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https://issues.apache.org/jira/browse/TS-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14486515#comment-14486515
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Bryan Call edited comment on TS-3509 at 4/9/15 1:53 AM:
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It looks like it might be something going on with capabilities:
With 5.0.1:
{code}
[bcall@l2 ~]$ egrep 'cap|uid|dm-4' ~/out
geteuid() = 0
geteuid() = 0
getuid() = 0
setuid(99) = 0
capget(0x20080522, 0, NULL) = -1 EFAULT (Bad address)
capset(0x20080522, 0, {CAP_NET_BIND_SERVICE|CAP_NET_ADMIN|CAP_IPC_LOCK,
CAP_DAC_OVERRIDE|CAP_NET_BIND_SERVICE|CAP_NET_ADMIN|CAP_IPC_LOCK, 0}) = 0
stat("/dev/dm-4", {st_mode=S_IFBLK|0660, st_rdev=makedev(253, 4), ...}) = 0
open("/dev/dm-4", O_RDONLY) = 12
stat("/dev/dm-4", {st_mode=S_IFBLK|0660, st_rdev=makedev(253, 4), ...}) = 0
open("/dev/dm-4", O_RDONLY) = 12
{code}
was (Author: bcall):
It looks like it might be something going on with capabilities:
With 5.0.1:
{code}
[bcall@l2 ~]$ egrep 'setuid|dm-4' ~/out
setuid(99) = 0
stat("/dev/dm-4", {st_mode=S_IFBLK|0660, st_rdev=makedev(253, 4), ...}) = 0
open("/dev/dm-4", O_RDONLY) = 12
stat("/dev/dm-4", {st_mode=S_IFBLK|0660, st_rdev=makedev(253, 4), ...}) = 0
open("/dev/dm-4", O_RDONLY) = 12
open("/dev/dm-4", O_RDWR|O_DSYNC|O_DIRECT) = 376
[bcall@l2 ~]$ ll /dev/dm-4
brw-rw---- 1 root disk 253, 4 Apr 9 01:36 /dev/dm-4
{code}
> Access permissions for storage entries in cache.config changed
> --------------------------------------------------------------
>
> Key: TS-3509
> URL: https://issues.apache.org/jira/browse/TS-3509
> Project: Traffic Server
> Issue Type: Bug
> Components: Cache
> Affects Versions: 5.3.0
> Reporter: Bryan Call
> Priority: Blocker
> Fix For: 5.3.0
>
>
> It looks like 5.3.0 drops from root before opening up the disk storage now:
> {code}
> [Apr 8 23:52:33.227] Server {0x7ff106a86800} DEBUG: (cache_init)
> Store::read_config: "/dev/dm-4"
> [Apr 8 23:52:33.227] Server {0x7ff106a86800} DEBUG: (cache_init)
> Store::read_config - ns = new Span; ns->init("/dev/dm-4",-1), forced volume=-1
> [Apr 8 23:52:33.227] Server {0x7ff106a86800} DEBUG: (cache_init)
> Store::read_config - could not initialize storage "/dev/dm-4" [unable to
> access file]
> [bcall@l1 ~]$ ll /dev/dm-4
> brw-rw---- 1 root disk 253, 4 Apr 8 23:52 /dev/dm-4
> [bcall@l1 ~]$ chmod 666 /dev/dm-4
> {code}
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