nixos: Add ec2-metadata-fetcher.nix file
To share the metadata fetcher script between ec2 and Openstack images.
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@ -8,7 +8,13 @@
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with lib;
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with lib;
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let cfg = config.ec2; in
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let
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cfg = config.ec2;
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metadataFetcher = import ./ec2-metadata-fetcher.nix {
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targetRoot = "$targetRoot/";
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wgetExtraOptions = "-q";
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};
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in
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{
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{
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imports = [ ../profiles/headless.nix ./ec2-data.nix ./amazon-init.nix ];
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imports = [ ../profiles/headless.nix ./ec2-data.nix ./amazon-init.nix ];
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@ -61,26 +67,7 @@ let cfg = config.ec2; in
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# Nix operations.
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# Nix operations.
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boot.initrd.postMountCommands =
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boot.initrd.postMountCommands =
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''
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''
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metaDir=$targetRoot/etc/ec2-metadata
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${metadataFetcher}
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mkdir -m 0755 -p "$metaDir"
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echo "getting EC2 instance metadata..."
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if ! [ -e "$metaDir/ami-manifest-path" ]; then
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wget -q -O "$metaDir/ami-manifest-path" http://169.254.169.254/1.0/meta-data/ami-manifest-path
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fi
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if ! [ -e "$metaDir/user-data" ]; then
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wget -q -O "$metaDir/user-data" http://169.254.169.254/1.0/user-data && chmod 600 "$metaDir/user-data"
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fi
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if ! [ -e "$metaDir/hostname" ]; then
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wget -q -O "$metaDir/hostname" http://169.254.169.254/1.0/meta-data/hostname
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fi
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if ! [ -e "$metaDir/public-keys-0-openssh-key" ]; then
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wget -q -O "$metaDir/public-keys-0-openssh-key" http://169.254.169.254/1.0/meta-data/public-keys/0/openssh-key
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fi
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diskNr=0
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diskNr=0
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diskForUnionfs=
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diskForUnionfs=
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23
nixos/modules/virtualisation/ec2-metadata-fetcher.nix
Normal file
23
nixos/modules/virtualisation/ec2-metadata-fetcher.nix
Normal file
@ -0,0 +1,23 @@
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{ targetRoot, wgetExtraOptions }:
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''
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metaDir=${targetRoot}etc/ec2-metadata
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mkdir -m 0755 -p "$metaDir"
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echo "getting EC2 instance metadata..."
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if ! [ -e "$metaDir/ami-manifest-path" ]; then
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wget ${wgetExtraOptions} -O "$metaDir/ami-manifest-path" http://169.254.169.254/1.0/meta-data/ami-manifest-path
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fi
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if ! [ -e "$metaDir/user-data" ]; then
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wget ${wgetExtraOptions} -O "$metaDir/user-data" http://169.254.169.254/1.0/user-data && chmod 600 "$metaDir/user-data"
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fi
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if ! [ -e "$metaDir/hostname" ]; then
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wget ${wgetExtraOptions} -O "$metaDir/hostname" http://169.254.169.254/1.0/meta-data/hostname
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fi
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if ! [ -e "$metaDir/public-keys-0-openssh-key" ]; then
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wget ${wgetExtraOptions} -O "$metaDir/public-keys-0-openssh-key" http://169.254.169.254/1.0/meta-data/public-keys/0/openssh-key
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fi
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''
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@ -2,6 +2,12 @@
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with lib;
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with lib;
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let
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metadataFetcher = import ./ec2-metadata-fetcher.nix {
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targetRoot = "/";
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wgetExtraOptions = "--retry-connrefused";
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};
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in
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{
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{
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imports = [
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imports = [
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../profiles/qemu-guest.nix
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../profiles/qemu-guest.nix
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@ -39,28 +45,7 @@ with lib;
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before = [ "apply-ec2-data.service" "amazon-init.service"];
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before = [ "apply-ec2-data.service" "amazon-init.service"];
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wants = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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after = [ "network-online.target" ];
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after = [ "network-online.target" ];
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script =
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script = metadataFetcher;
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''
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metaDir=/etc/ec2-metadata
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mkdir -m 0755 -p "$metaDir"
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echo "getting Openstack instance metadata (via EC2 API)..."
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if ! [ -e "$metaDir/ami-manifest-path" ]; then
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wget --retry-connrefused -O "$metaDir/ami-manifest-path" http://169.254.169.254/1.0/meta-data/ami-manifest-path
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fi
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if ! [ -e "$metaDir/user-data" ]; then
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wget --retry-connrefused -O "$metaDir/user-data" http://169.254.169.254/1.0/user-data && chmod 600 "$metaDir/user-data"
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fi
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if ! [ -e "$metaDir/hostname" ]; then
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wget --retry-connrefused -O "$metaDir/hostname" http://169.254.169.254/1.0/meta-data/hostname
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fi
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if ! [ -e "$metaDir/public-keys-0-openssh-key" ]; then
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wget --retry-connrefused -O "$metaDir/public-keys-0-openssh-key" http://169.254.169.254/1.0/meta-data/public-keys/0/openssh-key
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fi
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'';
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restartIfChanged = false;
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restartIfChanged = false;
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unitConfig.X-StopOnRemoval = false;
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unitConfig.X-StopOnRemoval = false;
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serviceConfig = {
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serviceConfig = {
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