Store CA cert in all namespaces (#5)

* Store CA cert in all namespaces

* mypy

fixca/__main__.py

@@ -31,13 +31,19 @@ def main() -> None:
     add_event_listener(EventType.SHUTDOWN, shutdown)
 
     CA.initialize(namespace=args.namespace, secret_name=args.secret, dummy_ca=args.dummy_ca)
+    CA.store_ca_certs()
 
-    common_name = "ca.fix"
+    common_name = "fixca"
     cert_key = gen_rsa_key()
     cert_csr = gen_csr(
         cert_key,
         common_name=common_name,
-        san_dns_names=[common_name],
+        san_dns_names=[
+            common_name,
+            f"{common_name}.{args.namespace}",
+            f"{common_name}.{args.namespace}.svc",
+            f"{common_name}.{args.namespace}.svc.cluster.local",
+        ],
     )
     cert_crt = CA.sign(cert_csr)
     with TemporaryDirectory() as tmpdir:

fixca/ca.py

@@ -20,7 +20,7 @@
     gen_ca_bundle_bytes,
 )
 from resotolib.jwt import encode_jwt, decode_jwt_from_headers
-from .k8s import get_secret, set_secret
+from .k8s import get_secret, set_secret, get_namespaces
 from .utils import str_to_bool
 
 
@@ -143,6 +143,17 @@ def store_secret(
             data=secret,
         )
 
+    @requires_initialized
+    def store_ca_certs(self, exclude_system: bool = True) -> None:
+        assert self.cert is not None
+        for namespace in get_namespaces(exclude_system=exclude_system):
+            log.debug(f"Storing CA cert in {namespace}/fix-ca-cert")
+            set_secret(
+                namespace=namespace,
+                secret_name="fix-ca-cert",
+                data={"ca.crt": cert_to_bytes(self.cert).decode("utf-8")},
+            )
+
 
 CA: CertificateAuthority = CertificateAuthority()
 PSK: Optional[str] = None

fixca/k8s.py

@@ -4,6 +4,8 @@
 from resotolib.logger import log
 from kubernetes import client, config
 from kubernetes.client.exceptions import ApiException
+from kubernetes.client.models.v1_namespace_list import V1NamespaceList
+from kubernetes.client.models.v1_namespace import V1Namespace
 from .utils import memoize
 
 
@@ -60,3 +62,20 @@ def set_secret(namespace: str, secret_name: str, data: dict[str, str]) -> None:
                     raise
         else:
             raise
+
+
+def get_namespaces(exclude_system: bool = True) -> list[str]:
+    k8s = k8s_client()
+
+    system_namespaces = ["kube-system", "kube-public", "kube-node-lease"]
+
+    try:
+        namespaces: V1NamespaceList = k8s.list_namespace()
+        return [
+            ns.metadata.name
+            for ns in namespaces.items
+            if isinstance(ns, V1Namespace) and (not exclude_system or ns.metadata.name not in system_namespaces)
+        ]
+    except ApiException as e:
+        log.error(f"Failed to fetch namespaces: {e}")
+        return []