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feat: add arbitrary Docker image tarball example

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and associated subtest.

This tests the functionality of the newly-added
`services.<name>.image.tarball` parameter.
This commit is contained in:
Matt Schreiber 2020-01-27 14:20:11 -05:00 committed by Matt Schreiber
parent fc14ff7abf
commit d2fb84c6e0
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48
examples/custom-image/arion-compose.nix Normal file
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@ -0,0 +1,48 @@
{ pkgs, ... }:
let
webRoot = "/www";
webserverImage = pkgs.dockerTools.buildLayeredImage {
name = "a-webserver";
config = {
Entrypoint = [
"${pkgs.darkhttpd}/bin/darkhttpd"
webRoot
];
Volumes = {
"${webRoot}" = { };
};
};
};
in
{
project.name = "custom-image";
services = {
webserver = {
image.tarball = webserverImage;
# The following is essentially equivalent to
#
# { image.tarball = webserverImage; }
#
# It is included here as a demonstration of how to configure Arion to
# load a Docker image from *any* valid image tarball, not just one
# produced with a `pkgs.dockerTools` builder function.
#image.tarball = webserverImage.outPath;
#image.name = webserverImage.imageName;
#image.tag = webserverImage.imageTag;
service.command = [ "--port" "8000" ];
service.ports = [
"8000:8000" # host:container
];
service.volumes = [
"${pkgs.nix.doc}/share/doc/nix/manual:${webRoot}"
];
};
};
}

6
examples/custom-image/arion-pkgs.nix Normal file
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@ -0,0 +1,6 @@
# Instead of pinning Nixpkgs, we can opt to use the one in NIX_PATH
import <nixpkgs> {
# We specify the architecture explicitly. Use a Linux remote builder when
# calling arion from other platforms.
system = "x86_64-linux";
}

13
tests/arion-test/default.nix
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@ -39,6 +39,7 @@ in
# Pre-build the image because we don't want to build the world
# in the vm.
(preEval [ ../../examples/minimal/arion-compose.nix ]).config.out.dockerComposeYaml
(preEval [ ../../examples/custom-image/arion-compose.nix ]).config.out.dockerComposeYaml
(preEval [ ../../examples/full-nixos/arion-compose.nix ]).config.out.dockerComposeYaml
(preEval [ ../../examples/nixos-unit/arion-compose.nix ]).config.out.dockerComposeYaml
(preEval [ ../../examples/traefik/arion-compose.nix ]).config.out.dockerComposeYaml
@ -66,6 +67,18 @@ in
)
machine.wait_until_fails("curl --fail localhost:8000")
# Tests
# - examples/custom-image
with subtest("custom-image"):
machine.succeed(
"rm -rf work && cp -frT ${../../examples/custom-image} work && cd work && NIX_PATH=nixpkgs='${pkgs.path}' arion up -d"
)
machine.wait_until_succeeds("curl --fail localhost:8000")
machine.succeed(
"cd work && NIX_PATH=nixpkgs='${pkgs.path}' arion down"
)
machine.wait_until_fails("curl --fail localhost:8000")
# Tests
# - running same image again doesn't require a `docker load`
with subtest("docker load only once"):