bind, cert-manager: Cleanups

bind/README.md

@@ -1,32 +1,31 @@
-#TODO:
+# Bind namespace
 
-- cert-manager talks to master to add domain names, and DNS-01 TLS through ns1.k-space.ee
-^ both-side link to cert-manager
+The Bind secondary servers and `external-dns` service pods are running in this namespace.
+The `external-dns` pods are used to declaratively update DNS records on the
+[Bind primary](https://git.k-space.ee/k-space/ansible/src/branch/main/authoritative-nameserver.yaml).
 
-bind-services (zone transfer to HA replicas from ns1.k-space.ee)
-
-### ns1.k-space.ee
-Primary authoritive nameserver replica. Other replicas live on Kube nodes
-Idea to move it to Zone.
-
-dns.yaml files add DNS records
-
-
-# Bind setup
-
-The Bind primary resides outside Kubernetes at `193.40.103.2` and
+The Bind primary `ns1.k-space.ee` resides outside Kubernetes at `193.40.103.2` and
 it's internally reachable via `172.20.0.2`.
-
+Bind secondaries perform AXFR (zone transfer) from `ns1.k-space.ee` using
+shared secret autentication.
+The primary triggers notification events to `172.20.53.{1..3}`
+which are internally exposed IP-s of the secondaries.
 Bind secondaries are hosted inside Kubernetes, load balanced behind `62.65.250.2` and
 under normal circumstances managed by [ArgoCD](https://argocd.k-space.ee/applications/argocd/bind).
 
-Ingresses and DNSEndpoints referring to `k-space.ee`, `kspace.ee`, `k6.ee`
-are picked up automatically by `external-dns` and updated on primary.
+Note that [cert-manager](https://git.k-space.ee/k-space/kube/src/branch/master/cert-manager/issuer.yml) also performs DNS updates on the Bind primary.
 
-The primary triggers notification events to `172.20.53.{1..3}`
-which are internally exposed IP-s of the secondaries.
 
-# Secrets
+# For user
+
+`Ingresses` and `DNSEndpoint` resources under `k-space.ee`, `kspace.ee`, `k6.ee`
+domains are picked up automatically by `external-dns` and updated on the Bind primary.
+To find usage examples in this repository use
+`grep -r -A25 "^kind: Ingress" .` and
+`grep -R -r -A100 "^kind: DNSEndpoint" .`
+
+
+# For administrator
 
 To configure TSIG secrets:
 

bind/bind-secondary.yaml

@@ -1,8 +1,10 @@
+# yamllint disable rule:line-length
 ---
 apiVersion: v1
 kind: ConfigMap
 metadata:
   name: bind-secondary-config-local
+  namespace: bind
 data:
   named.conf.local: |
     zone "codemowers.ee" { type slave; masters { 172.20.0.2 key readonly; }; };
@@ -13,6 +15,7 @@ apiVersion: v1
 kind: ConfigMap
 metadata:
   name: bind-secondary-config
+  namespace: bind
 data:
   named.conf: |
     include "/etc/bind/named.conf.local";
@@ -36,6 +39,7 @@ metadata:
   name: bind-secondary
   namespace: bind
 spec:
+  revisionHistoryLimit: 0
   replicas: 3
   selector:
     matchLabels:
@@ -45,15 +49,9 @@ spec:
       labels:
         app: bind-secondary
     spec:
-      volumes:
-        - name: run
-          emptyDir: {}
       containers:
         - name: bind-secondary
           image: internetsystemsconsortium/bind9:9.20
-          volumeMounts:
-            - mountPath: /run/named
-              name: run
           workingDir: /var/bind
           command:
             - named

bind/external-dns-k-space.yaml

@@ -3,6 +3,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: external-dns-k-space
+  namespace: bind
 spec:
   revisionHistoryLimit: 0
   selector:

bind/external-dns-k6.yaml

@@ -3,6 +3,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: external-dns-k6
+  namespace: bind
 spec:
   revisionHistoryLimit: 0
   selector:
@@ -41,6 +42,7 @@ apiVersion: externaldns.k8s.io/v1alpha1
 kind: DNSEndpoint
 metadata:
   name: k6
+  namespace: bind
 spec:
   endpoints:
     - dnsName: k6.ee

bind/external-dns-kspace.yaml

@@ -3,6 +3,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: external-dns-kspace
+  namespace: bind
 spec:
   revisionHistoryLimit: 0
   selector:
@@ -41,6 +42,7 @@ apiVersion: externaldns.k8s.io/v1alpha1
 kind: DNSEndpoint
 metadata:
   name: kspace
+  namespace: bind
 spec:
   endpoints:
     - dnsName: kspace.ee

bind/external-dns.yaml

@@ -43,11 +43,13 @@ apiVersion: v1
 kind: ServiceAccount
 metadata:
   name: external-dns
+  namespace: bind
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
   name: external-dns-viewer
+  namespace: bind
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole

cert-manager/README.md

@@ -1,18 +1,33 @@
 # cert-manager
 
 `cert-manager` is used to obtain TLS certificates from Let's Encrypt.
+It uses DNS-01 challenge in conjunction with Bind primary
+at `ns1.k-space.ee`.
+Refer to the [Bind primary Ansible playbook](https://git.k-space.ee/k-space/ansible/src/branch/main/authoritative-nameserver.yaml) and
+[Bind namespace on Kubernetes cluster](https://git.k-space.ee/k-space/kube/src/branch/master/bind)
+for more details
 
-Added manifest with:
+# For user
+
+Use `Certificate` CRD of cert-manager, refer to
+[official documentation](https://cert-manager.io/docs/usage/certificate/).
+
+To find usage examples in this repository use
+`grep -r -A10 "^kind: Certificate" .`
+
+# For administrator
+
+Deployed with:
 
 ```
 curl -L https://github.com/jetstack/cert-manager/releases/download/v1.15.1/cert-manager.yaml -O
-```
-
-To update certificate issuer
-
-```
 kubectl apply -f cert-manager.yaml
-kubectl apply -f issuer.yml
+```
+
+To update the issuer configuration or TSIG secret:
+
+```
+kubectl apply -f default-issuer.yml
  kubectl -n cert-manager create secret generic tsig-secret \
     --from-literal=TSIG_SECRET=<secret>
 ```

cert-manager/default-issuer.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: default
+  namespace: cert-manager
+spec:
+  acme:
+    email: info@k-space.ee
+    server: https://acme-v02.api.letsencrypt.org/directory
+    privateKeySecretRef:
+      name: example-issuer-account-key
+    solvers:
+      - dns01:
+          rfc2136:
+            nameserver: 193.40.103.2
+            tsigKeyName: readwrite.
+            tsigAlgorithm: HMACSHA512
+            tsigSecretSecretRef:
+              name: tsig-secret
+              key: TSIG_SECRET

cert-manager/issuer.yml

@@ -1,19 +0,0 @@
-apiVersion: cert-manager.io/v1
-kind: ClusterIssuer
-metadata:
-  name: default
-spec:
-  acme:
-    email: info@k-space.ee
-    server: https://acme-v02.api.letsencrypt.org/directory
-    privateKeySecretRef:
-      name: example-issuer-account-key
-    solvers:
-    - dns01:
-        rfc2136:
-          nameserver: 193.40.103.2
-          tsigKeyName: acme.
-          tsigAlgorithm: HMACSHA512
-          tsigSecretSecretRef:
-            name: tsig-secret
-            key: TSIG_SECRET