mirror of
https://github.com/ryan4yin/nix-config.git
synced 2026-11-13 12:13:36 +01:00
Ryan Yin
d4aa25d368
The etcd client API listens on the masters' static LAN address, and the pod-source deny lists omitted it. Add 2379 to both nft drop lines and assert it in the security-k3s-pod-firewall eval test. 2381 (etcd metrics, scraped by in-cluster monitoring) stays reachable by design. Pairs with the matching Cilium egressDeny port in k8s-gitops. Assisted-by: DeepSeek Harness (gpt-6-astra)
54 lines
1.5 KiB
Nix
54 lines
1.5 KiB
Nix
{
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pkgs,
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masterHost,
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tokenFile,
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nodeLabels ? [ ],
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k3sExtraArgs ? [ ],
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...
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}:
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let
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package = pkgs.k3s;
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in
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{
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environment.systemPackages = [ package ];
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networking.enableIPv6 = true;
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boot.kernel.sysctl = {
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"net.ipv4.ip_forward" = 1;
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"net.ipv6.conf.all.forwarding" = 1;
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};
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# Deny pods the credential-bearing host ports before the pod accept below.
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networking.firewall.extraInputRules = pkgs.lib.mkAfter ''
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ip saddr 10.0.0.0/8 tcp dport { 22, 2049, 2283, 2379, 5432, 5900, 5901, 5902, 5903, 8000, 8081, 8082, 9090, 9093, 9100, 9633, 9835 } drop
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ip6 saddr fd00::/104 tcp dport { 22, 2049, 2283, 2379, 5432, 5900, 5901, 5902, 5903, 8000, 8081, 8082, 9090, 9093, 9100, 9633, 9835 } drop
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ip saddr 10.0.0.0/8 accept
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ip6 saddr fd00::/104 accept
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'';
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services.k3s = {
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enable = true;
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inherit package tokenFile;
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role = "agent";
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serverAddr = "https://${masterHost}:6443";
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# https://docs.k3s.io/cli/agent
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extraFlags =
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let
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flagList = [
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"--data-dir /var/lib/rancher/k3s"
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]
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++ (map (label: "--node-label=${label}") nodeLabels)
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++ k3sExtraArgs;
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in
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pkgs.lib.concatStringsSep " " flagList;
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};
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# Share k3s's CNI dirs with plugins using the conventional paths (cilium, istio-cni).
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systemd.tmpfiles.rules = [
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"L+ /opt/cni/bin - - - - /var/lib/rancher/k3s/data/cni/"
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"d /var/lib/rancher/k3s/agent/etc/cni/net.d 0751 root root - -"
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"L+ /etc/cni/net.d - - - - /var/lib/rancher/k3s/agent/etc/cni/net.d"
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];
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}
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