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Add ability to specify Master/Slave and auto fetch-backups if slave #3

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42 changes: 33 additions & 9 deletions setup-wale.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -16,19 +16,43 @@ else
umask u=rwx,g=rx,o=
mkdir -p /etc/wal-e.d/env

echo "$AWS_SECRET_ACCESS_KEY" > /etc/wal-e.d/env/AWS_SECRET_ACCESS_KEY
echo "$AWS_ACCESS_KEY_ID" > /etc/wal-e.d/env/AWS_ACCESS_KEY_ID
echo "$AWS_SECRET_ACCESS_KEY" > /etc/wal-e.d/env/AWS_SECRET_ACCESS_KEY
echo "$WALE_S3_PREFIX" > /etc/wal-e.d/env/WALE_S3_PREFIX
chown -R root:postgres /etc/wal-e.d

# wal-e specific
echo "wal_level = archive" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_mode = on" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_command = 'envdir /etc/wal-e.d/env /usr/local/bin/wal-e wal-push %p'" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_timeout = 60" >> /var/lib/postgresql/data/postgresql.conf
if [ "$POSTGRES_AUTHORITY" = "slave" ]
then
echo "Authority: Slave - Fetching latest backups";

# $PGDATA cannot be removed so use temporary dir
# If you don't stop the server first, you'll waste 5hrs debugging why your WALs aren't pulled
su - postgres -c "envdir /etc/wal-e.d/env /usr/local/bin/wal-e backup-fetch /tmp/pg-data LATEST"
gosu postgres pg_ctl -D "$PGDATA" -w stop
su - postgres -c "cp -rf /tmp/pg-data/* $PGDATA"
su - postgres -c "rm -rf /tmp/pg-data"

# Create recovery.conf
echo "standby_mode = 'yes'" >> $PGDATA/recovery.conf
echo "primary_conninfo = 'host=$POSTGRES_MASTER_HOST user=$POSTGRES_USER password=$POSTGRES_PASSWORD'" >> $PGDATA/recovery.conf
echo "restore_command = 'envdir /etc/wal-e.d/env wal-e wal-fetch "%f" "%p"'" >> $PGDATA/recovery.conf
echo "trigger_file = '$PGDATA/trigger'" >> $PGDATA/recovery.conf

chown -R postgres "$PGDATA"

# Starting server again to satisfy init script
gosu postgres pg_ctl -D "$PGDATA" -o "-c listen_addresses=''" -w start
else
echo "Authority: Master - Scheduling WAL backups";

echo "wal_level = archive" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_mode = on" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_command = 'envdir /etc/wal-e.d/env /usr/local/bin/wal-e wal-push %p'" >> /var/lib/postgresql/data/postgresql.conf
echo "archive_timeout = 60" >> /var/lib/postgresql/data/postgresql.conf

su - postgres -c "crontab -l | { cat; echo \"0 3 * * * /usr/bin/envdir /etc/wal-e.d/env /usr/local/bin/wal-e backup-push /var/lib/postgresql/data\"; } | crontab -"
su - postgres -c "crontab -l | { cat; echo \"0 4 * * * /usr/bin/envdir /etc/wal-e.d/env /usr/local/bin/wal-e delete --confirm retain 7\"; } | crontab -"
su - postgres -c "crontab -l | { cat; echo \"0 3 * * * /usr/bin/envdir /etc/wal-e.d/env /usr/local/bin/wal-e backup-push /var/lib/postgresql/data\"; } | crontab -"
su - postgres -c "crontab -l | { cat; echo \"0 4 * * * /usr/bin/envdir /etc/wal-e.d/env /usr/local/bin/wal-e delete --confirm retain 7\"; } | crontab -"
fi
fi
fi
fi
fi