Advanced configurations

Now it's time to explore more advanced configurations that you can use to configure your K3s cluster on the edge.

Using external MySQL storage for K3s

K3s supports MySQL and SQLite, instead of etcd as a data storage for your K3s cluster information. You can install MySQL in another node, a cloud instance, or a managed service on the cloud such as AWS Aurora or Google CloudSQL. For example, let's attempt it with a cloud instance using Digital Ocean. However, you can do it on any cloud that you wish. So, let's get started with the following steps:

1. Log in to your cloud instance:

   $ ssh root@IP_DATASTORE

2. Install Docker with the following commands:

   $ apt-get update
   $ apt-get install docker.io -y
   $ docker run -d --name mysql -e MYSQL_ROOT_PASSWORD=k3s123- \
   -e MYSQL_DATABASE="k8s" -e MYSQL_USER="k3sadm" \
   -e MYSQL_PASSWORD="k3s456-" \
   -p 3306:3306 \
   -v /opt/mysql:/var/lib/mysql \
   mysql:5.7

3. Log out using the following command...