21a17b33f4
Fixes two launch script compatibility issues with other container runtimes (such as gvisor): * don't fail if /tmp already exists * don't fail if the environment becomes unset
104 lines
3.3 KiB
Nix
104 lines
3.3 KiB
Nix
# Copyright 2019 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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{ pkgs ? import <nixpkgs> { }
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, preLaunch ? ""
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, extraPackages ? [] }:
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with pkgs;
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rec {
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# Go implementation of the Nixery server which implements the
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# container registry interface.
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#
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# Users will usually not want to use this directly, instead see the
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# 'nixery' derivation below, which automatically includes runtime
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# data dependencies.
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nixery-server = callPackage ./server { };
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# Implementation of the image building & layering logic
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nixery-build-image = (import ./build-image {
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srcType = "path";
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srcArgs = <nixpkgs>;
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}).wrapper;
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# Use mdBook to build a static asset page which Nixery can then
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# serve. This is primarily used for the public instance at
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# nixery.dev.
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nixery-book = callPackage ./docs { };
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# Wrapper script running the Nixery server with the above two data
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# dependencies configured.
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#
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# In most cases, this will be the derivation a user wants if they
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# are installing Nixery directly.
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nixery-bin = writeShellScriptBin "nixery" ''
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export WEB_DIR="${nixery-book}"
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export PATH="${nixery-build-image}/bin:$PATH"
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exec ${nixery-server}/bin/nixery
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'';
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# Container image containing Nixery and Nix itself. This image can
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# be run on Kubernetes, published on AppEngine or whatever else is
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# desired.
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nixery-image = let
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# Wrapper script for the wrapper script (meta!) which configures
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# the container environment appropriately.
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#
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# Most importantly, sandboxing is disabled to avoid privilege
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# issues in containers.
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nixery-launch-script = writeShellScriptBin "nixery" ''
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set -e
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export PATH=${coreutils}/bin:$PATH
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export NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt
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mkdir -p /tmp
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# Create the build user/group required by Nix
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echo 'nixbld:x:30000:nixbld' >> /etc/group
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echo 'nixbld:x:30000:30000:nixbld:/tmp:/bin/bash' >> /etc/passwd
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echo 'root:x:0:0:root:/root:/bin/bash' >> /etc/passwd
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echo 'root:x:0:' >> /etc/group
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# Disable sandboxing to avoid running into privilege issues
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mkdir -p /etc/nix
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echo 'sandbox = false' >> /etc/nix/nix.conf
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# In some cases users building their own image might want to
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# customise something on the inside (e.g. set up an environment
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# for keys or whatever).
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#
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# This can be achieved by setting a 'preLaunch' script.
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${preLaunch}
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exec ${nixery-bin}/bin/nixery
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'';
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in dockerTools.buildLayeredImage {
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name = "nixery";
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config.Cmd = [ "${nixery-launch-script}/bin/nixery" ];
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maxLayers = 96;
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contents = [
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bashInteractive
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cacert
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coreutils
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git
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gnutar
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gzip
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iana-etc
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nix
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nixery-build-image
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nixery-launch-script
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openssh
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zlib
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] ++ extraPackages;
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};
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}
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