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Update docker-compose demo cluster (#980)

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1. Multi-stage build with an extensive cleanup of useless files and optional image compression
2. Start three-node etcd cluster
3. Start three-node Patroni cluster
4. One container with haproxy
5. All container names are prefixed with "demo-" and don't have suffixes
6. Decommission dev_patroni_cluster.sh script, docker-compose is now standard de-facto.
7. Provide more examples in the docker/README.md
This commit is contained in:
Alexander Kukushkin
2019-03-07 11:32:03 +01:00
committed by GitHub
parent e670122c80
commit f0990532dc
7 changed files with 358 additions and 318 deletions
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docker/entrypoint.sh
+44 -99
View File
@@ -1,115 +1,60 @@
#!/bin/bash
#!/bin/sh
function usage()
{
cat <<__EOF__
Usage: $0
if [ -f /a.tar.xz ]; then
echo "decompressing image..."
sudo tar xpJf /a.tar.xz -C / > /dev/null 2>&1
sudo rm /a.tar.xz
sudo ln -snf dash /bin/sh
fi
Options:
readonly PATRONI_SCOPE=${PATRONI_SCOPE:-batman}
PATRONI_NAMESPACE=${PATRONI_NAMESPACE:-/service}
readonly PATRONI_NAMESPACE=${PATRONI_NAMESPACE%/}
readonly DOCKER_IP=$(hostname --ip-address)
--etcd Do not run Patroni, run a standalone etcd
--confd Do not run Patroni, run a standalone confd
--zookeeper Do not run Patroni, run a standalone zookeeper
Examples:
$0 --etcd
$0 --confd
$0 --zookeeper
$0
__EOF__
}
DOCKER_IP=$(hostname --ip-address)
PATRONI_SCOPE=${PATRONI_SCOPE:-batman}
ETCD_ARGS="--data-dir /tmp/etcd.data -advertise-client-urls=http://${DOCKER_IP}:2379 -listen-client-urls=http://0.0.0.0:2379"
optspec=":vh-:"
while getopts "$optspec" optchar; do
case "${optchar}" in
-)
case "${OPTARG}" in
confd)
haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D
CONFD="confd -prefix=${PATRONI_NAMESPACE:-/service}/$PATRONI_SCOPE -interval=10 -backend"
if [ ! -z ${PATRONI_ZOOKEEPER_HOSTS} ]; then
while ! /usr/share/zookeeper/bin/zkCli.sh -server ${PATRONI_ZOOKEEPER_HOSTS} ls /; do
sleep 1
done
exec $CONFD zookeeper -node ${PATRONI_ZOOKEEPER_HOSTS}
else
while ! curl -s ${PATRONI_ETCD_URL}/v2/members | jq -r '.members[0].clientURLs[0]' | grep -q http; do
sleep 1
done
exec $CONFD etcd -node $PATRONI_ETCD_URL
fi
;;
etcd)
exec etcd $ETCD_ARGS
;;
zookeeper)
exec /usr/share/zookeeper/bin/zkServer.sh start-foreground
;;
cheat)
CHEAT=1
;;
help)
usage
exit 0
;;
*)
if [ "$OPTERR" = 1 ] && [ "${optspec:0:1}" != ":" ]; then
echo "Unknown option --${OPTARG}" >&2
fi
;;
esac;;
*)
if [ "$OPTERR" != 1 ] || [ "${optspec:0:1}" = ":" ]; then
echo "Non-option argument: '-${OPTARG}'" >&2
usage
exit 1
fi
;;
esac
done
case "$1" in
haproxy)
haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D
CONFD="confd -prefix=$PATRONI_NAMESPACE/$PATRONI_SCOPE -interval=10 -backend"
if [ ! -z "$PATRONI_ZOOKEEPER_HOSTS" ]; then
while ! /usr/share/zookeeper/bin/zkCli.sh -server $PATRONI_ZOOKEEPER_HOSTS ls /; do
sleep 1
done
exec dumb-init $CONFD zookeeper -node $PATRONI_ZOOKEEPER_HOSTS
else
while ! etcdctl cluster-health 2> /dev/null; do
sleep 1
done
exec dumb-init $CONFD etcd -node $(echo $ETCDCTL_ENDPOINTS | sed 's/,/ -node /g')
fi
;;
etcd)
exec "$@" -advertise-client-urls http://$DOCKER_IP:2379
;;
zookeeper)
exec /usr/share/zookeeper/bin/zkServer.sh start-foreground
;;
esac
## We start an etcd
if [[ -z ${PATRONI_ETCD_URL} && -z ${PATRONI_ZOOKEEPER_HOSTS} ]]; then
etcd $ETCD_ARGS > /var/log/etcd.log 2> /var/log/etcd.err &
if [ -z "$PATRONI_ETCD_HOSTS" ] && [ -z "$PATRONI_ZOOKEEPER_HOSTS" ]; then
export PATRONI_ETCD_URL="http://127.0.0.1:2379"
etcd --data-dir /tmp/etcd.data -advertise-client-urls=$PATRONI_ETCD_URL -listen-client-urls=http://0.0.0.0:2379 > /var/log/etcd.log 2> /var/log/etcd.err &
fi
export PATRONI_SCOPE
export PATRONI_NAME="${PATRONI_NAME:-${HOSTNAME}}"
export PATRONI_RESTAPI_CONNECT_ADDRESS="${DOCKER_IP}:8008"
export PATRONI_NAMESPACE
export PATRONI_NAME="${PATRONI_NAME:-$(hostname)}"
export PATRONI_RESTAPI_CONNECT_ADDRESS="$DOCKER_IP:8008"
export PATRONI_RESTAPI_LISTEN="0.0.0.0:8008"
export PATRONI_admin_PASSWORD="${PATRONI_admin_PASSWORD:=admin}"
export PATRONI_admin_PASSWORD="${PATRONI_admin_PASSWORD:-admin}"
export PATRONI_admin_OPTIONS="${PATRONI_admin_OPTIONS:-createdb, createrole}"
export PATRONI_POSTGRESQL_CONNECT_ADDRESS="${DOCKER_IP}:5432"
export PATRONI_POSTGRESQL_CONNECT_ADDRESS="$DOCKER_IP:5432"
export PATRONI_POSTGRESQL_LISTEN="0.0.0.0:5432"
export PATRONI_POSTGRESQL_DATA_DIR="data/${PATRONI_SCOPE}"
export PATRONI_POSTGRESQL_DATA_DIR="${PATRONI_POSTGRESQL_DATA_DIR:-$PGDATA}"
export PATRONI_REPLICATION_USERNAME="${PATRONI_REPLICATION_USERNAME:-replicator}"
export PATRONI_REPLICATION_PASSWORD="${PATRONI_REPLICATION_PASSWORD:-abcd}"
export PATRONI_REPLICATION_PASSWORD="${PATRONI_REPLICATION_PASSWORD:-replicate}"
export PATRONI_SUPERUSER_USERNAME="${PATRONI_SUPERUSER_USERNAME:-postgres}"
export PATRONI_SUPERUSER_PASSWORD="${PATRONI_SUPERUSER_PASSWORD:-postgres}"
export PATRONI_POSTGRESQL_PGPASS="$HOME/.pgpass"
cat > /patroni.yml <<__EOF__
bootstrap:
dcs:
postgresql:
use_pg_rewind: true
pg_hba:
- host all all 0.0.0.0/0 md5
- host replication replicator ${DOCKER_IP}/16 md5
__EOF__
mkdir -p "$HOME/.config/patroni"
[ -h "$HOME/.config/patroni/patronictl.yaml" ] || ln -s /patroni.yml "$HOME/.config/patroni/patronictl.yaml"
[ -z $CHEAT ] && exec python3 /patroni.py /patroni.yml
while true; do
sleep 60
done
exec python3 /patroni.py postgres0.yml