Upgrading Redis for PCF
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This section contains the upgrade procedure and upgrade paths for Redis for PCF.
Consider the following compatibility information before upgrading Redis for PCF.
For more information, see the Product Version Matrix.
|Ops Manager Version||Supported Upgrades for Redis Installations|
|v1.5.x, v1.6.x||v1.4.0 – v1.4.3||v1.4.4 – latest v1.4.x|
|v1.5.0 – v1.5.7|
|v1.4.4 – latest v1.4.x||Next v1.4.x – latest v1.4.x|
|v1.5.0 – latest v1.5.x|
|v1.5.0 – latest v1.5.x||Next v1.5.x – latest v1.5.x|
|v1.7.x||v1.5.0 – latest version||v1.5.1 – latest version|
|v1.8.x||v1.5.17 – latest version||v1.6.0 – latest version|
|v1.9.x – latest version||v1.6.0 – latest version||v1.8.0 – latest version|
|v1.10.0 – v1.10.2||v1.7.2 – latest version||v1.8.0 – latest version|
|v1.10.9 – latest version||v1.7.2 – latest version||v1.9.0 – latest version|
|v1.11.x||v1.9.0 – latest version||1.10.0 – latest version|
|v1.12.x||v1.10.0 – latest version|
This product enables a reliable upgrade experience between versions of the product that is deployed through Ops Manager.
For information on the upgrade paths for each released version, see the above table.
To upgrade Redis for PCF, do the following:
- Download the latest version of the product from Pivotal Network.
- Upload the new
.pivotalfile to Ops Manager.
- If required, upload the stemcell associated with the update.
- If required, update any new mandatory configuration parameters.
- Click Apply changes. The rest of the process is automated.
During the upgrade deployment each Redis instance experiences a small period of downtime as each Redis instance is updated with the new software components. This downtime is because the Redis instances are single VMs operating in a non HA setup.
The length of the downtime depends on whether there is a stemcell update to replace the operating system image, or whether the existing VM can simply have the redis software updated. Stemcell updates incur additional downtime while the IaaS creates the new VM, whereas updates without a stemcell update are faster.
Ops Manager ensures the instances are updated with the new packages and any configuration changes are applied automatically.
Upgrading to a newer version of the product does not cause any loss of data or configuration.
A redeploy causes downtime of the Redis for PCF tile. This section clarifies what events trigger a redeploy.
In Ops Manager, any field that changes the manifest causes a redeploy of the Redis for PCF tile.
In the Pivotal Application Service (PAS) or Elastic Runtime, changes to any of the following properties can trigger downtime:
..cf.consul_server.ips—Consul Server Resource Config
$runtime.system_domain—Runtime System Domain
..cf.ha_proxy.skip_cert_verify.value—Disable SSL certificate verification for this environment in PAS (or Elastic Runtime)
$runtime.apps_domain—Runtime Apps Domain
..cf.nats.ips—NATS Resource Config
$self.service_network—Service Networks in Ops Manager
When the operator applies any of the above changes to PAS (or Elastic Runtime), downtime is triggered for the following:
Redis On-Demand Broker in Redis for PCF v1.8 and later
Dedicated-VM and Shared-VM Services in Redis for PCF v1.9 and earlier
For Redis for PCF v1.8 and later, downtime for service instances occurs only after the operator runs the
upgrade-all-service-instancesBOSH errand, after all tile upgrades are completed successfully.
Any change to a field on the Redis for PCF tile causes BOSH to redeploy both the legacy and the On-Demand Redis Brokers after the operator runs the
Pivotal recommends to never change the network that a pre-existing dedicated-vm deployment works with. If the network is changed, existing dedicated-vm instances will have their bindings stop working with new applications able to bind to the existing instance that contains data.
If the services-subnet CIDR range is changed for a tile, existing applications using On-Demand Redis instances will have to unbind and rebind their application to their instance.
When a new version of Redis is released, Pivotal aims to release a new version of Redis for PCF containing the new Redis version soon after.
When a new version of Redis or another dependent software component, such as the stemcell, is released due to a critical CVE, Pivotal’s goal is to release a new version of the Redis for PCF within 48 hours.