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Merge pull request #55649 from johanot/flannel-with-kubernetes-backend

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nixos/flannel: add kubernetes as storage backend (and fix test)
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Jaka Hudoklin 2019-02-15 19:55:56 +01:00 committed by GitHub
commit 5ae048071d
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3 changed files with 42 additions and 5 deletions
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41
nixos/modules/services/networking/flannel.nix
View File

@ -73,11 +73,35 @@ in {
};
};
kubeconfig = mkOption {
description = ''
Path to kubeconfig to use for storing flannel config using the
Kubernetes API
'';
type = types.nullOr types.path;
default = null;
};
network = mkOption {
description = " IPv4 network in CIDR format to use for the entire flannel network.";
type = types.str;
};
nodeName = mkOption {
description = ''
Needed when running with Kubernetes as backend as this cannot be auto-detected";
'';
type = types.nullOr types.str;
default = with config.networking; (hostName + optionalString (!isNull domain) ".${domain}");
example = "node1.example.com";
};
storageBackend = mkOption {
description = "Determines where flannel stores its configuration at runtime";
type = types.enum ["etcd" "kubernetes"];
default = "etcd";
};
subnetLen = mkOption {
description = ''
The size of the subnet allocated to each host. Defaults to 24 (i.e. /24)
@ -122,17 +146,22 @@ in {
after = [ "network.target" ];
environment = {
FLANNELD_PUBLIC_IP = cfg.publicIp;
FLANNELD_IFACE = cfg.iface;
} // optionalAttrs (cfg.storageBackend == "etcd") {
FLANNELD_ETCD_ENDPOINTS = concatStringsSep "," cfg.etcd.endpoints;
FLANNELD_ETCD_KEYFILE = cfg.etcd.keyFile;
FLANNELD_ETCD_CERTFILE = cfg.etcd.certFile;
FLANNELD_ETCD_CAFILE = cfg.etcd.caFile;
FLANNELD_IFACE = cfg.iface;
ETCDCTL_CERT_FILE = cfg.etcd.certFile;
ETCDCTL_KEY_FILE = cfg.etcd.keyFile;
ETCDCTL_CA_FILE = cfg.etcd.caFile;
ETCDCTL_PEERS = concatStringsSep "," cfg.etcd.endpoints;
} // optionalAttrs (cfg.storageBackend == "kubernetes") {
FLANNELD_KUBE_SUBNET_MGR = "true";
FLANNELD_KUBECONFIG_FILE = cfg.kubeconfig;
NODE_NAME = cfg.nodeName;
};
preStart = ''
preStart = mkIf (cfg.storageBackend == "etcd") ''
echo "setting network configuration"
until ${pkgs.etcdctl.bin}/bin/etcdctl set /coreos.com/network/config '${builtins.toJSON networkConfig}'
do
@ -149,6 +178,12 @@ in {
serviceConfig.ExecStart = "${cfg.package}/bin/flannel";
};
services.etcd.enable = mkDefault (cfg.etcd.endpoints == ["http://127.0.0.1:2379"]);
services.etcd.enable = mkDefault (cfg.storageBackend == "etcd" && cfg.etcd.endpoints == ["http://127.0.0.1:2379"]);
# for some reason, flannel doesn't let you configure this path
# see: https://github.com/coreos/flannel/blob/master/Documentation/configuration.md#configuration
environment.etc."kube-flannel/net-conf.json" = mkIf (cfg.storageBackend == "kubernetes") {
source = pkgs.writeText "net-conf.json" (builtins.toJSON networkConfig);
};
};
}

1
nixos/tests/all-tests.nix
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@ -73,6 +73,7 @@ in
ferm = handleTest ./ferm.nix {};
firefox = handleTest ./firefox.nix {};
firewall = handleTest ./firewall.nix {};
flannel = handleTestOn ["x86_64-linux"] ./flannel.nix {};
flatpak = handleTest ./flatpak.nix {};
fsck = handleTest ./fsck.nix {};
fwupd = handleTestOn ["x86_64-linux"] ./fwupd.nix {}; # libsmbios is unsupported on aarch64

5
nixos/tests/flannel.nix
View File

@ -21,8 +21,9 @@ import ./make-test.nix ({ pkgs, ...} : rec {
services = {
etcd = {
enable = true;
listenClientUrls = ["http://etcd:2379"];
listenPeerUrls = ["http://etcd:2380"];
listenClientUrls = ["http://0.0.0.0:2379"]; # requires ip-address for binding
listenPeerUrls = ["http://0.0.0.0:2380"]; # requires ip-address for binding
advertiseClientUrls = ["http://etcd:2379"];
initialAdvertisePeerUrls = ["http://etcd:2379"];
initialCluster = ["etcd=http://etcd:2379"];
};