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Kivy Server

Quickly deploy changes

ssh root@kivy.org
cd ~/docker/kivy-server
git pull
docker-compose build
docker-compose up -d

Usage

These are some of the most common tasks that are performed by maintainers.

You can connect directly to the downloads container to maintain the directory served at https://kivy.org/downloads/.

ssh -p 2458 root@kivy.org
cd /web/downloads

Connect to the host to manage the server.

ssh root@kivy.org

Keep the host up to date.

apt-get update
apt-get dist-upgrade

The server repository is located at ~/docker/kivy-server. Secrets are kept in the .env folder, and they are referenced by services in docker-compose.yml and certain Dockerfiles.

cd ~/docker/kivy-server

Pull changes from GitHub.

git pull

Images and the containers created from them can be referenced by their service names.

# list services declared in `docker-compose.yml`
docker-compose config --services

Build the images.

# build new/changed images
docker-compose build
# build all images without using the cache
docker-compose build --no-cache
# build a specific image
docker-compose build nginx

Create containers from updated or new images and start all services. Use this command to deploy changes.

docker-compose up -d

Stop and remove containers and networks.

docker-compose down

Start existing containers.

docker-compose start
# start a specific container
docker-compose start nginx

Stop running containers.

docker-compose stop
# stop a specific container
docker-compose stop nginx

Inspect the logs.

# list logs for all containers
docker-compose logs
# follow logs for all containers
docker-compose logs -f
# follow logs for a specific container
docker-compose logs -f nginx
# follow logs starting from the last 100 lines
docker-compose logs -f --tail 100 nginx

Get a shell in a running container. If bash is not available in the container, use sh.

docker-compose exec docs bash

Start, stop and restart the Docker service.

service docker start
service docker stop
service docker restart

Add access for team member (do the following for both ssh -p 2458 root@kivy.org and ssh root@kivy.org)

# get public ssh key from them (`cat ~/.ssh/id_rsa.pub`)
# open keys in nano
nano ~/.ssh/authorized_keys
# in nano paste their key in a new line (should be something like `ssh-rsa AAAAB...iSTP username@hostname`)
# save in nano and exit

Remove access for team member (do the following for both ssh -p 2458 root@kivy.org and ssh root@kivy.org)

# open keys in nano
nano ~/.ssh/authorized_keys
# locate line with their key, delete it with ctrl-k
# save and exit

Add ssh key for CI to push to downloads and use it in the CI

On the download server:

# access download server
ssh -p 2458 root@kivy.org
# generate key for the service (e.g. github)
ssh-keygen -t ed25519 -C "kivy-repo@githubci" -q -N ""
# it prompts where to save it, give it unique name
Enter file in which to save the key (/root/.ssh/id_ed25519): /root/.ssh/id_ed25519_kivy_ghci
# copy the key
cat ~/.ssh/id_ed25519_kivy_ghci.pub
# and add it to the host's authorized_keys using nano
nano ~/.ssh/authorized_keys
# save nano

# copy the private key from terminal
cat ~/.ssh/id_ed25519_kivy_ghci

Now, go to repo of interest and paste the private key as a secrent variable (e.g. UBUNTU_UPLOAD_KEY). In the yml do:

env:
  UBUNTU_UPLOAD_KEY: ${{ secrets.UBUNTU_UPLOAD_KEY }}

And to use it do:

printf "%s" "$UBUNTU_UPLOAD_KEY" > ~/.ssh/id_rsa
chmod 600 ~/.ssh/id_rsa
echo -e "Host $1\n\tStrictHostKeyChecking no\n" >> ~/.ssh/config

Troubleshoot low disk space

Inspect disk space usage of the host.

df -h

Inspect disk space usage of Docker.

# overview
docker system df
# verbose
docker system df -v

Inspect a folder within a running container.

docker-compose exec downloads bash
# check directory size
du -h -s /web/downloads

Clear Docker data

Check out the docs to learn more about the commands listed below.

Remove stopped containers.

docker container prune

Remove images that are not used by existing containers.

docker image prune -a

Remove volumes that are not used by existing containers. WARNING! Persistent data is stored in volumes.

docker volume prune

Remove networks that are not used by existing containers.

docker network prune

Shortcut for all of the above.

docker system prune --volumes