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Bring in safe mode support (#8478)

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This PR refactors object layer handling such
that upon failure in sub-system initialization
server reaches a stage of safe-mode operation
wherein only certain API operations are enabled
and available.

This allows for fixing many scenarios such as

 - incorrect configuration in vault, etcd,
   notification targets
 - missing files, incomplete config migrations
   unable to read encrypted content etc
 - any other issues related to notification,
   policies, lifecycle etc
This commit is contained in:
Harshavardhana
2019-11-09 09:27:23 -08:00
committed by kannappanr
parent 1c90a6bd49
commit 822eb5ddc7
41 changed files with 1129 additions and 830 deletions
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5
cmd/config/config.go
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@@ -386,11 +386,6 @@ func (c Config) SetKVS(s string, defaultKVS map[string]KVS) error {
return Error(fmt.Sprintf("invalid number of arguments %s", s))
}
if subSystemValue[0] == CredentialsSubSys {
return Error(fmt.Sprintf("changing '%s' sub-system values is not allowed, use ENVs instead",
subSystemValue[0]))
}
if !SubSystems.Contains(subSystemValue[0]) {
return Error(fmt.Sprintf("unknown sub-system %s", s))
}