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nixpkgs/pkgs/applications/networking/cluster/ssm-agent/default.nix
Joe DeVivo bf92d0ec37 nixos/ssm-agent: conf files written to /etc
ssm-agent expects files in /etc/amazon/ssm. The pkg substitutes a location in
the nix store for those default files, but if we ever want to adjust this
configuration on NixOS, we'd need the ability to modify that file.

This change to the nixos module writes copies of the default files from the nix
store to /etc/amazon/ssm. Future versions can add config, but right now this
would allow users to at least write out a text value to
environment.etc."amazon/ssm/amazon-ssm-agent.json".text to provide
their own config.
2021-05-10 13:16:41 -07:00

129 lines
3.9 KiB
Nix

{ lib
, writeShellScriptBin
, buildGoPackage
, makeWrapper
, fetchFromGitHub
, coreutils
, nettools
, dmidecode
, util-linux
, bashInteractive
, overrideEtc ? true
}:
let
# Tests use lsb_release, so we mock it (the SSM agent used to not
# read from our /etc/os-release file, but now it does) because in
# reality, it won't (shouldn't) be used when active on a system with
# /etc/os-release. If it is, we fake the only two fields it cares about.
fake-lsb-release = writeShellScriptBin "lsb_release" ''
. /etc/os-release || true
case "$1" in
-i) echo "''${NAME:-unknown}";;
-r) echo "''${VERSION:-unknown}";;
esac
'';
in
buildGoPackage rec {
pname = "amazon-ssm-agent";
version = "3.0.755.0";
goPackagePath = "github.com/aws/${pname}";
nativeBuildInputs = [ makeWrapper ];
src = fetchFromGitHub {
rev = version;
owner = "aws";
repo = "amazon-ssm-agent";
hash = "sha256-yVQJL1MJ1JlAndlrXfEbNLQihlbLhSoQXTKzJMRzhao=";
};
patches = [
# Some tests use networking, so we skip them.
./0001-Disable-NIC-tests-that-fail-in-the-Nix-sandbox.patch
# They used constants from another package that I couldn't figure
# out how to resolve, so hardcoded the constants.
./0002-version-gen-don-t-use-unnecessary-constants.patch
];
preConfigure = ''
rm -r ./Tools/src/goreportcard
printf "#!/bin/sh\ntrue" > ./Tools/src/checkstyle.sh
substituteInPlace agent/platform/platform_unix.go \
--replace "/usr/bin/uname" "${coreutils}/bin/uname" \
--replace '"/bin", "hostname"' '"${nettools}/bin/hostname"' \
--replace '"lsb_release"' '"${fake-lsb-release}/bin/lsb_release"'
substituteInPlace agent/managedInstances/fingerprint/hardwareInfo_unix.go \
--replace /usr/sbin/dmidecode ${dmidecode}/bin/dmidecode
substituteInPlace agent/session/shell/shell_unix.go \
--replace '"script"' '"${util-linux}/bin/script"'
echo "${version}" > VERSION
'' + lib.optionalString overrideEtc ''
substituteInPlace agent/appconfig/constants_unix.go \
--replace '"/etc/amazon/ssm/"' '"${placeholder "out"}/etc/amazon/ssm/"'
'';
preBuild = ''
cp -r go/src/${goPackagePath}/vendor/src go
pushd go/src/${goPackagePath}
# Note: if this step fails, please patch the code to fix it! Please only skip
# tests if it is not feasible for the test to pass in a sandbox.
make quick-integtest
make pre-release
make pre-build
popd
'';
postBuild = ''
pushd go/bin
rm integration-cli versiongenerator generator
mv core amazon-ssm-agent
mv agent ssm-agent-worker
mv cli-main ssm-cli
mv worker ssm-document-worker
mv logging ssm-session-logger
mv sessionworker ssm-session-worker
popd
'';
# These templates retain their `.template` extensions on installation. The
# amazon-ssm-agent.json.template is required as default configuration when an
# amazon-ssm-agent.json isn't present. Here, we retain the template to show
# we're using the default configuration.
# seelog.xml isn't actually required to run, but it does ship as a template
# with debian packages, so it's here for reference. Future work in the nixos
# module could use this template and substitute a different log level.
postInstall = ''
mkdir -p $out/etc/amazon/ssm
cp go/src/${goPackagePath}/amazon-ssm-agent.json.template $out/etc/amazon/ssm/amazon-ssm-agent.json.template
cp go/src/${goPackagePath}/seelog_unix.xml $out/etc/amazon/ssm/seelog.xml.template
'';
postFixup = ''
wrapProgram $out/bin/amazon-ssm-agent --prefix PATH : ${bashInteractive}/bin
'';
meta = with lib; {
description = "Agent to enable remote management of your Amazon EC2 instance configuration";
homepage = "https://github.com/aws/amazon-ssm-agent";
license = licenses.asl20;
platforms = platforms.unix;
maintainers = with maintainers; [ copumpkin manveru ];
};
}