April 2020 - openterprise.it

Running SQL query on database inside Docker container running on remote host

Published on 2020-04-15 Author admin

Single line command to run SQL query on database inside Docker container running on remote host: ssh root@tinkerboard -C 'docker exec -i nextcloud-mariadb mysql -u nextcloud -p -e "SELECT * FROM oc_bruteforce_attempts;" nextcloud'

CentOS 8 and Fedora 32 - make DNS working for Docker containers

Published on 2020-04-01 Author admin

In CentOS 8 and Fedora 32, by default DNS requests from Docker containers are being blocked by Firewalld. To make DNS working for Docker containers use below command (assuming that containers are using docker0 interface for networking): sudo firewall-cmd --zone=trusted --add-interface=docker0 --permanent sudo firewall-cmd --zone=trusted --add-interface=docker0