Redis¶

Servala provides fully managed Redis instances: a high-performance, open-source in-memory data store commonly used for caching, session management, and message queuing.

Availability¶

Redis is available on selected cloud providers and zones. See the availability matrix for the current list.

Supported versions¶

We are working on providing newer and more up-to-date versions.

Version upgrade mechanics are described in Maintenance & Upgrades.

Compute plan and sizing¶

Compute resources (CPU, memory, and storage) are selected through the compute plan when you provision the instance. The available plans and their sizes are shown directly in the portal, so they are not duplicated here. See Compute Plans & SLAs for how plans and service levels work.

Configuration options¶

Service-specific parameters available when provisioning, in addition to the compute plan:

• Redis version: select the version (see Supported versions)

• Instance Size: controls replication. Only two values are supported:

  • 1: a single instance with no replica
  • 3: one master and two replicas, which provides high availability through replication

  Setting the instance size to 3 provisions three instances instead of one, so it has cost implications.

Limits & quotas¶

• Connection limits: to be filled in

Connecting to your instance¶

Redis is accessed over TCP, so you choose a network access mode (shared TCP Gateway or dedicated Load Balancer) when you provision the instance. This determines the hostname and port you connect to.

After provisioning, retrieve your connection credentials from the instance detail page. Connections are TLS-encrypted, so you must provide the TLS certificate, key, and CA certificate in addition to the password. Save these to files (for example ca.crt, cert.crt, and key.key) and reference them with any Redis client:

redis-cli -h <hostname> -p <port> -a <password> --tls --cacert ca.crt --cert cert.crt --key key.key

Or use a connection string:

rediss://<username>:<password>@<hostname>:<port>

Note the rediss:// scheme (with double s) which indicates TLS. When using a connection string, configure your client to present the TLS certificate and key and to trust the CA certificate.

Capability matrix¶

How the managed-service features apply to Redis:

Limitations & known issues¶

• Redis Cluster mode may not be available on all offerings
• Some Redis modules may not be available

Further reading¶

• Redis on servala.com
• Redis upstream documentation