zulip/scripts/setup/create-database

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#!/usr/bin/env bash
set -e
if [ "$EUID" -ne 0 ]; then
echo "Error: This script must be run as root" >&2
exit 1
fi
set -x
# What user should we use for connecting to the database
POSTGRES_USER="${POSTGRES_USER:-postgres}"
# What database name and username to use when connecting to the database
DATABASE_NAME=$(crudini --get /etc/zulip/zulip.conf postgresql database_name 2>/dev/null || echo zulip)
DATABASE_USER=$(crudini --get /etc/zulip/zulip.conf postgresql database_user 2>/dev/null || echo zulip)
# This psql command may fail because the Zulip database doesnt exist,
# hence the &&.
if records="$(
cd / # Make sure the current working directory is readable by postgres
su "$POSTGRES_USER" -c "psql -v ON_ERROR_STOP=1 -Atc 'SELECT COUNT(*) FROM $DATABASE_NAME.zerver_message;' $DATABASE_USER"
)" && [ "$records" -gt 200 ]; then
set +x
echo "WARNING: This will delete your Zulip database which currently contains $records messages."
read -p "Do you want to proceed? [y/N] " -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
exit 1
fi
set -x
fi
# Shut down all services to ensure a quiescent state.
if [ -e "/var/run/supervisor.sock" ]; then
su zulip -c "$(dirname "$0")/../stop-server"
fi
# Drop any open connections to any old database.
# Send the script via stdin in case the postgres user lacks permission to read it.
su -s /usr/bin/env - -- "$POSTGRES_USER" \
bash -s - zulip zulip_base <"$(dirname "$0")/terminate-psql-sessions"
(
cd / # Make sure the current working directory is readable by postgres
su "$POSTGRES_USER" -c "psql -v ON_ERROR_STOP=1 -v dbname=$DATABASE_NAME -v dbuser=$DATABASE_USER -e"
) <"$(dirname "$0")/create-db.sql"
# Set a postgres password if the postgres username is not "zulip".
# When the username is zulip, we rely on running as the zulip system
# user for authentication via postgres' peer authentication.
if [ "$DATABASE_USER" != "zulip" ]; then
PASSWORD=$(crudini --get /etc/zulip/zulip-secrets.conf secrets postgres_password)
su "$POSTGRES_USER" -c "psql -v ON_ERROR_STOP=1 -e postgres" <<EOF
ALTER ROLE $DATABASE_USER PASSWORD '$PASSWORD';
EOF
fi
# Clear memcached to avoid contamination from previous database state
"$(dirname "$0")/flush-memcached"
echo "Database created"