RadinPirouz
88
Code Management/Git/Gitlab/Install/baremetal.md
Normal file
88
Code Management/Git/Gitlab/Install/baremetal.md
Normal file
@@ -0,0 +1,88 @@
|
||||
# Setting Up GitLab CE on Ubuntu
|
||||
|
||||
Follow the steps below to install and configure GitLab Community Edition (CE) on your Ubuntu system.
|
||||
|
||||
---
|
||||
|
||||
## Step 1: Update the System
|
||||
Ensure your package lists are up-to-date:
|
||||
```bash
|
||||
sudo apt update
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Step 2: Install Dependencies
|
||||
Install required packages for GitLab:
|
||||
```bash
|
||||
sudo apt install -y ca-certificates curl openssh-server postfix tzdata perl
|
||||
```
|
||||
|
||||
- **ca-certificates**: Ensures proper SSL certificate handling.
|
||||
- **curl**: For downloading files.
|
||||
- **openssh-server**: For SSH-based Git operations.
|
||||
- **postfix**: Mail transport agent for email notifications.
|
||||
- **tzdata**: Time zone data.
|
||||
- **perl**: Required by GitLab scripts.
|
||||
|
||||
During the installation, configure **Postfix** to match your mail setup. If unsure, select "Internet Site" and provide your domain.
|
||||
|
||||
---
|
||||
|
||||
## Step 3: Add GitLab's Repository
|
||||
Download and run the repository setup script:
|
||||
```bash
|
||||
curl -LO https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh
|
||||
sudo bash script.deb.sh
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Step 4: Install GitLab CE
|
||||
Install the GitLab CE package:
|
||||
```bash
|
||||
sudo apt install -y gitlab-ce
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Step 5: Configure GitLab
|
||||
Edit the GitLab configuration file to match your environment:
|
||||
```bash
|
||||
sudo vim /etc/gitlab/gitlab.rb
|
||||
```
|
||||
|
||||
- Modify the `external_url` setting to your desired domain or IP.
|
||||
|
||||
Save and exit the editor.
|
||||
|
||||
---
|
||||
|
||||
## Step 6: Apply the Configuration
|
||||
Reconfigure GitLab to apply the changes:
|
||||
```bash
|
||||
sudo gitlab-ctl reconfigure
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Step 7: Retrieve the Initial Root Password
|
||||
After configuration, retrieve the initial root password:
|
||||
```bash
|
||||
sudo cat /etc/gitlab/initial_root_password
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Notes
|
||||
- The default admin username is `root`.
|
||||
- Save the password securely and change it after the first login.
|
||||
|
||||
---
|
||||
|
||||
## Troubleshooting
|
||||
- If you encounter issues, consult the [GitLab Documentation](https://docs.gitlab.com) or check logs in `/var/log/gitlab`.
|
||||
|
||||
---
|
||||
|
||||
Enjoy using GitLab CE!
|
||||
@@ -1,67 +1,124 @@
|
||||
# Kubernetes
|
||||
|
||||
## `kubectl` Command Reference
|
||||
|
||||
### Get State of API Resources
|
||||
```bash
|
||||
kubectl api-resources
|
||||
```
|
||||
# Kubernetes Command Reference
|
||||
|
||||
This document provides a reference for common `kubectl` commands used for managing Kubernetes clusters. Use the examples and explanations below to help manage nodes, namespaces, pods, deployments, and more.
|
||||
|
||||
## Table of Contents
|
||||
|
||||
- [Kubernetes Command Reference](#kubernetes-command-reference)
|
||||
- [Table of Contents](#table-of-contents)
|
||||
- [General Commands](#general-commands)
|
||||
- [Node Management](#node-management)
|
||||
- [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 and Documentation](#api-resources-and-documentation)
|
||||
- [Logs and Pod Information](#logs-and-pod-information)
|
||||
- [Applying YAML Files](#applying-yaml-files)
|
||||
- [Managing Nodes and Labels](#managing-nodes-and-labels)
|
||||
- [Viewing Cluster Resources](#viewing-cluster-resources)
|
||||
- [ReplicaSet and Deployment Management](#replicaset-and-deployment-management)
|
||||
- [Additional Information](#additional-information)
|
||||
|
||||
---
|
||||
|
||||
## General Commands
|
||||
|
||||
- **List API Resources**
|
||||
|
||||
```bash
|
||||
kubectl api-resources
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Node Management
|
||||
|
||||
- **Show all nodes**
|
||||
|
||||
### Node Management
|
||||
- **Show all nodes:**
|
||||
```bash
|
||||
kubectl get node
|
||||
```
|
||||
|
||||
### Namespace Management
|
||||
- **List all namespaces:**
|
||||
- **Set a label on a node**
|
||||
|
||||
```bash
|
||||
kubectl label nodes <node-name> kubernetes.io/<label-key>=<label-value>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Namespace Management
|
||||
|
||||
- **List all namespaces**
|
||||
|
||||
```bash
|
||||
kubectl get namespaces
|
||||
```
|
||||
```bash
|
||||
# or the abbreviated version:
|
||||
kubectl get ns
|
||||
```
|
||||
- **Create a custom namespace:**
|
||||
|
||||
- **Create a custom namespace**
|
||||
|
||||
```bash
|
||||
kubectl create ns <namespace-name>
|
||||
```
|
||||
|
||||
### Pod Management
|
||||
- **Get the list of pods in the default namespace:**
|
||||
---
|
||||
|
||||
## Pod Management
|
||||
|
||||
### Listing Pods
|
||||
|
||||
- **List pods in the default namespace**
|
||||
|
||||
```bash
|
||||
kubectl get pod
|
||||
```
|
||||
- **Get the list of pods in the default namespace with full information:**
|
||||
|
||||
- **List pods with detailed information (wide output) in the default namespace**
|
||||
|
||||
```bash
|
||||
kubectl get pod -o wide
|
||||
```
|
||||
- **Get the list of pods in a custom namespace with full information:**
|
||||
|
||||
- **List pods with detailed information in a specific namespace**
|
||||
|
||||
```bash
|
||||
kubectl get pod -o wide -n <name-space>
|
||||
kubectl get pod -o wide -n <namespace-name>
|
||||
```
|
||||
|
||||
### Running a Pod
|
||||
- **Run a new pod:**
|
||||
|
||||
- **Run a new pod**
|
||||
|
||||
Use the following command structure to run a pod with various options:
|
||||
|
||||
```bash
|
||||
kubectl run <pod-name> <switch> {
|
||||
--image=<image-name>, # Specifies the container image to use
|
||||
--port=<portnumber>, # Specifies the port that the container exposes
|
||||
-n <namespace-name>, # Specifies the namespace
|
||||
--env="KEY=VALUE", # Sets environment variables in the container
|
||||
--command, # Treats the rest of the arguments as the command to run in the container
|
||||
--replicas=<number>, # Specifies the number of replicas for the deployment
|
||||
--labels="key=value,key2=value2", # Adds labels to the pod(s)
|
||||
--dry-run=client, # Prints the object that would be sent, without creating it
|
||||
--restart=<Always|OnFailure|Never>, # Determines the restart policy for the pod
|
||||
--overrides='<json>', # Provides a JSON override for the generated object
|
||||
--image-pull-policy=<policy>, # Specifies the image pull policy (Always, IfNotPresent, Never)
|
||||
--limits=cpu=<cpu>,memory=<memory>, # Specifies resource limits for the container
|
||||
--requests=cpu=<cpu>,memory=<memory> # Specifies resource requests for the container
|
||||
}
|
||||
kubectl run <pod-name> <switch> {
|
||||
--image=<image-name>, # Container image to use
|
||||
--port=<port-number>, # Port that the container exposes
|
||||
-n <namespace-name>, # Namespace in which to run the pod
|
||||
--env="KEY=VALUE", # Environment variables for the container
|
||||
--command, # Treat the following arguments as the command
|
||||
--replicas=<number>, # Number of pod replicas to create
|
||||
--labels="key=value,key2=value2", # Labels to assign to the pod(s)
|
||||
--dry-run=client, # Print the object without creating it
|
||||
--restart=<Always|OnFailure|Never>, # Pod restart policy
|
||||
--overrides='<json>', # JSON override for the generated object
|
||||
--image-pull-policy=<policy>, # Image pull policy (Always, IfNotPresent, Never)
|
||||
--limits=cpu=<cpu>,memory=<memory>, # Resource limits for the container
|
||||
--requests=cpu=<cpu>,memory=<memory> # Resource requests for the container
|
||||
}
|
||||
```
|
||||
- *Example:*
|
||||
|
||||
- **Example:**
|
||||
|
||||
```bash
|
||||
kubectl run mypod --image=nginx --port=80 -n mynamespace \
|
||||
kubectl run mypod --image=nginx --port=80 -n mynamespace \
|
||||
--env="ENV_VAR_NAME=VALUE" --command -- nginx -g "daemon off;" \
|
||||
--replicas=3 --labels="app=myapp,env=prod" --dry-run=client \
|
||||
--restart=Always --overrides='{"spec": {"containers": [{"name": "nginx", "image": "nginx"}]}}' \
|
||||
@@ -69,34 +126,118 @@ kubectl api-resources
|
||||
--requests=cpu=50m,memory=128Mi
|
||||
```
|
||||
|
||||
|
||||
### Deleting a Pod
|
||||
- **Delete a pod in a custom namespace:**
|
||||
|
||||
- **Delete a pod in a custom namespace**
|
||||
|
||||
```bash
|
||||
kubectl delete pod -n <namespace-name> <pod-name>
|
||||
```
|
||||
|
||||
### API Resource Documentation
|
||||
- **Get documentation of an API resource:**
|
||||
---
|
||||
|
||||
## API Resources and Documentation
|
||||
|
||||
- **Get documentation for an API resource**
|
||||
|
||||
```bash
|
||||
kubectl explain <api-resource-name>
|
||||
```
|
||||
|
||||
- *Example:*
|
||||
|
||||
```bash
|
||||
kubectl explain pod
|
||||
```
|
||||
|
||||
### Logging and Pod Information
|
||||
- **Get and follow logs of a pod (pod must be created and running):**
|
||||
---
|
||||
|
||||
## Logs and Pod Information
|
||||
|
||||
- **Stream logs for a running pod**
|
||||
|
||||
```bash
|
||||
kubectl logs -f -n <namespace-name> <podname>
|
||||
```
|
||||
- **Get logs and state information of a pod (works at any time):**
|
||||
```bash
|
||||
kubectl describe pod -n <namespace-name> <podname>
|
||||
kubectl logs -f -n <namespace-name> <pod-name>
|
||||
```
|
||||
|
||||
### Apply Yaml File
|
||||
```bash
|
||||
kubectl apply -f <yaml-file> -n <namespace-name>
|
||||
```
|
||||
- **Get detailed state and log information for a pod**
|
||||
|
||||
```bash
|
||||
kubectl describe pod -n <namespace-name> <pod-name>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Applying YAML Files
|
||||
|
||||
- **Apply configuration from a YAML file to a specific namespace**
|
||||
|
||||
```bash
|
||||
kubectl apply -f <yaml-file> -n <namespace-name>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Managing Nodes and Labels
|
||||
|
||||
- **Label a node with a custom key-value pair**
|
||||
|
||||
```bash
|
||||
kubectl label nodes <node-name> kubernetes.io/<label-key>=<label-value>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Viewing Cluster Resources
|
||||
|
||||
- **Display all resources loaded in a namespace**
|
||||
|
||||
```bash
|
||||
kubectl get all -n <namespace-name>
|
||||
```
|
||||
|
||||
- **Display replica sets, pods, and deployments in a specific namespace**
|
||||
|
||||
```bash
|
||||
kubectl get rs,pod,deployment -n <namespace-name>
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## ReplicaSet and Deployment Management
|
||||
|
||||
- **Scale a ReplicaSet**
|
||||
|
||||
```bash
|
||||
kubectl scale rs <replicaset-name> -n <namespace-name> --replicas=<count>
|
||||
```
|
||||
|
||||
- **View rollout history of a deployment**
|
||||
|
||||
```bash
|
||||
kubectl rollout history deployment -n <namespace-name> <deployment-name>
|
||||
```
|
||||
|
||||
- **View details of a specific revision in a deployment's rollout history**
|
||||
|
||||
```bash
|
||||
kubectl rollout history deployment -n <namespace-name> <deployment-name> --revision <number>
|
||||
```
|
||||
|
||||
- **Roll back a deployment to a specific revision**
|
||||
|
||||
```bash
|
||||
kubectl rollout undo deployment -n <namespace-name> <deployment-name> --to-revision=<number>
|
||||
```
|
||||
|
||||
> **Note:** The command for rolling back to a specific revision is `kubectl rollout undo` rather than using `--to-revision` with `kubectl rollout history`.
|
||||
|
||||
---
|
||||
|
||||
## Additional Information
|
||||
|
||||
- **Static Manifest Files**
|
||||
|
||||
All YAML files located under `/etc/kubernetes/manifests/` are automatically loaded after a server reboot.
|
||||
|
||||
---
|
||||
|
||||
56
Databases/Postgresql/install.md
Normal file
56
Databases/Postgresql/install.md
Normal file
@@ -0,0 +1,56 @@
|
||||
# PostgreSQL Installation and Configuration Guide
|
||||
|
||||
Follow these steps to install and configure PostgreSQL on your system:
|
||||
|
||||
## Step 1: Update System Packages
|
||||
Ensure your system's package list is up-to-date:
|
||||
|
||||
```bash
|
||||
sudo apt update
|
||||
```
|
||||
|
||||
## Step 2: Install PostgreSQL
|
||||
Install PostgreSQL and its additional utilities:
|
||||
|
||||
```bash
|
||||
sudo apt install postgresql postgresql-contrib
|
||||
```
|
||||
|
||||
## Step 3: Start PostgreSQL Service
|
||||
Start the PostgreSQL service:
|
||||
|
||||
```bash
|
||||
sudo systemctl start postgresql.service
|
||||
```
|
||||
|
||||
## Step 4: Enable PostgreSQL to Start on Boot
|
||||
Enable the PostgreSQL service to start automatically on system boot:
|
||||
|
||||
```bash
|
||||
sudo systemctl enable postgresql.service
|
||||
```
|
||||
|
||||
## Step 5: Switch to the PostgreSQL User
|
||||
Switch to the `postgres` system user to perform database administration tasks:
|
||||
|
||||
```bash
|
||||
sudo -i -u postgres
|
||||
```
|
||||
|
||||
## Step 6: Access the PostgreSQL Command-Line Interface
|
||||
Start the `psql` command-line interface:
|
||||
|
||||
```bash
|
||||
psql
|
||||
```
|
||||
|
||||
## Step 7: Configure PostgreSQL
|
||||
Edit the PostgreSQL configuration file:
|
||||
|
||||
```bash
|
||||
vim /etc/postgresql/14/main/postgresql.conf
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
**Note:** Replace `14` in the file path above with your PostgreSQL version number, if it's different.
|
||||
Reference in New Issue
Block a user