Grafana upgrade

grafana_upgrade.sh

# first, backup running config
docker exec -it -u 0 grafana bash
cat /etc/grafana/grafana.ini
# copy output and paste to backup file somewhere or use docker cp
docker cp grafana:/etc/grafana/grafana.ini grafana.ini.bak

docker pull grafana/grafana:latest
docker stop grafana
docker rm grafana
docker run --name grafana --detach=true --publish 80:3000 --link graphite:graphite --volumes-from grafana-storage grafana/grafana

# copy updated and adjusted grafana.ini to running container and restart it
docker cp grafana.ini.updated grafana:/etc/grafana/grafana.ini
docker restart grafana