Since relaxing quorum the error across pools
for ListBuckets(), GetBucketInfo() we hit a
situation where loading IAM could potentially
return an error for second pool that server
is not initialized.
We need to handle this, let the pool come online
and retry transparently - this PR fixes that.
This helps reduce disk operations as these periodic routines would not
run concurrently any more.
Also add expired STS purging periodic operation: Since we do not scan
the on-disk STS credentials (and instead only load them on-demand) a
separate routine is needed to purge expired credentials from storage.
Currently this runs about a quarter as often as IAM refresh.
Also fix a bug where with etcd, STS accounts could get loaded into the
iamUsersMap instead of the iamSTSAccountsMap.
In situations with large number of STS credentials on disk, IAM load
time is high. To mitigate this, STS accounts will now be loaded into
memory only on demand - i.e. when the credential is used.
In each IAM cache (re)load we skip loading STS credentials and STS
policy mappings into memory. Since STS accounts only expire and cannot
be deleted, there is no risk of invalid credentials being reused,
because credential validity is checked when it is used.
For policy attach/detach API to work correctly the server should hold a
lock before reading existing policy mapping and until after writing the
updated policy mapping. This is fixed in this change.
A site replication bug, where LDAP policy attach/detach were not
correctly propagated is also fixed in this change.
Bonus: Additionally, the server responds with the actual (or net)
changes performed in the attach/detach API call. For e.g. if a user
already has policy A applied, and a call to attach policies A and B is
performed, the server will respond that B was attached successfully.
```
commit 7bdaf9bc50
Author: Aditya Manthramurthy <donatello@users.noreply.github.com>
Date: Wed Jul 24 17:34:23 2019 -0700
Update on-disk storage format for users system (#7949)
```
Bonus: fixes a bug when etcd keys were being re-encrypted.
"consoleAdmin" was used as the policy for root derived accounts, but this
lead to unexpected bugs when an administrator modified the consoleAdmin
policy
This change avoids evaluating a policy for root derived accounts as by
default no policy is mapped to the root user. If a session policy is
attached to a root derived account, it will be evaluated as expected.
Main motivation is move towards a common backend format
for all different types of modes in MinIO, allowing for
a simpler code and predictable behavior across all features.
This PR also brings features such as versioning, replication,
transitioning to single drive setups.
- Adds an STS API `AssumeRoleWithCustomToken` that can be used to
authenticate via the Id. Mgmt. Plugin.
- Adds a sample identity manager plugin implementation
- Add doc for plugin and STS API
- Add an example program using go SDK for AssumeRoleWithCustomToken
If LDAP is enabled, STS security token policy is evaluated using a
different code path and expects ldapUser claim to exist in the security
token. This means other STS temporary accounts generated by any Assume
Role function, such as AssumeRoleWithCertificate, won't be allowed to do any
operation as these accounts do not have LDAP user claim.
Since IsAllowedLDAPSTS() is similar to IsAllowedSTS(), this commit will
merge both.
Non harmful changes:
- IsAllowed for LDAP will start supporting RoleARN claim
- IsAllowed for LDAP will not check for parent claim anymore. This check doesn't
seem to be useful since all STS login compare access/secret/security-token
with the one saved in the disk.
- LDAP will support $username condition in policy documents.
Co-authored-by: Anis Elleuch <anis@min.io>
Co-authored-by: Aditya Manthramurthy <donatello@users.noreply.github.com>
anything that is stuck on the disk today can cause latency
spikes for all incoming S3 I/O, we need to have this
de-coupled so that we can make sure that latency in loading
credentials are not reflected back to the S3 API calls.
The approach this PR takes is by checking if the calls were
updated just in case when the IAM load was in progress,
so that we can use merge instead of "replacement" to avoid
missing state.
