docteurklein / postgres-logical-scale

postgres docker image that allows logical replication scaling

postgres-logical-scale

what ?

A logical-replication-ready postgres@10beta2 docker image.

how ?

build a custom image

docker build \
    --build-arg PG_USER=florian \
    --build-arg PG_PASSWORD=test \
    --build-arg PG_DB=test \
    -t pg10 .

create the primary

docker volume create pgmaster

docker service create --name pgmaster \
    -e IS_MASTER=1 \
    -v pgmaster:/var/lib/data/postgres \
    pg10

create a replica

docker service create --name pgreplica \
    -e MASTER_HOST=pgmaster \
    -e PG_USER=florian -e PG_PASSWORD=test -e PG_DB=test \
    pg10

scale it!

docker service scale pgreplica=10