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Update dockerfiles #515
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tilk
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kuznia-rdzeni:master
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lekcyjna123:lekcyjna/update-dockerfiles-19112023
Dec 1, 2023
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Update dockerfiles #515
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Regarding your comment #513 (comment) and this change - I don't think that running
apt-get
only in the firstRUN
is that better. Opposite has its benefits - if I wanted to add another tool like spike, with its dependencies I only created next layer that is entirely dedicated to the tool. I didn't modify previous layers, so I didn't need to rebuild the entire container (cached versions of first two steps were used) or upload first two layers again. I would be for this option, as it is useful for updating and developing containers.Are there some benefits of installing everything in first step, that I am missing?
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There is a benefit that you don't call
apt update
multiple times, so you generate lower traffic for Debian servers.There was a problem hiding this comment.
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But on the other hand, when your are adding new tool with new package dependencies as a new step, instead of installing all of the packages again at rebuild, you use cached previous docker layers and only download the newly added packages, which creates even less traffic.
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Note that there is
rm -rf /var/lib/apt/lists/*
in the end of the command. This will make the resulting docker image smaller (by noticeable amount), as all the files that we are going to delete will be ephemeral (and won't exist in the resulting image). If we split that into twoRUN
instructions, the contents of/var/lib/apt/lists/
would be saved as part of the first layer (each instruction is a new layer).