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opa bench --data rbactest.rego 'data.rbactest.allow'
+-------------------------------------------------+------------+
| samples | 22605 |
| ns/op | 47760 |
| B/op | 6269 |
| allocs/op | 112 |
| histogram_timer_rego_external_resolve_ns_75% | 400 |
| histogram_timer_rego_external_resolve_ns_90% | 500 |
| histogram_timer_rego_external_resolve_ns_95% | 500 |
| histogram_timer_rego_external_resolve_ns_99% | 871 |
| histogram_timer_rego_external_resolve_ns_99.9% | 29394 |
| histogram_timer_rego_external_resolve_ns_99.99% | 29800 |
| histogram_timer_rego_external_resolve_ns_count | 22605 |
| histogram_timer_rego_external_resolve_ns_max | 29800 |
| histogram_timer_rego_external_resolve_ns_mean | 434 |
| histogram_timer_rego_external_resolve_ns_median | 400 |
| histogram_timer_rego_external_resolve_ns_min | 200 |
| histogram_timer_rego_external_resolve_ns_stddev | 1045 |
| histogram_timer_rego_query_eval_ns_75% | 31100 |
| histogram_timer_rego_query_eval_ns_90% | 37210 |
| histogram_timer_rego_query_eval_ns_95% | 47160 |
| histogram_timer_rego_query_eval_ns_99% | 91606 |
| histogram_timer_rego_query_eval_ns_99.9% | 630561 |
| histogram_timer_rego_query_eval_ns_99.99% | 631300 |
| histogram_timer_rego_query_eval_ns_count | 22605 |
| histogram_timer_rego_query_eval_ns_max | 631300 |
| histogram_timer_rego_query_eval_ns_mean | 29182 |
| histogram_timer_rego_query_eval_ns_median | 25300 |
| histogram_timer_rego_query_eval_ns_min | 15200 |
| histogram_timer_rego_query_eval_ns_stddev | 32411 |
+-------------------------------------------------+------------+

OPA Sidecar injection

First create a namespace for your apps and enable istio and opa 

kubectl create ns opa
kubectl label namespace opa opa-istio-injection="enabled"
kubectl label namespace opa istio-injection="enabled"

Create the opa injection obects using:

kubectl create -f opa_inject.yaml

Ensure your istio mesh config has been setup to include grcp local authorizer

kubectl edit configmap istio -n istio-system

    extensionProviders:
    - envoyExtAuthzGrpc:
        port: "9191"
        service: local-opa-grpc.local
      name: opa-local

Update your rapp-provider authorization policy to use this provider:

apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: rapp-opa-provider-opa
  namespace: opa
spec:
  selector:
    matchLabels:
      app: rapp-opa-provider
  action: CUSTOM
  provider:
    name: "opa-local"
  rules:
  - to:
    - operation:
        paths: ["/rapp-opa-provider"]
        notPaths: ["/health"]

Run the opa_test.sh script above and you should see a message confirming your connection to the service.

Note: References to keycloak need to be updated to include the keycloak schema i.e keycloak.default

Basic Authentication

We can add basic authentication to our NGINX bubdle server by following these steps:

Create a password file using the following command:   sudo htpasswd -c .htpasswd <user>, you will be prompted to input the password.

This will produce a file called .htpasswd containing the username and encrypted password

e.g. admin:$apr1$tPQCjrVW$sokcSj4QVkncEDna0Fc2o/

Add the following configmap definitions to your nginx.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-pwd-config
  namespace: default
data:
  .htpasswd: |
    admin:$apr1$tPQCjrVW$sokcSj4QVkncEDna0Fc2o/
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-conf-config
  namespace: default
data:
  default.conf: |
   server {
           server_name localhost;

           location ~ ^/bundles/(.*)$ {
           root /usr/share/nginx/html/bundles;
           try_files /$1 =404;
           auth_basic "Restricted";
           auth_basic_user_file /etc/nginx/conf.d/conf/.htpasswd;
           }
   }
---

Then update your volumes and volume mounts to include these files with your deployment

        volumeMounts:
        - name: bundlesdir
          mountPath: /usr/share/nginx/html/bundles
          readOnly: true
        - name: nginx-conf
          mountPath: /etc/nginx/conf.d/default.conf
          subPath: default.conf
        - name: nginx-pwd
          mountPath: /etc/nginx/conf.d/conf/.htpasswd
          subPath: .htpasswd
      volumes:
      - name: bundlesdir
        hostPath:
          # Ensure the file directory is created.
           path: /var/opa/bundles
           type: DirectoryOrCreate
      - name: nginx-conf
        configMap:
          name: nginx-conf-config
          defaultMode: 0644
      - name: nginx-pwd
        configMap:
          name: nginx-pwd-config
          defaultMode: 0644

This will add basic authentication to your bundles directory.

Run echo -n <username>:<password> | base64 to encrpt your usename and password

e.g. echo -n admin:admin | base64
YWRtaW46YWRtaW4=

Update the opa-istio-config ConfigMap in the opa_inject.yaml file to include the encrypted string as a token in the cedentials section:

apiVersion: v1
kind: ConfigMap
metadata:
  name: opa-istio-config
  namespace: opa
data:
  config.yaml: |
    plugins:
      envoy_ext_authz_grpc:
        addr: :9191
        path: policy/ingress/allow
    decision_logs:
      console: true
    services:
      - name: bundle-server
        url: http://bundle-server.default
        credentials:
          bearer:
            token: YWRtaW46YWRtaW4=
            scheme: Basic

    bundles:
      authz:
        service: bundle-server
        resource: bundles/opa-bundle.tar.gz
        persist: true
        polling:
          min_delay_seconds: 10
          max_delay_seconds: 20
---

Your bundle is now protected with basic authentication.