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Tag: linux

How to set up 2 network isolated Docker containers (front and back-end)

6th August 2021 by Adrian Giacometti

Making this work might sound crazy, but if Docker has to be comparable in functionalities already provided by other types of virtualization, then this has to work right? Ok, this is the scenario, is a classic one: I need to deploy in one Docker host, 2 isolated containers, let’s say front-end and back-end. The Linux …

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How to configure 1 Linux host with 2 NICs and 2 Default Gateways

5th August 2021 by Adrian Giacometti

Historically, it was not possible to have 2 default gateways in a Linux host.  You can SEND traffic to both NICs, but the reply will always come from the NIC which has the default gateway. This will generate asymmetric traffic and it will be denied in the network or by the originating host. Asymmetric traffic …

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The power of simplicity applied to monitoring

26th July 2021 by Adrian Giacometti

Some time ago I was asked for help to develop a “simple and quick” Python script to monitor the status of a Linux service. They were in the middle of a deployment and they needed something fast. They added, keep the result in a JSON file with the date, serve the directory with HTTP for …

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