Deploy apps over a cluster possible? (Unite Multiple CASAOS Under one GUI)

[armisis]

Greetings I now have 2 Zimaboards and a stack of 9 Raspberry PI 5 and two raspberry pi 4, all of which are running CASAOS, I would love to be able to unify them in one web gui and use them as a unified docker swarm that as I add more devices with casaos that I can add them to the swarm/UI.

Is this doable?

Thoughts?

Thanks!

Armisis

[dagelf]

I would suggest to rename your issue: "Deploy apps over a cluster possible?"

[tigerinus]

CasaOS was designed to support this - that's why we insist on HTTP based API instead of UNIX Domain Socket, so services like AppManagement could be controlled remotely.

However, there is just a lack of resource in moving toward this direction. Would love to see 3rd party projects from this community to manage multiple CasaOS instances across a cluster.

[armisis]

I would love to help best I can in my free time, I am not a coder (I'm ok at scripting to a degree.) but I would be happy to help test things our on my home lab cluster to give it a more useful purpose best I can. If I can be of help for the CASAOS system development I will be. Its been a long time I am a former beta tester for the old now defunct Mandrake Linux distro.

[armisis]

To create a module for CasaOS that sets up and utilizes a Docker Swarm for load balancing and optimization, we need to:

1. Understand CasaOS Architecture: Familiarize ourselves with CasaOS, its policies, procedures, and the programming languages it uses.
2. Docker Swarm Setup: Implement Docker Swarm initialization and management within CasaOS.
3. Integration with CasaOS: Ensure that the module integrates seamlessly with existing CasaOS functionality, following its architecture and guidelines.
4. Node Management: Provide an easy way to add new nodes to the swarm.
5. Service Management: Ensure all applications utilize the Docker Swarm.

Here is a high-level plan and the necessary steps to create the module:

1. Understand CasaOS and Its Architecture

CasaOS is a simple, open-source home server OS. It is designed to be easy to use and deploy, with support for various applications through Docker containers. The core components and typical file structure of CasaOS need to be reviewed to ensure compatibility.

2. Docker Swarm Setup

Docker Swarm is a native clustering and scheduling tool for Docker containers. It turns a pool of Docker hosts into a single, virtual Docker host. Below are the steps to initialize and manage a Docker Swarm:

• Initialize the Swarm.
• Add nodes to the Swarm.
• Deploy services on the Swarm.

3. Integration with CasaOS

Ensure that the module integrates with CasaOS's existing functionality. This involves understanding how CasaOS handles Docker containers and aligning our implementation with its processes.

4. Node Management

Provide a straightforward interface to add new nodes to the Swarm. This can be done through scripts or a web interface, depending on how CasaOS handles user interactions.

5. Service Management

Ensure that all Docker services (applications) are deployed using the Swarm. This involves modifying deployment scripts to use Docker Swarm commands.

Implementation Steps

Step 1: Initialize Docker Swarm

Create a script to initialize the Docker Swarm.

#!/bin/bash

# Initialize Docker Swarm
docker swarm init

# Output the join token to add worker nodes
docker swarm join-token worker -q > /mnt/data/swarm_worker_token.txt

Step 2: Add Nodes to the Swarm

Create a script to add new nodes to the Swarm.

#!/bin/bash

# Get the join token from the manager node
SWARM_JOIN_TOKEN=$(cat /mnt/data/swarm_worker_token.txt)

# Join the node to the Swarm
docker swarm join --token $SWARM_JOIN_TOKEN <manager-ip>:2377

Step 3: Deploy Services on the Swarm

Modify existing deployment scripts to use docker service commands instead of docker run.

Example:

#!/bin/bash

# Create a Docker service
docker service create --name <service-name> --replicas 3 <image-name>

Step 4: Integrate with CasaOS

Modify the CasaOS source code to call these scripts during the initialization and management of Docker containers.

// Example Go code to call the initialization script
package main

import (
    "os/exec"
    "log"
)

func initSwarm() {
    cmd := exec.Command("/path/to/init-swarm.sh")
    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }
}

func addNode() {
    cmd := exec.Command("/path/to/add-node.sh")
    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }
}

func main() {
    initSwarm()
    // Add more logic as needed
}

File Structure

CasaOS/
|-- scripts/
|   |-- init-swarm.sh
|   |-- add-node.sh
|-- main.go
|-- Dockerfile

Summary

1. Scripts:
   • init-swarm.sh: Initializes the Docker Swarm and outputs the worker join token.
   • add-node.sh: Adds a new node to the Swarm using the join token.
2. Integration:
   • Modify CasaOS source code to call these scripts during initialization and node addition.
3. Service Deployment:
   • Modify deployment scripts to use Docker Swarm services.

These scripts and modifications should be in line with CasaOS policies and procedures. Ensure to test thoroughly in a development environment before submitting to the developers.

The above scripts and instructions are just a starting point. Depending on the actual implementation details of CasaOS, further refinements might be necessary.

Is this the kind of starting point that may be needed?