node Management](#node-management)
- [Listing Nodes](#listing-nodes)
- [Labeling Nodes](#labeling-nodes)
- [Node Maintenance (Cordon/Drain)](#node-maintenance-cordondrain)
- [Namespace Management](#namespace-management)
- [Pod Management](#pod-management)
- [Listing Pods](#listing-pods)
- [Running a Pod](#running-a-pod)
- [Deleting a Pod](#deleting-a-pod)
- [API Resources \& Documentation](#api-resources--documentation)
- [Logs \& Pod Information](#logs--pod-information)
- [Applying YAML Files](#applying-yaml-files)
- [Viewing Cluster Resources](#viewing-cluster-resources)
- [ReplicaSet \& Deployment Management](#replicaset--deployment-management)
- [Scaling and Rollouts](#scaling-and-rollouts)
- [Autoscaling](#autoscaling)
- [Port Forwarding](#port-forwarding)
- [Additional Information](#additional-information)
---
## General Commands
- **List API Resources**
@@ -40,136 +12,6 @@ This guide provides a concise reference for common `kubectl` commands used to ma
```
---
## Node Management
### Listing Nodes
- **Show All Nodes**
```bash
kubectl get nodes
```
### Labeling Nodes
- **Set a Custom Label on a Node**
```bash
kubectl label node <node-name> kubernetes.io/<label-key>=<label-value>
```
> **Note:** Replace `<node-name>`, `<label-key>`, and `<label-value>` with your desired values.
### Node Maintenance (Cordon/Drain)
- **Cordon a Node**
Prevent new pods from being scheduled on the node.
```bash
kubectl cordon <node-name>
```
- **Uncordon a Node**
Mark the node as schedulable again.
```bash
kubectl uncordon <node-name>
```
- **Drain a Node**
Evict all pods from the node (excluding those managed by DaemonSets).
```bash
kubectl drain <node-name> --ignore-daemonsets --delete-local-data
```
> **Warning:** Draining a node will evict running pods. Ensure that you plan this action to avoid service disruption.
---
## Namespace Management
- **List All Namespaces**
```bash
kubectl get namespaces
# Or the shorthand:
kubectl get ns
```
- **Create a New Namespace**
```bash
kubectl create namespace <namespace-name>
```
---
## Pod Management
### Listing Pods
- **List Pods in the Default Namespace**
```bash
kubectl get pods
```
- **List Pods with Detailed Information (Wide Output)**
```bash
kubectl get pods -o wide
```
- **List Pods in a Specific Namespace**
```bash
kubectl get pods -o wide -n <namespace-name>
```
### Running a Pod
> **Note:** The `kubectl run` command is best suited for running single pods. For more complex deployments, consider using YAML manifests.
- **Basic Example:**
```bash
kubectl run <pod-name> --image=<image-name> --port=<port-number> -n <namespace-name>
```
- **Advanced Example with Multiple Options:**
```bash
kubectl run mypod --image=nginx --port=80 -n mynamespace \
--env="ENV_VAR_NAME=VALUE" --command -- nginx -g "daemon off;" \
--restart=Always --dry-run=client \
--labels="app=myapp,env=prod" \
--limits=cpu=100m,memory=256Mi --requests=cpu=50m,memory=128Mi
```
**Common Options Explained:**
- `--image`: Container image to use.
- `--port`: Port exposed by the container.
- `-n` or `--namespace`: Namespace in which to run the pod.
- `--env`: Set environment variables.
- `--command`: Treat the following arguments as the command to run.
- `--restart`: Pod restart policy (`Always`, `OnFailure`, or `Never`).
- `--labels`: Assign labels to the pod.
- `--dry-run`: Validate the command without creating the pod.
- `--limits` and `--requests`: Define resource limits and requests for the container.
### Deleting a Pod
- **Delete a Pod in a Specific Namespace**
```bash
kubectl delete pod <pod-name> -n <namespace-name>
```
---
## API Resources & Documentation
- **Get Detailed Documentation for an API Resource**
@@ -184,21 +26,10 @@ This guide provides a concise reference for common `kubectl` commands used to ma
kubectl explain pod
```
---
## Logs & Pod Information
- **Stream Logs for a Running Pod**
```bash
kubectl logs -f -n <namespace-name> <pod-name>
kubectl explain pod.metadata
```
- **Get Detailed Information About a Pod**
```bash
kubectl describe pod <pod-name> -n <namespace-name>
```
---
@@ -296,3 +127,4 @@ kubectl port-forward -n <namespace-name> svc/<service-name> <local-port>:<target
- **Static Manifest Files**
Any YAML files placed in `/etc/kubernetes/manifests/` are automatically loaded when the kubelet starts (for example, after a server reboot).

13
Containerization & Orchestration/Kubernetes/4-BasicSetup.md Normal file
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@@ -0,0 +1,13 @@
```bash
kubectl complation <shell>
```
exapmles:
```bash
kubectl completion zsh > "${fpath[1]}/_kubectl"
```
```bash
kubectl completion bash > ~/.kube/completion.bash.inc
```

72
Containerization & Orchestration/Kubernetes/components/1-NameSpace.md Normal file
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@@ -0,0 +1,72 @@
# Kubernetes Namespaces Guide
Kubernetes **namespaces** allow you to organize and isolate resources within your cluster.
---
## 🧾 Listing Namespaces
To list all namespaces:
```bash
kubectl get namespaces
```
or the shorthand:
```bash
kubectl get ns
```
---
## 🛠️ Creating a Namespace
Create a new namespace:
```bash
kubectl create namespace <namespace-name>
```
or:
```bash
kubectl create ns <namespace-name>
```
---
## 🗑️ Deleting a Namespace
Delete a namespace:
```bash
kubectl delete ns <namespace-name>
```
---
## ⚠️ Best Practices & Notes
* **Namespaces are isolated**, but they **can still communicate** with each other by default.
* It is **not recommended to create namespaces that start with `kube-`**, as those are typically reserved for system components.
---
## 📄 Creating a Namespace with a Manifest
You can define a namespace using a YAML manifest:
```yaml
apiVersion: v1
kind: Namespace
metadata:
name: namespace-test
```
Apply it using:
```bash
kubectl apply -f namespace.yaml
```

95
Containerization & Orchestration/Kubernetes/components/2-Pod.md Normal file
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@@ -0,0 +1,95 @@
## Pod Management
### Listing Pods
- **List Pods in the Default Namespace**
```bash
kubectl get pods
```
- **List Pods with Detailed Information (Wide Output)**
```bash
kubectl get pods -o wide
```
- **List Pods in a Specific Namespace**
```bash
kubectl get pods -o wide -n <namespace-name>
```
### Running a Pod
> **Note:** The `kubectl run` command is best suited for running single pods. For more complex deployments, consider using YAML manifests.
```bash
kubectl run <pod-name> --image=<image-name>
```
```bash
kubectl run <pod-name> --image=<image-name> -n <namespace>
```
```bash
kubectl delete pod <pod-name> -n <namespace-name>
```
```bash
kubectl delete pod <pod-name> -n <namespace-name> --force
```
```bash
kubectl delete pod <pod-name> -n <namespace-name> --force --grace-period 0
```
```bash
kubectl edit pod -n <namepsace> <podname>
```
Pod Can not been edit (not editable)
```bash
kubectl exec -it -n <namespace> <podname> -- <command or shell>
```
```yaml
apiVersion: v1
kind: Pod
metadata:
namespace: dev
name: pod-1
labels:
label1: test
label2: test2
app.kubernetes.io/label3: test3
app.kubernetes.io/label4: test4
spec:
containers:
- name: nginx-server
image: nginx
- name: nginx-exporter
image: nginx-exporter
- name: ubuntu-c0
image: ubuntu
command: ["/bin/bash","-c","while true; do echo hello-world; sleep 5; done"]
resources:
limits:
memory: "256Mi"
cpu: "250m"
requests:
memory: "128Mi"
cpu: "125m"
nodeSelector:
hostname: k3s
app.kubernetes.io/disk: ssd
```

0
Containerization & Orchestration/Kubernetes/components/3-Replicaset.md Normal file
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9
Containerization & Orchestration/Kubernetes/label.md Normal file
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@@ -0,0 +1,9 @@
- **Set a Custom Label on a Node**
```bash
kubectl label node <node-name> kubernetes.io/<label-key>=<label-value>
```
> **Note:** Replace `<node-name>`, `<label-key>`, and `<label-value>` with your desired values.

27
Containerization & Orchestration/Kubernetes/log-debug.md Normal file
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@@ -0,0 +1,27 @@
- **Stream Logs for a Running Pod**
```bash
kubectl logs -f -n <namespace-name> <pod-name>
```
```bash
kubectl logs -f -n <namespace-name> <pod-name> -c <container-name>
```
- **Get Detailed Information About a Pod**
```bash
kubectl describe pod <pod-name> -n <namespace-name>
```
in log swith the pod need to be up
but in describe dont need to pod be up
describe work on all components

44
Containerization & Orchestration/Kubernetes/node-manage.md Normal file
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@@ -0,0 +1,44 @@
## Node Management
### Listing Nodes
- **Show All Nodes**
```bash
kubectl get nodes
```
```bash
kubectl get nodes --show-lables
```
### Node Maintenance (Cordon/Drain)
- **Cordon a Node**
Prevent new pods from being scheduled on the node.
```bash
kubectl cordon <node-name>
```
- **Uncordon a Node**
Mark the node as schedulable again.
```bash
kubectl uncordon <node-name>
```
- **Drain a Node**
Evict all pods from the node (excluding those managed by DaemonSets).
```bash
kubectl drain <node-name> --ignore-daemonsets --delete-local-data
```
> **Warning:** Draining a node will evict running pods. Ensure that you plan this action to avoid service disruption.
---