etcd3-install example shows how to use matchbox to network boot and provision 3-node etcd3 cluster on bare-metal in an automated way.
Follow the getting started tutorial to learn about matchbox and set up an environment that meets the requirements:
If you prefer to provision QEMU/KVM VMs on your local Linux machine, set up the matchbox development environment.
sudo ./scripts/devnet create
Clone the matchbox project and take a look at the cluster examples.
$ git clone https://github.com/coreos/matchbox.git $ cd matchbox/examples/terraform/etcd3-install
terraform.tfvars.example file to
provider.tf references your matchbox credentials.
matchbox_http_endpoint = "http://matchbox.example.com:8080" matchbox_rpc_endpoint = "matchbox.example.com:8081" ssh_authorized_key = "ADD ME"
etcd3-install configure the matchbox provider, define profiles (e.g.
etcd3), and define 3 groups which match machines by MAC address to a profile. These resources declare that the machines should PXE boot, install Container Linux to disk, and provision themselves into peers in a 3-node etcd3 cluster.
cached-container-linux-install profile will PXE boot and install Container Linux from matchbox assets. If you have not populated the assets cache, use the
container-linux-install profile to use public images (slower).
You may set certain optional variables to override defaults.
# install_disk = "/dev/sda" # container_linux_oem = ""
$ terraform get
Plan and apply to create the resoures on Matchbox.
$ terraform plan Plan: 10 to add, 0 to change, 0 to destroy. $ terraform apply Apply complete! Resources: 10 added, 0 changed, 0 destroyed.
Power on each machine (with PXE boot device on next boot). Machines should network boot, install Container Linux to disk, reboot, and provision themselves as a 3-node etcd3 cluster.
$ ipmitool -H node1.example.com -U USER -P PASS chassis bootdev pxe $ ipmitool -H node1.example.com -U USER -P PASS power on
For local QEMU/KVM development, create the QEMU/KVM VMs.
$ sudo ./scripts/libvirt create $ sudo ./scripts/libvirt [start|reboot|shutdown|poweroff|destroy]
Verify each node is running etcd3 (i.e. etcd-member.service).
$ ssh email@example.com $ systemctl status etcd-member
Verify that etcd3 peers are healthy and communicating.
$ etcdctl cluster-health $ etcdctl set /message hello $ etcdctl get /message