Kadalu Storage Management - Moana

Install (Server, Node agent and CLI)

Download the latest release with the command

curl -L https://github.com/kadalu/moana/releases/download/0.2.0/kadalu-server-`uname -m | sed 's|aarch64|arm64|' | sed 's|x86_64|amd64|'` -o kadalu-server
curl -L https://github.com/kadalu/moana/releases/download/0.2.0/kadalu-node-`uname -m | sed 's|aarch64|arm64|' | sed 's|x86_64|amd64|'` -o kadalu-node
curl -L https://github.com/kadalu/moana/releases/download/0.2.0/kadalu-`uname -m | sed 's|aarch64|arm64|' | sed 's|x86_64|amd64|'` -o kadalu

Make the kadalu-server, kadalu-node and kadalu as binary executable.

chmod +x ./kadalu-server
chmod +x ./kadalu-node
chmod +x ./kadalu

Move the binaries into your PATH.

sudo mv ./kadalu-server ./kadalu-node ./kadalu /usr/local/bin/

Usage:

Start the Kadalu Management Server(in any one server or cloud)

$ kadalu-server

Start the node agent in all Storage nodes.

$ # Create Required directories in the node
$ mkdir -p /var/lib/kadalu \
    /var/run/kadalu \
    /var/lib/kadalu/volfiles \
    /var/log/kadalu
$ # Copy Systemd unit template file
$ cp extra/kadalu-brick@.service /lib/systemd/system/
$ # Copy glusterfsd wrapper script
$ cp extra/kadalu-brick /usr/sbin/
$ # Start the Node agent
$ sudo kadalu-node

If glusterfsd is installed in different directory than /usr/sbin then import the environment variable as below.

$ systemctl set-environment GLUSTERFSD=/usr/local/sbin/glusterfsd

Run CLI from any node.

$ export KADALU_MGMT_SERVER=<kadalu-server-url>
$ kadalu cluster list

Register an User

$ # kadalu register <name> <email>
$ kadalu register Admin admin@example.com
Enter password:
User registered successfully.
ID: efe3b67e-7444-4857-8454-1a44fde7fa43

Once registered, login to Kadalu Server by running,

$ # kadalu login <email>
$ kadalu login admin@example.com
Enter password:
Successfully logged in to Kadalu Storage Server.
App ID: 9794c22e-5003-47cd-af1d-883e4b2625ad

Token saved to `~/.kadalu/app.json` Run `kadalu logout` to logout from the Server or delete the `~/.kadalu/app.json` file.

Create and view the Cluster

After login to Kadalu Server, create and manage Clusters.

$ kadalu cluster create mycluster
Cluster created successfully.
ID: 230da85c-82fd-43a1-a517-fd6d67bce827

Saved as default Cluster

$ kadalu cluster list
 ID                                    Name
*230da85c-82fd-43a1-a517-fd6d67bce827  mycluster

The user who creates the Cluster will become admin for that Cluster.

Request a node to join the Cluster

Run the below command from where the Node endpoint is reachable. It can be run from the node itself or one of the node from where the endpoint is reachable.

$ # kadalu node join <endpoint>
$ kadalu node join http://node1.example.com:3001
Node joined successfully.
ID: 894de25c-70b2-48c5-8c18-188440d3953a

$ kadalu node list
ID                                    Name                       Endpoint
894de25c-70b2-48c5-8c18-188440d3953a  node1.example.com          http://node1.example.com:3001

Note: The endpoint should be reachable from CLI and also for other nodes of the Cluster.

Create a Volume

$ mkdir /bricks
$ kadalu volume create gvol1 node1.example.com:/bricks/b1
Volume creation request sent successfully.
Task ID: 0f8ea18a-bbd2-403a-b752-ea3fce74e8c6

Volume create request will be handled by Kadalu Storage Task framework, respective node agent will pick up the Volume create task and internally sends Volume create request to all participating nodes. Node agent will also update the Task status to Kadalu Management Server. States of each task are:

Queued - When assigned to a node, but Task is not yet picked up.
Received - Task is received by the Node and execution is pending
Completed/Failed - Task is complete or failed.

Check the state of the task using,

$ kadalu task list
Task ID                               State       Assigned To                            Type
0f8ea18a-bbd2-403a-b752-ea3fce74e8c6  Completed   894de25c-70b2-48c5-8c18-188440d3953a   volume_create

Once the task is complete, Volume list will show the Volume details

$ kadalu volume list
ID                                    Name            Type            State
97a7546b-5ab5-45b0-9861-acd9b6097519  gvol1           Distribute      Created

Start the Volume

Start the newly created Volume using the following command.

$ kadalu volume start gvol1
Volume start request sent successfully.
Task ID: 8ef44ebe-12ea-4bf2-b608-9d3cffb8d84a

Check the Task status using,

$ kadalu task list
Task ID                               State       Assigned To           Type
8ef44ebe-12ea-4bf2-b608-9d3cffb8d84a  Completed   node1.example.com     volume_start

Mount the Volume

Mount script will be introduced soon to automatically download the Volfile and mount. Now use volfile get command to download the Volfile and then mount the Volume using glusterfs command.

$ kadalu volfile get client -v 97a7546b-5ab5-45b0-9861-acd9b6097519 -o /root/gvol1.vol
Volfile downloaded successfully. Volfile saved to /root/gvol1.vol

Run glusterfs command using the above downloaded Volfile.

$ mkdir /mnt/gvol1
$ glusterfs --process-name fuse -l /var/log/kadalu/gvol1.log --volfile-id gvol1 -f /root/gvol1.vol /mnt/gvol1

Check if the mount is successful.

$ df /mnt/gvol1
Filesystem                          Size   Used Avail Use%   Mounted on
/tmp/gvol1.vol                      10.7G  5.0G 5.7G  46.72% /mnt/gvol1

Hello World

Create a file from the mount and verify that the file is created in both Mount and backend brick.

$ echo "Hello World" > /mnt/gvol1/f1
$ cat /mnt/gvol1/f1
Hello World
$ cat /bricks/b1/f1
Hello World

amarts / moana-1