Ansible: ad-hoc commands
Ansible is not usefull only to run large complicated playbooks, its also usefull when you want to run simple commands on group of servers.
Konstantinos Patronas
How to start with ansible
In this article i will show you how to install and configure ansible and how to run a basic playbook.
How to check if a port is open and you dont have telnet or nc installed
In some environments you might not be able to install telnet or nc to verify if a port is open, but still using standard linux commands…
Docker swarm: overlay network encryption and MTLS
To encrypt application data, add --opt encrypted when creating the overlay network. This enables IPSEC encryption at the level of the…
Docker content trust: how it works
Docket content trust is a security mechanism that allows only images with a specific sign to run to our docker environment. This ensures…
Docker networking explained
Docker utilizes n architecture called Container Network Model (CNM) to manage container networking.
rsync examples: how to resume your interrupted copy and how to copy over a third host
How to copy a file/directory from a host to another who can communicate only by a 3rd host (Jump Host)
Docker swarm and remote filesystems, an ssh fs example
Scenario: we have a swarm of 3 servers and a 4th server which will be our storage, a directory on this host that will be mounted over ssh
Docker: see images size and how to clean-up
Docker images takes space in filesystem, lets do a test to get a better understanding, create the following Dockerfile
Docker — bind mounts and volumes
If your application requires data persistence after the container have been deleted docker offer two options to store data, volumes and…