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ceph-vagrant-multi-node

Prerequisites

  • make
  • Vagrant (tested with 2.1.1)
  • Virtualbox
  • rsync
  • ssh-keygen

Hardware Requirements

  • Per Node (default 3 are started):
    • CPU: 1 Core
    • Memory: 1GB

Quickstart

To start with the defaults, 3x nodes, run the following:

Edit the Makefile and set the CEPH_RELEASE (for example nautilus)

$ make up -j 3

The -j3 will cause three VMs to be started in parallel to speed up the Ceph cluster creation.

$ make ssh-node1
$ ceph -s
TODO

Usage

Starting the environment

To start up the Vagrant Ceph multi node environment with the default of three nodes (not parallel) run:

$ make up

Faster (parallel) environment start

To start up 3 VMs in parallel run (-j flag does not control how many (worker) VMs are started, the NODE_COUNT variable is used for that):

$ NODE_COUNT=3 make up -j3

The flag -j CORES/THREADS allows yout to set how many VMs (Makefile targets) will be run at the same time. You can also use -j $(nproc) to start as many VMs as cores/threads you have in your machine. So to start up all VMs (three nodes) in parallel, you would add one to the chosen NODE_COUNT.

Show status of VMs

$ make status
node1                     not created (virtualbox)
node2                     not created (virtualbox)
node3                     not created (virtualbox)

Shutting down the environment

To destroy the Vagrant environment run:

$ make clean

Data inside VM

See the data/VM_NAME/ directories, where VM_NAME is for example node1.

Show make targets

$ make help
ceph-status                    Runs `ceph -s` inside the first node to return the Ceph cluster status.
clean-data                     Remove data (shared folders) and disks of all VMs (nodes).
clean-node-%                   Remove a node VM, where `%` is the number of the node.
clean-nodes                    Remove all node VMs.
clean                          Destroy node VMs, and delete data.
help                           Show this help menu.
init-ceph-cluster              Run the init-ceph-cluster.sh script to deploy the Ceph cluster (automatically done by `up` target).
reset-ceph-cluster             Run "Starting Over" commands to "reset" the Ceph cluster.
ssh-keygen                     Generate ssh key for `ceph-deploy` command used for the actual Ceph cluster deployment.
ssh-node-%                     SSH into a node VM, where `%` is the number of the node.
start-nodes                    Create and start all node VMs by utilizing the `node-X` target (automatically done by `up` target).
start-node-%                   Start node VM, where `%` is the number of the node.
status-node-%                  Show status of a node VM, where `%` is the number of the node.
status-nodes                   Show status of all node VMs.
stop-nodes                     Stop/Halt all node VMs.
stop-node-%                    Stop/Halt a node VM, where `%` is the number of the node.
stop                           Stop/Halt all nodes VMs.
up                             Start Ceph Vagrant multi-node cluster. Creates, starts and bootsup the node VMs.

Variables

Variable Name Default Value Description
BOX_IMAGE centos/7 Set the VMs box image to use.
DISK_COUNT 1 Set how many additional disks will be added to the VMs.
DISK_SIZE_GB 10 GB Size of additional disks added to the VMs.
NODE_COUNT 2 How many worker nodes should be spawned.
NODE_CPUS 1 Core How many CPU cores to use for each node VM.
NODE_MEMORY_SIZE_GB 1 GB Size of memory (in GB) to be allocated for each node VM.
CEPH_RBD_CREATE true If a pool named rbd for rbd should be created.
CEPH_RBD_POOL_PG 64 PGs Count of PGs to set for the rbd pool.
CEPH_RBD_POOL_SIZE 3 The size of the rbd pool (min_size is 1).