This is a docker-compose based repository to test and play with the replication manager of postgresql. It consists in a pg-node service defined inside the docker-compose.yml file. Using the image generated from postgres.Dockerfile, which includes the file entrypoint.sh as its entrypoint. And where it is defined the main bootstrap configuration.
A local file named cluster_members is used to let the containers know their names eachother and bootstrap the replication cluster. The first container that brings up will take the role of replication master and the rest replicas.
There is a Makefile with the main tasks used in this playground; like: up, add-node, del-node, status and clean. There is another make target named ssh that will run the script share-keys.sh which will exchange all the public keys between all the different nodes. And a help target to show a small description of all the targets available.
Use make help to see this message.
repmgr: run repmgr commands with the form of `make repmgr CMD=""`
status: display information about each registered node in the replication cluster
daemon-status: display information about the status of repmgrd on each node in the cluster
crosscheck: cross-checks connections between each combination of nodes
cluster-cleanup: purge monitoring history
build: build postgresql node image
up: create and start a single node (usually the first one)
clean: stop and delete all the nodes and current deploy
logs: tail logs of all nodes
ssh: share ssh public keys between each node
add-node: add another node to the cluster
del-node: delete one node from the cluster