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nixos/kubernetes: Seed docker images before kubelet service start 

to speed up startup time because it can be parallelized.
This commit is contained in:
Christian Albrecht 2019-03-01 10:23:34 +01:00
parent cf8389c904
commit fd28c0a82a
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GPG Key ID: 866AF4B25DF7EB00
1 changed files with 17 additions and 6 deletions
nixos/modules/services/cluster/kubernetes
kubelet.nix

23
nixos/modules/services/cluster/kubernetes/kubelet.nix
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@ -257,12 +257,7 @@ in
before = [ "kubelet.target" ]; before = [ "kubelet.target" ];
path = with pkgs; [ gitMinimal openssh docker utillinux iproute ethtool thin-provisioning-tools iptables socat ] ++ top.path; path = with pkgs; [ gitMinimal openssh docker utillinux iproute ethtool thin-provisioning-tools iptables socat ] ++ top.path;
preStart = '' preStart = ''
${concatMapStrings (img: '' rm -f /opt/cni/bin/* || true
echo "Seeding docker image: ${img}"
docker load <${img}
'') cfg.seedDockerImages}
rm /opt/cni/bin/* || true
${concatMapStrings (package: '' ${concatMapStrings (package: ''
echo "Linking cni package: ${package}" echo "Linking cni package: ${package}"
ln -fs ${package}/bin/* /opt/cni/bin ln -fs ${package}/bin/* /opt/cni/bin
@ -328,6 +323,22 @@ in
systemd.services.docker.before = [ "kubelet.service" ]; systemd.services.docker.before = [ "kubelet.service" ];
systemd.services.docker-seed-images = {
wantedBy = [ "docker.service" ];
after = [ "docker.service" ];
before = [ "kubelet.service" ];
path = with pkgs; [ docker ];
preStart = ''
${concatMapStrings (img: ''
echo "Seeding docker image: ${img}"
docker load <${img}
'') cfg.seedDockerImages}
'';
script = "echo Ok";
serviceConfig.Type = "oneshot";
serviceConfig.Slice = "kubernetes.slice";
};
systemd.services.node-online = { systemd.services.node-online = {
wantedBy = [ "node-online.target" ]; wantedBy = [ "node-online.target" ];
after = [ "flannel.target" "kubelet.target" ]; after = [ "flannel.target" "kubelet.target" ];