122e125d6b
{
test1 = {pkgs, config, ...}:
{
# NixOS config of machine test1
...
};
test2 = {pkgs, config, ...}:
{
# NixOS config of machine test2
...
};
}
And an infrastructure expression, e.g:
{
test1 = {
hostName = "test1.example.org";
system = "i686-linux";
};
test2 = {
hostName = "test2.example.org";
system = "x86_64-linux";
};
}
And by executing:
nixos-deploy-network -n network.nix -i infrastructure.nix
The system configurations in the network expression are built, transferred to the machines in the network and finally activated.
svn path=/nixos/trunk/; revision=24146
62 lines
2.1 KiB
Nix
62 lines
2.1 KiB
Nix
{ nixos ? /etc/nixos/nixos
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, nixpkgs ? /etc/nixos/nixpkgs
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, networkExpr
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, infrastructureExpr
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}:
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let
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pkgs = import nixpkgs {};
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inherit (builtins) attrNames getAttr listToAttrs concatMapStrings;
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network = import networkExpr;
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infrastructure = import infrastructureExpr;
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generateScript = network: infrastructure: configs:
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concatMapStrings (configurationName:
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let
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infrastructureElement = getAttr configurationName infrastructure;
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config = getAttr configurationName configs;
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in
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''
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echo "=== upgrading ${infrastructureElement.hostName} ==="
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nix-copy-closure --to ${infrastructureElement.hostName} ${config.system.build.toplevel} \
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&& ssh $NIX_SSHOPTS ${infrastructureElement.hostName} nix-env -p /nix/var/nix/profiles/system --set ${config.system.build.toplevel} \
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&& ssh $NIX_SSHOPTS ${infrastructureElement.hostName} ${config.system.build.toplevel}/bin/switch-to-configuration switch \
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&& { succeeded=$((succeeded + 1)); } \
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|| { failed=$((failed + 1)); echo 'WARNING: upgrade of ${infrastructureElement.hostName} failed!'; }
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''
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) (attrNames network)
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;
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evaluateMachines = network: infrastructure:
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listToAttrs (map (configurationName:
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let
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configuration = getAttr configurationName network;
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system = (getAttr configurationName infrastructure).system;
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in
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{ name = configurationName;
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value = (import "${nixos}/lib/eval-config.nix" {
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inherit nixpkgs system;
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modules = [ configuration ];
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extraArgs = evaluateMachines network infrastructure;
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}).config; }
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) (attrNames (network)))
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;
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configs = evaluateMachines network infrastructure;
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in
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pkgs.stdenv.mkDerivation {
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name = "deploy-script";
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buildCommand = ''
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ensureDir $out/bin
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cat > $out/bin/deploy-systems << "EOF"
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#! ${pkgs.stdenv.shell} -e
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failed=0; succeeded=0
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${generateScript network infrastructure configs}
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echo "Upgrade of $failed machines failed, $succeeded machines succeeded.";
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EOF
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chmod +x $out/bin/deploy-systems
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'';
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}
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