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· 3 min read
Hreniuc Cristian-Alexandru

MariaDB container​

I started the mariadb container like this:

version: "3"
name: "mariadb"
services:
  mariadb:
    image: mariadb:10.10.2
    container_name: mariadb_prod_1
    ports:
      - "3306:3306"
    volumes:
      - ./fs/mariadb/volume:/var/lib/mysql:rw
      - ./fs/mariadb/mysqld:/var/run/mysqld:rw
      - ./fs/mariadb/log:/var/log/mysql:rw
      - ./fs/mariadb/conf.d:/etc/mysql/conf.d:ro
    environment:
      MARIADB_MYSQL_LOCALHOST_USER: 1
      MARIADB_MYSQL_LOCALHOST_GRANTS: "RELOAD, PROCESS, LOCK TABLES, BINLOG MONITOR"
      MARIADB_ROOT_PASSWORD: password
    restart: always

Those folders are empty at startup, I used them to make the server data persistent and also because some were required by mariabackup.

Afterwards I created a script which is ran by a cronjob, the script creates a full backup using mariabackup and uploads the backup to S3 or back blaze using restic(restic detects which files are already up and it won't upload them again).

· One min read
Hreniuc Cristian-Alexandru

If we ever get to this, here are the steps we need to follow to restore the cluster from an existing snapshot, if you have no snapshot, you deserve it.

How to restore the complete RKE kluster​

Source

If you want to test this also do these steps:

# The cluster is running

kubectl apply -f https://k8s.io/examples/application/deployment.yaml

# Take snapshot

kubectl delete -f https://k8s.io/examples/application/deployment.yaml

kubectl get pot --all-namespaces

Now restore it:


# Stop rke2 on all servers(not agents)
systemctl stop rke2-server

# restore:
rke2 server \
  --cluster-reset \
  --etcd-s3 \
  --cluster-reset-restore-path=etcd-snapshot-master1-1637253000 \
  --etcd-s3-bucket=domain-com-contabo-rke \
  --etcd-s3-access-key="keyId" \
  --etcd-s3-secret-key="applicationKey"

After the restor is done:

systemctl enable rke2-server
systemctl start rke2-server

Afterwards, you will see the old data.

kubectl get pot --all-namespaces