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Initial attempt at configuring from EC2 userdata (with input from cstrahan). Now with VM tests!

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This commit is contained in:
Dan Peebles 2015-04-10 06:06:52 +02:00
parent f0753327f0
commit 4b758e374e
4 changed files with 79 additions and 3 deletions
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2
nixos/maintainers/scripts/ec2/amazon-base-config.nix
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@ -1,5 +1,5 @@
{ modulesPath, ...}:
{
imports = [ "${modulesPath}/virtualisation/amazon-image.nix" ];
imports = [ "${modulesPath}/virtualisation/amazon-init.nix" ];
services.journald.rateLimitBurst = 0;
}

52
nixos/modules/virtualisation/amazon-init.nix Normal file
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@ -0,0 +1,52 @@
{ config, pkgs, modulesPath, ... }:
# This attempts to pull a nix expression from this EC2 instance's user-data.
let
bootScript = pkgs.writeScript "bootscript.sh" ''
#!${pkgs.stdenv.shell} -eux
echo "attempting to fetch configuration from user-data..."
export PATH=${pkgs.nix}/bin:${pkgs.wget}/bin:${pkgs.systemd}/bin:${pkgs.gnugrep}/bin:${pkgs.gnused}/bin:${config.system.build.nixos-rebuild}/bin:$PATH
export NIX_PATH=/nix/var/nix/profiles/per-user/root/channels/nixos:nixos-config=/etc/nixos/configuration.nix:/nix/var/nix/profiles/per-user/root/channels
userData="$(mktemp)"
wget -q --wait=1 --tries=0 --retry-connrefused -O - http://169.254.169.254/2011-01-01/user-data > "$userData"
if [[ $? -eq 0 ]]; then
echo "user-data fetched"
# If the user-data looks like it could be a nix expression,
# copy it over. Also, look for a magic three-hash comment and set
# that as the channel.
if sed '/^\(#\|SSH_HOST_.*\)/d' < "$userData" | grep -q '\S'; then
channels="$(grep '^###' "$userData" | sed 's|###\s*||')"
printf "%s" "$channels" | while read channel; do
echo "writing channel: $channel"
done
if [[ -n "$channels" ]]; then
printf "%s" "$channels" > /root/.nix-channels
nix-channel --update
fi
echo "setting configuration"
cp "$userData" /etc/nixos/configuration.nix
else
echo "user-data does not appear to be a nix expression; ignoring"
fi
else
echo "failed to fetch user-data"
fi
type -f nixos-rebuild
nixos-rebuild switch
'';
in {
imports = [ "${modulesPath}/virtualisation/amazon-image.nix" ];
ec2.metadata = true;
boot.postBootCommands = ''
${bootScript} &
'';
}

3
nixos/release.nix
View File

@ -247,7 +247,8 @@ in rec {
tests.docker = hydraJob (import tests/docker.nix { system = "x86_64-linux"; });
tests.dockerRegistry = hydraJob (import tests/docker-registry.nix { system = "x86_64-linux"; });
tests.etcd = hydraJob (import tests/etcd.nix { system = "x86_64-linux"; });
tests.ec2 = hydraJob (import tests/ec2.nix { system = "x86_64-linux"; }).bootEc2NixOps;
tests.ec2-nixops = hydraJob (import tests/ec2.nix { system = "x86_64-linux"; }).boot-ec2-nixops;
tests.ec2-config = hydraJob (import tests/ec2.nix { system = "x86_64-linux"; }).boot-ec2-config;
tests.firefox = callTest tests/firefox.nix {};
tests.firewall = callTest tests/firewall.nix {};
tests.fleet = hydraJob (import tests/fleet.nix { system = "x86_64-linux"; });

25
nixos/tests/ec2.nix
View File

@ -62,7 +62,7 @@ let
"9ZcDMiWaEhoAR6FGoaGI04ff7CS+1yybQ= snakeoil"
];
in {
bootEc2NixOps = makeEc2Test {
boot-ec2-nixops = makeEc2Test {
name = "nixops-userdata";
sshPublicKey = snakeOilPublicKey; # That's right folks! My user's key is also the host key!
@ -93,4 +93,27 @@ in {
$machine->shutdown;
'';
};
boot-ec2-config = makeEc2Test {
name = "config-userdata";
sshPublicKey = snakeOilPublicKey;
userData = ''
### http://nixos.org/channels/nixos-unstable nixos
{
imports = [
<nixpkgs/nixos/modules/virtualisation/amazon-image.nix>
<nixpkgs/nixos/modules/testing/test-instrumentation.nix>
];
environment.etc.testFile = {
text = "whoa";
};
}
'';
script = ''
$machine->start;
$machine->waitForFile("/etc/testFile");
$machine->succeed("cat /etc/testFile | grep -q 'whoa'");
'';
};
}