Device Cache Warmup
Overview
The Unified Assurance Device Cache Warmup microservice is part of the microservice event pipeline. It preloads devices from a set of zones into redis. It runs once as a sidecar when first installing redis, and subsequent runs are not required.
Prerequisites
-
A microservices cluster must be setup. Refer to Microservice Cluster Setup.
-
Redis must be installed. Refer to Redis microservice.
Setup
su - assure1
export NAMESPACE=a1-zone1-pri
export WEBFQDN=<Primary Presentation Web FQDN>
a1helm install device-cache-warmup assure1/device-cache-warmup -n $NAMESPACE --set global.imageRegistry=$WEBFQDN
Default Configuration
| Name | Value | Possible Values | Notes |
|---|---|---|---|
| LOG_LEVEL | INFO | FATAL, ERROR, WARN, INFO, DEBUG | Logging level used by application. |
| STREAM_INPUT | mysql:///Devices | Text, 255 characters | MySQL connection URI. |
| STREAM_OUTPUT | redis://redis-master.a1-zone1-pri.svc.cluster.local:6379 | Text, 255 characters | Redis server hostname and port. |
| CACHE_TTL | "21600" | Number | The TTL in seconds set on each record in the cache. |
| BATCH_SIZE | "20000" | Number | The amount of records to read at once during the warmup. Higher batch sizes will utilize more resources but lower the total processing time. |
| ZONES | "1" | Text, 255 characters | A comma separated list of zones. All zones are preloaded if an empty string is set. |
Configurations can be changed by passing the values to the a1helm install prefixed with the configData parent key.
Example of setting the log level to DEBUG
a1helm install ... --set configData.LOG_LEVEL=DEBUG
Example of loading all zones
a1helm install device-cache-warmup assure1/device-cache-warmup -n $NAMESPACE --set global.imageRegistry=$WEBFQDN --set-string configData.ZONES=""
Example of loading zone id 2
a1helm install device-cache-warmup assure1/device-cache-warmup -n $NAMESPACE --set global.imageRegistry=$WEBFQDN --set-string configData.ZONES="2"
Example of loading zone ids 1, 2, 3, 4
a1helm install device-cache-warmup assure1/device-cache-warmup -n $NAMESPACE --set global.imageRegistry=$WEBFQDN --set-string configData.ZONES="1\,2\,3\,4"