butler Helm values reference

Helm values reference table for the butler application.

Key	Type	Default	Description
affinity	object	{}	Affinity rules for the butler deployment pod
autoscaling.enabled	bool	true	Enable autoscaling of butler deployment
autoscaling.maxReplicas	int	10	Maximum number of butler deployment pods Each replica can have 40 database connections, so we need to make sure the combined connections are under the postgres connection limit. (Which is configurable, but currently set to 400 at the IDF.)
autoscaling.minReplicas	int	1	Minimum number of butler deployment pods
autoscaling.targetCPUUtilizationPercentage	int	25	Target CPU utilization of butler deployment pods Butler CPU usage is very low in normal operation because most things are I/O bound. CPU usage can start creeping up if we have many queries running simultaneously (due to serialization overhead and spatial postprocessing.) In this case the thread pool and database connection pool are probably oversubscribed long before we hit 100% cpu usage, so we want to get more replicas up at fairly low CPU usage.
config.additionalS3EndpointUrls	object	No additional URLs	Endpoint URLs for additional S3 services used by the Butler, as a mapping from profile name to URL.
config.dp02ClientServerIsDefault	bool	false	True if the ‘dp02’ Butler repository alias should use client/server Butler. False if it should use DirectButler.
config.dp02PostgresUri	string	No configuration file for DP02 will be generated.	Postgres connection string pointing to the registry database hosting Data Preview 0.2 data.
config.pathPrefix	string	"/api/butler"	The prefix of the path portion of the URL where the Butler service will be exposed. For example, if the service should be exposed at https://data.lsst.cloud/api/butler, this should be set to /api/butler
config.pguser	string	Use values specified in per-repository Butler config files.	Postgres username used to connect to the Butler DB
config.repositories	object	{}	Mapping from Butler repository label to Butler configuration URI for repositories which will be hosted by this server.
config.s3EndpointUrl	string	""	URL for the primary S3 service where files for datasets are stored by Butler.
global.baseUrl	string	Set by Argo CD	Base URL for the environment
global.host	string	Set by Argo CD	Host name for ingress
global.vaultSecretsPath	string	Set by Argo CD	Base path for Vault secrets
image.pullPolicy	string	"IfNotPresent"	Pull policy for the butler image
image.repository	string	"ghcr.io/lsst/daf_butler"	Image to use in the butler deployment
image.tag	string	""	Overrides the image tag whose default is the chart appVersion.
ingress.annotations	object	{}	Additional annotations for the ingress rule
nodeSelector	object	{}	Node selection rules for the butler deployment pod
podAnnotations	object	{}	Annotations for the butler deployment pod
replicaCount	int	1	Number of web deployment pods to start
resources	object	see values.yaml	Resource limits and requests for the butler deployment pod
tolerations	list	[]	Tolerations for the butler deployment pod