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Support variable server pools (#11256)

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Current implementation requires server pools to have
same erasure stripe sizes, to facilitate same SLA
and expectations.

This PR allows server pools to be variadic, i.e they
do not have to be same erasure stripe sizes - instead
they should have SLA for parity ratio.

If the parity ratio cannot be guaranteed by the new
server pool, the deployment is rejected i.e server
pool expansion is not allowed.
This commit is contained in:
Harshavardhana
2021-01-16 12:08:02 -08:00
committed by GitHub
parent 40d59c1961
commit f903cae6ff
26 changed files with 254 additions and 199 deletions
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6
cmd/config-current.go
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@@ -342,7 +342,7 @@ func validateConfig(s config.Config, setDriveCount int) error {
return notify.TestNotificationTargets(GlobalContext, s, NewGatewayHTTPTransport(), globalNotificationSys.ConfiguredTargetIDs())
}
func lookupConfigs(s config.Config, setDriveCount int) {
func lookupConfigs(s config.Config, minSetDriveCount int) {
ctx := GlobalContext
var err error
@@ -429,7 +429,7 @@ func lookupConfigs(s config.Config, setDriveCount int) {
logger.LogIf(ctx, fmt.Errorf("Invalid api configuration: %w", err))
}
globalAPIConfig.init(apiConfig, setDriveCount)
globalAPIConfig.init(apiConfig, minSetDriveCount)
// Initialize remote instance transport once.
getRemoteInstanceTransportOnce.Do(func() {
@@ -437,7 +437,7 @@ func lookupConfigs(s config.Config, setDriveCount int) {
})
if globalIsErasure {
globalStorageClass, err = storageclass.LookupConfig(s[config.StorageClassSubSys][config.Default], setDriveCount)
globalStorageClass, err = storageclass.LookupConfig(s[config.StorageClassSubSys][config.Default], minSetDriveCount)
if err != nil {
logger.LogIf(ctx, fmt.Errorf("Unable to initialize storage class config: %w", err))
}