This Vagrantfile bootstraps a fresh virtualized cluster with:
- minimum two VM under Debian
- watchdog enabled on all nodes
- one PostgreSQL instance
- one shared storage for PostgreSQL data and Storage Based Death
- one vIP moving with the PostgreSQL instance
- one dummy service avoiding to colocate with PostgreSQL, just for fun and demo
This has been developed and tested using:
- vagrant 2.2.14
- vagrant-libvirt 0.5.3
- Debian 11 bullseye as VM OS (vagrant box
debian/bullseye64) - Pacemaker 2.0.5
- pcs 0.10.8
You need vagrant and vagrant-libvirt.
apt install make vagrant vagrant-libvirt libvirt-clients # for Debian-like
yum install make vagrant vagrant-libvirt libvirt-client # for RH-like
dnf install make vagrant vagrant-libvirt libvirt-client # for recent RH-like
systemctl enable --now libvirtd
Alternatively, you can install vagrant-libvirt using:
apt install libvirt-dev ruby-dev
vagrant plugin install vagrant-libvirt
To create the cluster, run:
cd vagrant-patroni
make all
After some minutes and tons of log messages, you can connect to your servers using eg.:
vagrant ssh srv1
Play with the cluster!
srv1> sudo -i
srv1# pcs resource
srv1# crm_mon -1D
srv1# crm_mon -1Dn
srv1# # move the resource away (and clear the temp constraint)
srv1# pcs resource move pgsqlgroup --wait
srv1# pcs resource clear pgsqlgroup --wait
srv1# # Kill the node hosting pgsql.
srv1# # Open crm_mon in another term to observe the reaction
srv1# pcs stonith fence srv2
srv1# crm_mon -frAno
srv1# # after the reboot of srv2 node, start the cluster on the node
srv1# pcs cluster start srv2Copy vagrant.yml-dist as vagrant.yml read comments and edit as needed.
To destroy your cluster, run:
make clean
Find all existing VM created by vagrant on your system:
vagrant global-status