This is a docker compose repository to build and orchestrate a GPDB 7X multinode cluster for dev testing. This can be useful when there is a need to have multiple hosts and the single-node gpdemo cluster is insufficient. The docker compose GPDB 7 cluster is ephemeral so the cluster can be discarded and rebuilt for quick and clean testing. The OS of choice here is CentOS 7.
We need to build a local docker image that will be used for each container in the multinode cluster. The image here is specifically designed to work for GPDB 7 compilation and running the cluster.
pushd ./build/
docker build -t gpdb7-multinode-cluster/gpdb-image .
popd
Note: You only have to build the image once (unless there is an update to the build directory). The image is stored locally.
The docker-compose.yaml uses two environment variables:
$GPDB7_SRC(the path to your GPDB 7X source code)
Example:
export GPDB7_SRC=/Users/jyih/workspace/gpdb7
Note: The $GPDB7_SRC path will be mounted and used for compilation
so it would be good to run git clean -xfd in the directory to rid of
anything (e.g. MacOS compiled binaries).
$PWD(the path to the top-level dir of this repository) Note: You have to rundocker-composein the top-level dir anyways so$PWDshould always be correct.
This step will create the GPDB hosts (3 containers), build a network bridge between the 3 containers, and mount a shared volume (the GPDB 7 source code and some orchestration scripts from this repository).
# In this repository's top-level dir
docker-compose up -d
This step will install the compiled GPDB 7 onto each host and run gpinitsystem to create the GPDB 7X cluster.
pushd ./scripts/
bash coordinate-everything.sh
popd
Afterwards, you'll be able to connect to the coordinator node and start your testing.
docker exec -it gpdb7-docker-compose_cdw_1 /bin/bash
su - gpadmin
source env.sh
This step will destroy everything we've created. Run this when you no longer need the cluster.
# In this repository's top-level dir
docker-compose down -v