mTLS-readme added with configuration steps

README.md

@@ -223,6 +223,24 @@ kubectl --namespace kubviz port-forward $POD_NAME 3000
 
 3. Access "localhost:3000" in your web browser, where you'll be prompted to enter your credentials. Utilize the username "admin" and the password obtained from step 1 to proceed.
 
+#### mTLS - mutual TLS Feature
+
+Mutual TLS (mTLS) is an extension of standard Transport Layer Security (TLS) that enhances security by requiring both the client and server to authenticate and verify each other's identities during the SSL/TLS handshake process. This mutual authentication helps ensure that both parties are who they claim to be, providing a higher level of security for sensitive data exchanges.
+
+In our kubviz setup, we use mTLS for secure communication with the NATS server. Both the agent and the client connect to the NATS server using mTLS. The agent sends data to the NATS server securely, and the client also uses mTLS to receive data from the NATS server.
+
+#### Why Use mTLS?
+
+- **Enhanced Security:** mTLS ensures that both the client and server are authenticated, mitigating the risk of man-in-the-middle attacks.
+
+- **Data Integrity:** By verifying identities, mTLS ensures that data is exchanged between trusted entities only.
+
+- **Regulatory Compliance:** For many industries, mTLS is a requirement for compliance with regulations that mandate secure communication.
+
+#### Configuring mTLS
+
+To enable mTLS in your application for agent-to-NATS communication, [follow these steps:](docs/CONFIGURATION_MTLS.md)
+
 #### TTL - Time-To-Live Feature
 
 We've implemented a Time-To-Live (TTL) feature to streamline the management of data within your ClickHouse tables. With TTL, historical data can be automatically relocated to alternative storage or purged to optimize storage space. This feature is particularly valuable for scenarios like time-series data or logs where older data gradually loses its relevance over time.

docs/CONFIGURATION_MTLS.md

@@ -0,0 +1,133 @@
+# Configuring mTLS: Guidelines and Instructions
+
+**Step-1: Create a ca-config.cnf file**
+
+```$xslt
+[ req ]
+default_bits        = 2048
+distinguished_name  = req_distinguished_name
+req_extensions      = req_ext
+x509_extensions     = v3_ca
+[ req_distinguished_name ]
+countryName                 = Country Name (2 letter code)
+countryName_default         = US
+stateOrProvinceName         = State or Province Name (full name)
+stateOrProvinceName_default = New York
+localityName                = Locality Name (eg, city)
+localityName_default        = Albany
+organizationName            = Organization Name (eg, company)
+organizationName_default    = Kubviz
+commonName                  = Common Name (e.g. server FQDN or YOUR name)
+commonName_max              = 64
+[ req_ext ]
+subjectAltName = @alt_names
+[ v3_ca ]
+subjectAltName = @alt_names
+[ alt_names ]
+DNS.1 = kubviz-client-nats
+DNS.2 = kubviz-client
+DNS.3 = kubviz-agent
+```
+
+**Step-2: Create ca-cert.pem**
+
+```bash
+openssl genrsa -out ca-key.pem 4096
+```
+
+```bash
+openssl req -new -x509 -days 365 -key ca-key.pem -out ca-cert.pem -subj "/C=US/ST=New York/L=Albany/O=Kubviz/CN=KubvizCA"
+```
+
+**Step-3: Create the Server Certificate**
+
+```bash
+openssl genrsa -out server-key.pem 4096
+```
+
+```bash
+openssl req -new -key server-key.pem -out server-csr.pem -subj "/C=US/ST=New York/L=Albany/O=Kubviz/CN=kubviz-client-nats" -config ca-config.cnf -extensions req_ext
+```
+
+```bash
+openssl x509 -req -days 365 -in server-csr.pem -CA ca-cert.pem -CAkey ca-key.pem -set_serial 01 -out server-cert.pem -extfile ca-config.cnf -extensions v3_ca
+```
+
+**Step-4: Create the Client Certificate**
+
+```bash
+openssl genrsa -out client-key.pem 4096
+```
+
+```bash
+openssl req -new -key client-key.pem -out client-csr.pem -subj "/C=US/ST=New York/L=Albany/O=Kubviz/CN=kubviz-client" -config ca-congig.cnf -extensions req_ext
+```
+
+```bash
+openssl x509 -req -days 365 -in client-csr.pem -CA ca-cert.pem -CAkey ca-key.pem -set_serial 02 -out client-cert.pem -extfile ca-config.cnf -extensions v3_ca
+```
+
+**step-5: Create the agent certificate**
+
+```bash
+openssl genrsa -out agent-key.pem 4096
+```
+
+```bash
+openssl req -new -key agent-key.pem -out agent-csr.pem -subj "/C=US/ST=New York/L=Albany/O=Kubviz/CN=kubviz-agent" -config ca-config.cnf -extensions req_ext
+```
+
+```bash
+openssl x509 -req -days 365 -in agent-csr.pem -CA ca-cert.pem -CAkey ca-key.pem -set_serial 02 -out agent-cert.pem -extfile ca-config.cnf -extensions v3_ca
+```
+**step-6: Create secrets**
+
+```bash
+kubectl create secret generic kubviz-client-ca-cert --from-file=client-cert.pem --from-file=client-key.pem --from-file=ca-cert.pem -n kubviz
+```
+
+```bash
+kubectl create secret generic kubviz-agent-ca-cert --from-file=agent-cert.pem --from-file=agent-key.pem --from-file=ca-cert.pem -n kubviz
+```
+
+```bash
+kubectl create secret generic kubviz-server-ca-cert --from-file=server-cert.pem --from-file=server-key.pem --from-file=ca-cert.pem -n kubviz
+```
+
+#### if you want to enable mtls add the secret name in client/values.yaml also mtls.enabled: true
+
+**Step-7: Add the secret name in client/value.yaml**
+
+Below is the nats configuration
+
+```yaml
+tls:
+    secret:
+      name: kubviz-server-ca-cert
+    ca: "ca-cert.pem"
+    cert: "server-cert.pem"
+    key: "server-key.pem"
+    verify: true
+    verify_and_map: true
+...
+```
+
+**Step-8: Add the secret name in client/value.yaml**
+
+```yaml
+mtls:
+  enabled: true
+  secret:
+    name: kubviz-client-ca-cert
+...
+```
+
+**Step-9: Add the secret name in agent/value.yaml**
+
+```yaml
+mtls:
+  enabled: true
+  secret:
+    name: kubviz-agent-ca-cert
+...
+```