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Title: NixOS Bento: now able to compare local and remote NixOS version |
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Author: Solène |
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Date: 06 September 2022 |
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Tags: bento nixos nix |
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Description: |
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# Bento |
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Project update: the report is now able to compare if the remote server |
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is using the NixOS version we built locally. This is possible as NixOS |
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builds are reproducible, I get the same result on the server and the |
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remote system. |
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The tool is getting in a better shape, the code received extra checks |
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in a lot of place. |
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A bit later (blog post update), I added the possibility to trigger the |
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update from the user. |
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Bento git project repository |
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# Listening to socket |
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With systemd it's possible to trigger a command upon connecting on a |
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socket, I made bento systemd service to listen on port TCP/51337, a |
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connection would start the service "bento-update.service", and display |
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the output to the TCP client. |
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This totally works in the web browser, it's now possible to create a |
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bookmark that just starts the update and give instant feedback about |
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the update process. This will be particularly useful in case of a |
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debug phone session to ask the remote person to trigger an update on |
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their side instead of waiting for a timer. |
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# Status display demo |
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It is now possible to differenciate the "not up to date" state into two |
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categories: |
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* the bento scripts were updated but not NixOS version change, this is |
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called "sync pending". Changes could be distributing the updating file |
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to give a new address for the remote server, so we can ensure they all |
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received it. |
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* the local NixOS version differs from the remote version, a rebuild is |
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required, thus it's called "rebuild pending" |
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The "sync pending" is very fast, it only need to copy the files, but |
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won't rebuild anything. |
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```text |
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machine local version remote version state … |
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------- --------- ----------- ------------- … |
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kikimora 996vw3r6 996vw3r6 π sync pending π© (build… |
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nas r7ips2c6 lvbajpc5 π rebuild pending π© (build… |
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t470 ih7vxijm ih7vxijm π up to date π … |
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x1 fcz1s2yp fcz1s2yp π up to date π … |
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``` |
