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Docker: Difference between revisions
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== Enabling the docker service == | == Enabling the docker service == | ||
Inside your <code>configuration.nix</code>: | Inside your <code>configuration.nix</code>: | ||
<syntaxHighlight lang= | <syntaxHighlight lang=nix> | ||
{ | { | ||
... | ... | ||
virtualisation.docker.enable = true; | virtualisation.docker.enable = true; | ||
... | |||
} | } | ||
</syntaxHighlight> | </syntaxHighlight> | ||
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Adding users to the <code>docker</code> group will provide them access to the socket: | Adding users to the <code>docker</code> group will provide them access to the socket: | ||
<syntaxHighlight lang= | <syntaxHighlight lang=nix> | ||
{ | { | ||
users.users.<myuser>.extraGroups = [ "docker" ]; | users.users.<myuser>.extraGroups = [ "docker" ]; | ||
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== Building a docker image with nixpkgs == | == Building a docker image with nixpkgs == | ||
There is [https://nixos.org/nixpkgs/manual/#sec-pkgs-dockerTools an entry for dockerTools in the nixpkgs manual ] for reference. | |||
There is [https://nixos.org/nixpkgs/manual/#sec-pkgs-dockerTools an entry for dockerTools in the nixpkgs manual] for reference. | |||
In the nixpkgs repo some [https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/docker/examples.nix examples] can be found. | In the nixpkgs repo some [https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/docker/examples.nix examples] can be found. | ||
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The <code>sha256</code> argument of the <code>dockerTools.pullImage</code> function is the checksum of the archive generated by Skopeo. Since the archive contains the name and the tag of the image, Skopeo arguments used to fetch the image have to be identical to those used by the <code>dockerTools.pullImage</code> function. | The <code>sha256</code> argument of the <code>dockerTools.pullImage</code> function is the checksum of the archive generated by Skopeo. Since the archive contains the name and the tag of the image, Skopeo arguments used to fetch the image have to be identical to those used by the <code>dockerTools.pullImage</code> function. | ||
For instance, the sha of the following image | For instance, the sha of the following image | ||
<syntaxHighlight lang= | <syntaxHighlight lang=nix> | ||
pkgs.dockerTools.pullImage{ | pkgs.dockerTools.pullImage{ | ||
imageName = "lnl7/nix"; | imageName = "lnl7/nix"; | ||
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can be manually generated with the following shell commands | can be manually generated with the following shell commands | ||
<syntaxHighlight> | |||
<syntaxHighlight lang=bash> | |||
skopeo copy docker://lnl7/nix@sha256:632268d5fd9ca87169c65353db99be8b4e2eb41833b626e09688f484222e860f docker-archive:///tmp/image.tgz:lnl7/nix:2.0 | |||
</syntaxHighlight> | |||
<syntaxHighlight lang=bash> | |||
nix-hash --base32 --flat --type sha256 /tmp/image.tgz | |||
</syntaxHighlight> | |||
<syntaxHighlight lang=shell> | |||
1x00ks05cz89k3wc460i03iyyjr7wlr28krk7znavfy2qx5a0hfd | 1x00ks05cz89k3wc460i03iyyjr7wlr28krk7znavfy2qx5a0hfd | ||
</syntaxHighlight> | </syntaxHighlight> | ||