Problem with access rights on data subdirectory on Windows

[bjornea]

I installed version 2.4.1 for Windows and tried to start the server. It fails with the following error msg:

C:\Programs\prometheus-2.4.1.windows-amd64>prometheus.exe --config.file=prometheus.yml
....
level=error ts=2018-09-20T08:55:41.614057Z caller=main.go:617 err="opening storage failed: list block dirs in "data/": open data/: Access is denied."

Access rights for data directory:
PS C:\Programs\prometheus-2.4.1.windows-amd64> Get-Acl data | fl

Path : Microsoft.PowerShell.Core\FileSystem::C:\Programs\prometheus-2.4.1.windows-amd64\data
Owner : CORP\bal
Group : CORP\Domain Users
Access : NULL SID Deny ReadExtendedAttributes, WriteExtendedAttributes, ExecuteFile, DeleteSubdirectoriesAndFiles, ReadPermissions
BUILTIN\Administrators Allow DeleteSubdirectoriesAndFiles, Write, ReadAndExecute, Synchronize
S-1-99-0 Allow DeleteSubdirectoriesAndFiles, Write, ReadAndExecute, Synchronize
NT AUTHORITY\SYSTEM Allow DeleteSubdirectoriesAndFiles, Write, ReadAndExecute, Synchronize
Audit :
Sddl : O:S-1-5-21-1043938702-3518237282-2318151422-14557G:DUD:(D;OICIID;SWRPWPDTRC;;;S-1-0-0)(A;OICIID;0x1201ff;;;BA)(A;OICIID;0x1201ff;;;S-1-99-0)(A;OICIID;0x1201ff;;;SY)

Listed from MobaXTerm before start:
drwxr-x--- 1 bal UsersGrp 0 Sep 20 10:51 data

after start:
d---rwx--- 1 bal UsersGrp 0 Sep 20 10:46 data

It looks as the server modifies the access rights, possible to safeguard the data directory, but the access right ends up 070 and not 700?

[gouthamve]

Hi, I'm fixing a bunch of things with 2.4.x on Windows, but this doesn't look like any of them. I'm not a Windows user so this is a little alien to me.

Having said that, could you try 2.3.2 and report if the same issue exists there?

[bjornea]

Yes, I can try 2.3.2. I tried 2.3.0 yesterday and it had the same issue.

[bjornea]

C:\Programs\prometheus-2.3.2.windows-amd64>prometheus.exe --config.file=prometheus.yml
level=info ts=2018-09-20T10:27:02.3933269Z caller=main.go:222 msg="Starting Prometheus" version="(version=2.3.2, branch=HEAD, revision=71af5e29e815795e9dd14742ee7725682fa14b7b)"
...
level=error ts=2018-09-20T10:27:02.4517488Z caller=main.go:596 err="Opening storage failed open data/: Access is denied."

It looks the same.

[bjornea]

I got it up and running with this fix.

$ cd prometheus-2.3.2.windows-amd64
$ mv data data1
$ mkdir data
$ chmod 777 data

[gouthamve]

Hi, this should be fixed in 2.4.2 could you try and check?