faridtsl / clustershell-project

Administration of a distributed service cluster using Clustershell

clustershell-project

We need to add our superhost to the known hosts of all nodes using ssh to connect without requiring a password

Edit /etc/clustershell/groups to add a group (nodeset) in the following manner :

name_of_the_group: IP1, IP2, IP3

to execute a command from the commandline : clush -w @node_all "the command"

Setting up the project

• Run multiple VMs
• Start ssh in all VMs
• Configure the machines to connect automatically without password in the following manner :
  • In the server (admin of the cluster)

ssh-keygen -t rsa #run this command only once
ssh [IP] mkdir -p .ssh  #run this command for every VM
cat .ssh/id_rsa.pub | ssh [IP] 'cat >> .ssh/authorized_keys' #run this command for every VM

• Add the follow lines to the hosts file : /etc/hosts
  • ip hostname;for every VM

Exp :

192.168.1.1 test1
192.168.1.2 test2 

• Edit the file /etc/clustershell/groups:
  • name_of_the_group: hostname1, hostname2

Exp :

node_all:  test1, test2

• To test your appliance run :

clush -w @node_all "echo hi"

Interface architecture

├── Metaservices Handling
│   └── List Metaservices
│       ├── List Metaservices
│       ├── Show Metaservice Details
│       ├── Show Detailed Status
│       └── Show Status
└── Simple Service Handling
    ├── List Nodes
    │   └── List
    ├── List Services
    │   ├── Add Service
    │   └── Delete Service
    └── Manage Services
        ├── Start
        ├── Restart
        ├── Stop
        └── Status

TODO

• learn about usefull commands for services
• learn the pythonic way to interact with clustershell
• add an HMI
• add node from our program
• use the hosts file to give up IPs
• add colors
• add dependancy management