Apache User Homepages Automatically – Salt Package-File-Service Example

These are example daemon configuration files for salt. Package-file-service is the most common way to configure daemons. If you’re new, start with salt master-slave installation and a commented example of SSH Server install.

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Pkg-File-Service – Control Daemons with Salt – Change SSH Server Port

You can control a huge number of daemons with a configuration management system. Package-file-service is the common pattern for this: install the software, replace a configuration file and finally restart the daemon to use the new configuration. This article shows … Continue reading

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Quick Fix for Useless Salt Warning – Add "file_ignore_glob: []" to /etc/salt/master

Some versions of Salt give you a useless warning on every run. The problem is easy to fix.

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Run Salt SLS File Locally – sudo salt-call –local state.apply foo

What if I just want to run a single SLS file (salt state) once? Save your state to /srv/salt/foo.sls and apply it $ sudo salt-call –local state.apply foo This masterless setup is just for quick testing. In production, you would use … Continue reading

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Salt Quickstart – Salt Stack Master and Slave on Ubuntu Linux

You can control a thousand computers with Salt. And this is how you install Salt. Slaves, the controlled computers, can be anywhere: behind an NAT, behind a firewall, on an unknown address. And still you can control them. Only the … Continue reading

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Aikataulu – Palvelinten hallinta ict4tn022 4-ti 5-ke 5 – loppukevät 2018 5p

Control 10 computers. Or 100. Or 1000. Just write what you want (idempotency). Control almost everything with one system (single source of truth). In plain text (infrastructure as code, versionable). My current research area is configuration management systems: I gave … Continue reading

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Message of the Day on Ubuntu – sudoedit /etc/motd; chmod ugo-x /etc/update-motd.d/*

Message of the Day (motd) is displayed when you log in with ssh. You can use plain text message of the day in /etc/motd also in Ubuntu. Disable scripts in /etc/update-motd.d/ to get rid of extra stuff. When automatically configuring … Continue reading

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200 Lines of Code Saves 20 000 EUR

My student Joram Puumala wrote a program to automatically configure routers. The CEO of NDC Networks, Markus Ahonen: “NDC is expecting to deliver over 5000 routers during 2018, so the calculable savings in direct effort are significant. Especially as handling … Continue reading

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Configuration Management Course Awards 2017: Most slaves: Tommi, most OSes: Matias

Tommi Timonen had the most slaves, a total of 1478 computers. He had 20 physical computers running many virtual computers each. Congratulations Tommi! Tommi also took second place with his previous setup of 639 computers. Third place was Tatu Erkinjuntti … Continue reading

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Top Configuration Management Systems – Puppet vs Salt vs Ansible vs Chef

The leading configuration management systems compared: Puppet, Chef, Ansible, Salt. My students Joona, Jori, Eero and Jarkko gave a presentation and demonstrated each system. ArcticCM provisioned and configured a couple of Linux desktops and servers, and also configured some Windows … Continue reading

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