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Cleanup pki: flannel

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This commit is contained in:
Christian Albrecht 2019-03-11 10:53:59 +01:00
parent ce83dc2c52
commit ea6985ffc1
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2 changed files with 45 additions and 35 deletions
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49
nixos/modules/services/cluster/kubernetes/flannel.nix
View File

@ -24,16 +24,26 @@ in
###### interface
options.services.kubernetes.flannel = {
enable = mkEnableOption "enable flannel networking";
kubeconfig = top.lib.mkKubeConfigOptions "Kubernetes flannel";
};
###### implementation
config = mkIf cfg.enable {
config = let
flannelPaths = filter (a: a != null) [
cfg.kubeconfig.caFile
cfg.kubeconfig.certFile
cfg.kubeconfig.keyFile
];
kubeconfig = top.lib.mkKubeConfig "flannel" cfg.kubeconfig;
in mkIf cfg.enable {
services.flannel = {
enable = mkDefault true;
network = mkDefault top.clusterCidr;
inherit storageBackend;
nodeName = config.services.kubernetes.kubelet.hostname;
inherit storageBackend kubeconfig;
nodeName = top.kubelet.hostname;
};
services.kubernetes.kubelet = {
@ -79,16 +89,35 @@ in
wantedBy = [ "flannel.target" ];
after = [ "kubelet.target" ];
before = [ "flannel.target" ];
path = [ pkgs.iptables ];
preStart = ''
${top.lib.mkWaitCurl ( with config.systemd.services.flannel; {
path = "/api/v1/nodes";
cacert = top.caFile;
args = "-o - | grep podCIDR >/dev/null";
} // optionalAttrs (environment ? cert) { inherit (environment) cert key; })}
path = with pkgs; [ iptables kubectl ];
environment.KUBECONFIG = kubeconfig;
preStart = let
args = [
"--selector=kubernetes.io/hostname=${top.kubelet.hostname}"
# flannel exits if node is not registered yet, before that there is no podCIDR
"--output=jsonpath={.items[0].spec.podCIDR}"
# if jsonpath cannot be resolved exit with status 1
"--allow-missing-template-keys=false"
];
in ''
until kubectl get nodes ${concatStringsSep " " args} 2>/dev/null; do
echo Waiting for ${top.kubelet.hostname} to be RegisteredNode
sleep 1
done
'';
unitConfig.ConditionPathExists = flannelPaths;
};
systemd.paths.flannel = {
wantedBy = [ "flannel.service" ];
pathConfig = {
PathExists = flannelPaths;
PathChanged = flannelPaths;
};
};
services.kubernetes.flannel.kubeconfig.server = mkDefault top.apiserverAddress;
systemd.services.docker = {
environment.DOCKER_OPTS = "-b none";
serviceConfig.EnvironmentFile = "-/run/flannel/docker";

31
nixos/modules/services/cluster/kubernetes/pki.nix
View File

@ -124,10 +124,6 @@ in
top.caFile
certmgrAPITokenPath
];
flannelPaths = [
cfg.certs.flannelClient.cert
cfg.certs.flannelClient.key
];
proxyPaths = mkIf top.proxy.enable [
cfg.certs.kubeProxyClient.cert
cfg.certs.kubeProxyClient.key
@ -375,27 +371,6 @@ in
127.0.0.1 etcd.${top.addons.dns.clusterDomain} etcd.local
'';
services.flannel = with cfg.certs.flannelClient; {
kubeconfig = top.lib.mkKubeConfig "flannel" {
server = top.apiserverAddress;
certFile = cert;
keyFile = key;
};
};
systemd.services.flannel = mkIf top.flannel.enable {
environment = { inherit (top.pki.certs.flannelClient) cert key; };
unitConfig.ConditionPathExists = flannelPaths;
};
systemd.paths.flannel = mkIf top.flannel.enable {
wantedBy = [ "flannel.service" ];
pathConfig = {
PathExists = flannelPaths;
PathChanged = flannelPaths;
};
};
systemd.services.kube-proxy = mkIf top.proxy.enable {
environment = { inherit (top.pki.certs.kubeProxyClient) cert key; };
unitConfig.ConditionPathExists = proxyPaths;
@ -453,6 +428,12 @@ in
keyFile = mkDefault key;
};
};
flannel = mkIf top.flannel.enable {
kubeconfig = with cfg.certs.flannelClient; {
certFile = cert;
keyFile = key;
};
};
scheduler = mkIf top.scheduler.enable {
kubeconfig = with cfg.certs.schedulerClient; {
certFile = mkDefault cert;