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mod common;
use std::fs::File;
use std::path::{Path, PathBuf};
use std::process::{Child, Command, Stdio};
use std::time::Duration;
use common::{
READY_WAIT, eventually, gate, identity, must, reap, scratch_dir, status,
stop_namespace_processes, sudo, wait_exit, wait_for_log,
};
const GATE: &str = "SOCIALWEB_MESHD_K3S";
const K3S_READY_WAIT: Duration = Duration::from_secs(180);
const APISERVER_PORT: &str = "16443";
struct Rig {
ns: String,
dir: PathBuf,
children: Vec<Child>,
}
impl Drop for Rig {
fn drop(&mut self) {
stop_namespace_processes(&self.ns);
for child in &mut self.children {
reap(child, Duration::from_secs(20));
}
let _ = sudo(&["ip", "netns", "del", &self.ns]);
let _ = sudo(&["rm", "-rf", self.dir.to_str().unwrap()]);
}
}
fn kubectl(rig: &Rig, args: &[&str]) -> std::process::Output {
let admin = rig.dir.join("admin.yaml");
let mut full = vec![
"ip",
"netns",
"exec",
&rig.ns,
"k3s",
"kubectl",
"--kubeconfig",
admin.to_str().unwrap(),
];
full.extend_from_slice(args);
sudo(&full)
}
fn kubectl_ok(rig: &Rig, args: &[&str]) -> String {
let out = kubectl(rig, args);
assert!(
out.status.success(),
"kubectl {args:?}: {}{}",
String::from_utf8_lossy(&out.stdout),
String::from_utf8_lossy(&out.stderr)
);
String::from_utf8_lossy(&out.stdout).into_owned()
}
fn node_manifest(name: &str, cidr: &str, mesh: Option<(&str, &str)>) -> serde_json::Value {
let mut annotations = serde_json::Map::new();
if let Some((endpoint, did)) = mesh {
annotations.insert(
"socialweb.computer/mesh-endpoint".to_string(),
endpoint.into(),
);
annotations.insert("socialweb.computer/mesh-did".to_string(), did.into());
}
serde_json::json!({
"apiVersion": "v1",
"kind": "Node",
"metadata": {"name": name, "annotations": annotations},
"spec": {"podCIDR": cidr, "podCIDRs": [cidr]}
})
}
fn apply(rig: &Rig, file: &str, manifest: &serde_json::Value) {
let path = rig.dir.join(file);
std::fs::write(&path, manifest.to_string()).unwrap();
kubectl_ok(rig, &["apply", "-f", path.to_str().unwrap()]);
}
fn mint_node_credentials(rig: &Rig, node: &str) -> PathBuf {
let tls = rig.dir.join("data/server/tls");
let key_pkcs8 = rig.dir.join(format!("{node}.pkcs8.key"));
let key = rig.dir.join(format!("{node}.key"));
let csr = rig.dir.join(format!("{node}.csr"));
let crt = rig.dir.join(format!("{node}.crt"));
must(&[
"openssl",
"req",
"-new",
"-newkey",
"ec",
"-pkeyopt",
"ec_paramgen_curve:prime256v1",
"-nodes",
"-keyout",
key_pkcs8.to_str().unwrap(),
"-out",
csr.to_str().unwrap(),
"-subj",
&format!("/O=system:nodes/CN=system:node:{node}"),
]);
must(&[
"openssl",
"ec",
"-in",
key_pkcs8.to_str().unwrap(),
"-out",
key.to_str().unwrap(),
]);
must(&[
"openssl",
"x509",
"-req",
"-in",
csr.to_str().unwrap(),
"-CA",
tls.join("client-ca.crt").to_str().unwrap(),
"-CAkey",
tls.join("client-ca.key").to_str().unwrap(),
"-CAcreateserial",
"-days",
"1",
"-out",
crt.to_str().unwrap(),
]);
let kubeconfig = rig.dir.join(format!("{node}.kubeconfig"));
let text = format!(
"apiVersion: v1\nkind: Config\nclusters:\n- cluster:\n server: https://127.0.0.1:{APISERVER_PORT}\n certificate-authority: data/server/tls/server-ca.crt\n name: local\ncontexts:\n- context:\n cluster: local\n namespace: default\n user: user\n name: Default\ncurrent-context: Default\npreferences: {{}}\nusers:\n- name: user\n user:\n client-certificate: {node}.crt\n client-key: {node}.key\n"
);
std::fs::write(&kubeconfig, text).unwrap();
kubeconfig
}
fn start_meshd(
rig: &mut Rig,
bin: &str,
node: &str,
kubeconfig: &Path,
secret: &Path,
log: &Path,
) -> usize {
let file = File::create(log).unwrap();
let child = Command::new("sudo")
.args(["-n", "ip", "netns", "exec", &rig.ns, bin, "run"])
.args(["--node-name", node])
.arg("--kubeconfig")
.arg(kubeconfig)
.arg("--secret-file")
.arg(secret)
.args(["--relay", "disabled", "--discovery", "none"])
.args(["--metrics-listen", "127.0.0.1:9469"])
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::from(file))
.spawn()
.expect("spawn meshd");
rig.children.push(child);
rig.children.len() - 1
}
fn route_nodes(ns: &str) -> Vec<String> {
status(ns)["routes"]
.as_array()
.unwrap()
.iter()
.map(|r| r["node"].as_str().unwrap().to_string())
.collect()
}
fn installed(ns: &str) -> String {
must(&["ip", "-n", ns, "route", "show", "dev", "swmesh0"])
}
#[test]
fn with_a_kubelet_identity_meshd_annotates_its_own_node_and_follows_the_node_list() {
if !gate(GATE) {
return;
}
let bin_path = common::meshd_bin();
let bin = bin_path.as_str();
let dir = scratch_dir("k3s");
let mut rig = Rig {
ns: format!("swmesh-{}-k3s", std::process::id()),
dir,
children: Vec::new(),
};
must(&["ip", "netns", "add", &rig.ns]);
must(&["ip", "-n", &rig.ns, "link", "set", "lo", "up"]);
must(&[
"ip", "-n", &rig.ns, "link", "add", "uplink0", "type", "dummy",
]);
must(&[
"ip",
"-n",
&rig.ns,
"addr",
"add",
"10.250.0.2/24",
"dev",
"uplink0",
]);
must(&["ip", "-n", &rig.ns, "link", "set", "uplink0", "up"]);
must(&[
"ip",
"-n",
&rig.ns,
"route",
"add",
"default",
"via",
"10.250.0.1",
]);
let data = rig.dir.join("data");
let admin = rig.dir.join("admin.yaml");
let k3s_log = rig.dir.join("k3s.log");
let k3s = Command::new("sudo")
.args(["-n", "ip", "netns", "exec", &rig.ns, "k3s", "server"])
.args(["--disable-agent", "--disable-cloud-controller"])
.args([
"--disable",
"traefik,servicelb,metrics-server,local-storage,coredns",
])
.arg("--data-dir")
.arg(&data)
.args([
"--bind-address",
"127.0.0.1",
"--advertise-address",
"127.0.0.1",
])
.args(["--https-listen-port", APISERVER_PORT])
.arg("--write-kubeconfig")
.arg(&admin)
.args(["--write-kubeconfig-mode", "0644"])
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::from(File::create(&k3s_log).unwrap()))
.spawn()
.expect("spawn k3s");
rig.children.push(k3s);
eventually(K3S_READY_WAIT, "k3s apiserver /readyz", || {
kubectl(&rig, &["get", "--raw", "/readyz"]).status.success()
});
let secret_a = rig.dir.join("a.secret");
let (endpoint_a, did_a) = identity(bin, &secret_a);
let (endpoint_b, did_b) = identity(bin, &rig.dir.join("b.secret"));
let (endpoint_c, did_c) = identity(bin, &rig.dir.join("c.secret"));
apply(
&rig,
"node-a.json",
&node_manifest("node-a", "10.42.1.0/24", None),
);
apply(
&rig,
"node-b.json",
&node_manifest("node-b", "10.42.2.0/24", Some((&endpoint_b, &did_b))),
);
let kubeconfig_a = mint_node_credentials(&rig, "node-a");
let log_a = rig.dir.join("meshd-a.log");
let a = start_meshd(&mut rig, bin, "node-a", &kubeconfig_a, &secret_a, &log_a);
let before_rbac = wait_for_log(
&mut rig.children[a],
&log_a,
"\"event\":\"list_nodes_forbidden\"",
READY_WAIT,
);
assert!(
before_rbac.contains("cannot read all nodes, only its own Node object"),
"{before_rbac}"
);
assert_eq!(status(&rig.ns)["ready"], false);
let rbac = Path::new(env!("CARGO_MANIFEST_DIR")).join("deploy/node-reader-rbac.yaml");
kubectl_ok(&rig, &["apply", "-f", rbac.to_str().unwrap()]);
wait_for_log(
&mut rig.children[a],
&log_a,
"\"event\":\"ready\"",
READY_WAIT,
);
let annotations = kubectl_ok(
&rig,
&[
"get",
"node",
"node-a",
"-o",
"jsonpath={.metadata.annotations}",
],
);
let annotations: serde_json::Value = serde_json::from_str(&annotations).unwrap();
assert_eq!(annotations["socialweb.computer/mesh-endpoint"], endpoint_a);
assert_eq!(annotations["socialweb.computer/mesh-did"], did_a);
assert_eq!(route_nodes(&rig.ns), vec!["node-b"]);
assert!(installed(&rig.ns).contains("10.42.2.0/24"));
apply(
&rig,
"node-c.json",
&node_manifest("node-c", "10.42.3.0/24", Some((&endpoint_c, &did_c))),
);
eventually(Duration::from_secs(15), "watch adds node-c", || {
route_nodes(&rig.ns) == vec!["node-b", "node-c"]
&& installed(&rig.ns).contains("10.42.3.0/24")
});
kubectl_ok(&rig, &["delete", "node", "node-b", "--wait=true"]);
eventually(Duration::from_secs(15), "watch drops node-b", || {
route_nodes(&rig.ns) == vec!["node-c"] && !installed(&rig.ns).contains("10.42.2.0/24")
});
stop_namespace_processes_named(&rig, "socialweb-meshd");
assert_eq!(wait_exit(&mut rig.children[a], Duration::from_secs(10)), 0);
let log_wrong = rig.dir.join("meshd-wrong.log");
let secret_wrong = rig.dir.join("wrong.secret");
let wrong = start_meshd(
&mut rig,
bin,
"node-c",
&kubeconfig_a,
&secret_wrong,
&log_wrong,
);
let code = wait_exit(&mut rig.children[wrong], Duration::from_secs(30));
let text = std::fs::read_to_string(&log_wrong).unwrap_or_default();
assert_eq!(
code, 4,
"patching another node's Node is forbidden:\n{text}"
);
assert!(text.contains("node_patch_forbidden"), "{text}");
}
fn stop_namespace_processes_named(rig: &Rig, name: &str) {
let pids = sudo(&["ip", "netns", "pids", &rig.ns]);
for pid in String::from_utf8_lossy(&pids.stdout).split_whitespace() {
let comm = std::fs::read_to_string(format!("/proc/{pid}/comm")).unwrap_or_default();
if comm.trim() == name {
let _ = sudo(&["kill", "-TERM", pid]);
}
}
}
