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Google Compute config: add a unit to wait for the metadata server to become available

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This commit is contained in:
Evgeny Egorochkin 2014-07-20 14:07:46 +03:00
parent f677e843d5
commit 2660e19b73
1 changed files with 18 additions and 4 deletions
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22
nixos/modules/virtualisation/google-compute-image.nix
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@ -121,12 +121,26 @@ in
networking.usePredictableInterfaceNames = false;
systemd.services.wait-metadata-online = {
description = "Wait for GCE metadata server to become reachable";
wantedBy = [ "network-online.target" ];
before = [ "network-online.target" ];
path = [ pkgs.netcat ];
script = ''
# wait for the metadata server to become available for up to 60 seconds
for counter in {1..30}; do sleep 2 && nc -vzw 2 metadata 80 && break; done
'';
serviceConfig.Type = "oneshot";
serviceConfig.RemainAfterExit = true;
};
systemd.services.fetch-ssh-keys =
{ description = "Fetch host keys and authorized_keys for root user";
wantedBy = [ "multi-user.target" ];
wantedBy = [ "sshd.service" ];
before = [ "sshd.service" ];
after = [ "network.target" ];
after = [ "network-online.target" ];
wants = [ "network-online.target" ];
path = [ pkgs.curl ];
script =
@ -148,7 +162,7 @@ in
fi
echo "obtaining SSH private host key..."
curl -o /root/ssh_host_ecdsa_key http://metadata/0.1/meta-data/attributes/ssh_host_ecdsa_key
curl -o /root/ssh_host_ecdsa_key --retry-max-time 60 http://metadata/0.1/meta-data/attributes/ssh_host_ecdsa_key
if [ $? -eq 0 -a -e /root/ssh_host_ecdsa_key ]; then
mv -f /root/ssh_host_ecdsa_key /etc/ssh/ssh_host_ecdsa_key
echo "downloaded ssh_host_ecdsa_key"
@ -156,7 +170,7 @@ in
fi
echo "obtaining SSH public host key..."
curl -o /root/ssh_host_ecdsa_key.pub http://metadata/0.1/meta-data/attributes/ssh_host_ecdsa_key_pub
curl -o /root/ssh_host_ecdsa_key.pub --retry-max-time 60 http://metadata/0.1/meta-data/attributes/ssh_host_ecdsa_key_pub
if [ $? -eq 0 -a -e /root/ssh_host_ecdsa_key.pub ]; then
mv -f /root/ssh_host_ecdsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub
echo "downloaded ssh_host_ecdsa_key.pub"