AWS Portal Migrations 2017 09 27

We used this opportunity to install chords_control on the AWS instances. In the future, the CloudFormation template will be modified to use chords_control right off the bat.

• Preparations:

  • On AWS, create an ec2 snapshot of the instance volume.
  • ssh into the portal, exec into chords_influxdb, and dump the influxdb database to a file. Use the command copied from bin/influxdb/export_influxdb_tsdata_file.sh. Exit chords_influxdb. Use docker cp ... to copy the dump file to ~ec2-user/. Then copy this file off of the AWS instance. (This process can be done from the portal configure interface, if the database is small enough).
  • From the portal website configure page, export the portal configuration.

• ssh into the portal, and become root. We will be working in /chords.

sudo -i

• Save and display the existing environment.

cp .env .env.save
cat .env

• Fetch chords_control.

curl -O -k https://raw.githubusercontent.com/NCAR/chords/master/chords_control

• Create a new configuration, inserting values from .env where appropriate. (Use openssl rand -hex 32 to generate a SECRET_KEY_BASE if necessary). Be sure to set the database retention to something reasonable. Choose a numbered version, rather than latest.

python chords_control --config

• Update the portal.

python chords_control --update

• Stop the portal.

service docker-compose-chords stop

• Restart the docker engine (for good measure).

service docker restart

• Start chords. Might get a complaint like Service "grafana" is using volume "/var/log/grafana" from the previous container.. In that case, just stop and start the chords service again.

service docker-compose-chords start

• Make sure that all 5 containers are running. Browse to the portal and check all functions.

docker ps

• Check disk space, then remove unneeded images. Prune docker containers and volumes. Check disk space. In normal circumstances, the system should be using about 4.8G.

df -h
docker images
docker rmi <id1> ... <idn>
docker system prune
docker volume prune
df -h