Configure Ingress for external routing
Configure an ingress controller to access your Redis Enterprise databases from outside the Kubernetes cluster.
Prerequisites
Before creating an Ingress, you'll need:
- A RedisEnterpriseDatabase (REDB) with TLS enabled for client connections
- A supported Ingress controller with
ssl-passthrough
enabled- Ingress-NGINX Controller
- Be sure to use the
kubernetes/ingress-nginx
controller and NOT thenginxinc/kubernetes-ingress
controller.
- Be sure to use the
- HAProxy Ingress
- To use Istio for your Ingress resources, see Configure Istio for external routing
- Ingress-NGINX Controller
ssl-passthrough
enabled. This is enabled by default for HAProxy, but disabled by default for NGINX. See the NGINX User Guide for details.Create an Ingress resource
-
Retrieve the hostname of your Ingress controller's
LoadBalancer
service.$ kubectl get svc <haproxy-ingress | ingress-ngnix-controller> \ -n <ingress-ctrl-namespace>
Below is example output for an HAProxy running on a K8s cluster hosted by AWS.
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE haproxy-ingress LoadBalancer 10.43.62.53 a56e24df8c6173b79a63d5da54fd9cff-676486416.us-east-1.elb.amazonaws.com 80:30610/TCP,443:31597/TCP 21m
-
Choose the hostname you will use to access your database (this value will be represented in this article with
<my-db-hostname>
). -
Create a DNS entry that resolves your chosen database hostname to the IP address for the Ingress controller's LoadBalancer.
-
Create the Ingress resource YAML file.
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: rec-ingress annotations: <controller-specific-annotations-below> spec: rules: - host: <my-db-hostname> http: paths: - path: / pathType: ImplementationSpecific backend: service: name: <db-name> port: name: redis
For HAProxy, insert the following into the
annotations
section:kubernetes.io/ingress.class: haproxy ingress.kubernetes.io/ssl-passthrough: "true"
For NGINX, insert the following into the
annotations
section:kubernetes.io/ingress.class: nginx nginx.ingress.kubernetes.io/ssl-passthrough: "true"
The
ssl-passthrough
annotation is required to allow access to the database. The specific format changes depending on your Ingress controller and any additional customizations. See NGINX Configuration annotations and HAProxy Ingress Options for updated annotation formats.
Test your external access
To test your external access to the database, you need a client that supports TLS and SNI.
Test your access with Openssl
-
Get the default CA certificate from the
redis-enterprise-node
container on any of the Redis Enterprise pods.$ kubectl exec -it <pod-name> -c redis-enterprise-node \ -- cat /etc/opt/redislabs/proxy_cert.pem
-
Run the following
openssl
command, substituting your own values for<my-db-hostname>
.$ openssl s_client \ -connect <my-db-hostname>:443 \ -crlf -CAfile ./proxy_cert.pem \ -servername <my-db-hostname>
If you are connected to the database, you will receive
PONG
back, as shown below:... Verify return code: 0 (ok) --- PING +PONG
Test your access with Python
You can use the code below to test your access with Python, substituting your own values for <my-db-hostname>
and <file-path>
.
import redis
r = redis.StrictRedis(host='<my-db-hostname>',
port=443, db=0, ssl=True,
ssl_ca_certs='/<file-path>/proxy_cert.pem')
print(r.info())
Your output should look something like this:
$ /Users/example-user/Documents/Projects/test_client/venv3.7/bin/python \
/Users/example-user/Documents/Projects/test_client/test_ssl.py
{
'redis_version': '5.0.5',
'redis_git_sha1': 0,
'redis_git_dirty': 0,
'redis_build_id': 0,
'redis_mode': 'standalone',
'os': 'Linux 4.14.154-128.181.amzn2.x86_64 x86_64',
'arch_bits': 64,
'multiplexing_api': 'epoll',
'gcc_version': '7.4.0',
'process_id': 1,
'run_id': '3ce7721b096517057d28791aab555ed8ac02e1de',
'tcp_port': 10811,
'uptime_in_seconds': 316467,
'uptime_in_days': 3,
'hz': 10,
'lru_clock': 0,
'config_file': '',
'connected_clients': 1,
'client_longest_output_list': 0,
'client_biggest_input_buf': 0,
'blocked_clients': 0,
'used_memory': 12680016,
'used_memory_human': '12.9M',
'used_memory_rss': 12680016,
'used_memory_peak': 13452496,
'used_memory_peak_human': '12.82M',
'used_memory_lua': 151552,
'mem_fragmentation_ratio': 1,
'mem_allocator': 'jemalloc-5.1.0',
'loading': 0,
'rdb_changes_since_last_save': 0,
'rdb_bgsave_in_progress': 0,
'rdb_last_save_time': 1577753916,
'rdb_last_bgsave_status': 'ok',
'rdb_last_bgsave_time_sec': 0,
'rdb_current_bgsave_time_sec': -1,
'aof_enabled': 0,
'aof_rewrite_in_progress': 0,
'aof_rewrite_scheduled': 0,
'aof_last_rewrite_time_sec': -1,
'aof_current_rewrite_time_sec': -1,
'aof_last_bgrewrite_status': 'ok',
'aof_last_write_status': 'ok',
'total_connections_received': 4,
'total_commands_processed': 6,
'instantaneous_ops_per_sec': 14,
'total_net_input_bytes': 0,
'total_net_output_bytes': 0,
'instantaneous_input_kbps': 0.0,
'instantaneous_output_kbps': 0.0,
'rejected_connections': 0,
'sync_full': 1,
'sync_partial_ok': 0,
'sync_partial_err': 0,
'expired_keys': 0,
'evicted_keys': 0,
'keyspace_hits': 0,
'keyspace_misses': 0,
'pubsub_channels': 0,
'pubsub_patterns': 0,
'latest_fork_usec': 0,
'migrate_cached_sockets': 0,
'role': 'master',
'connected_slaves': 1,
'slave0': {
'ip': '0.0.0.0',
'port': 0,
'state': 'online',
'offset': 0,
'lag': 0
},
'master_repl_offset': 0,
'repl_backlog_active': 0,
'repl_backlog_size': 1048576,
'repl_backlog_first_byte_offset': 0,
'repl_backlog_histlen': 0,
'used_cpu_sys': 0.0,
'used_cpu_user': 0.0,
'used_cpu_sys_children': 0.0,
'used_cpu_user_children': 0.0,
'cluster_enabled': 0
}
Process finished with exit code 0