Well, I tried to debug.
I copy created ploop template to CentOS7, create a container, then gdb
vzctl start 101
With gdb, I found error occured in libvzctl, part of the stack is bellow
#0 write_data (path=path@entry=0x7fffffff9b90
"/sys/fs/cgroup/ve/101/ve.state", data=data@entry=0x7ffff7066cfc "START")
at cgroup.c:161
#1 0x00007ffff7029376 in cg_set_param (ctid=ctid@entry=0x621e70 "101",
subsys=subsys@entry=0x7ffff706aa6d "ve", name=name@entry=0x7ffff7066d02
"ve.s
tate", data=data@entry=0x7ffff7066cfc "START") at cgroup.c:235
#2 0x00007ffff703ba6d in start_container (h=0x621e70) at env_nsops.c:199
#3 real_ns_env_create (arg=0x7fffffffad40) at env_nsops.c:215
#4 0x00007ffff6d4f1ad in clone () from /lib64/libc.so.6
this thread is cloned from vzctl
>From the source code, I can find in lib/cgroup.c function write_data
line 161
here is "fd = open(path, O_WRONLY);"
So what on earth makes this "open" Permission Denied, what should I debug
next ?
2015-08-19 3:00 GMT+08:00 <users-requ...@openvz.org>:
> Send Users mailing list submissions to
> users@openvz.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> https://lists.openvz.org/mailman/listinfo/users
> or, via email, send a message with subject or body 'help' to
> users-requ...@openvz.org
>
> You can reach the person managing the list at
> users-ow...@openvz.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Users digest..."
>
>
> Today's Topics:
>
> 1. Can't open /sys/fs/cgroup/ve/$UUID/ve.state for writing:
> Permission denied (Alkaid)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 18 Aug 2015 16:53:12 +0800
> From: Alkaid <zgf574564...@gmail.com>
> To: users@openvz.org
> Subject: [Users] Can't open /sys/fs/cgroup/ve/$UUID/ve.state for
> writing: Permission denied
> Message-ID:
> <
> cajfqjcm8u-5f23ehhc3okqhp_dgot+lh6xa-d0qfmyiet9j...@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I am using Centos7+vzkernel+...
> When creating ostemplate, it always creates an temporary container to
> download and install packages. But vzctl can't open ve.state with O_WRONLY,
> result is EACCES ( Permission denied).
> cmd: vzpkg create cache centos-6-x86_64, full log is in the attachment
>
> I found an issue on bugs.openvz.org (
> https://bugs.openvz.org/browse/OVZ-6304),
> I wonder why it was treated as "Feature Request" and a "Userspace" problem.
>
> On the same time, everything works fine in the cloudlinux, they have nearly
> the same environment
> kernel 3.10.0-123.1.2.vz7.5.29
> vzctl v.7.0.60-1.vz7
> libvzctl-7.0.89-1.1.vz7.x86_64
> vztt-7.0.22-1.vz7.x86_64
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://lists.openvz.org/pipermail/users/attachments/20150818/6ca30776/attachment-0001.html
> >
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: stdout
> Type: application/octet-stream
> Size: 2468 bytes
> Desc: not available
> URL: <
> http://lists.openvz.org/pipermail/users/attachments/20150818/6ca30776/attachment-0001.obj
> >
>
> ------------------------------
>
> _______________________________________________
> Users mailing list
> Users@openvz.org
> https://lists.openvz.org/mailman/listinfo/users
>
>
> End of Users Digest, Vol 118, Issue 15
> **************************************
>
_______________________________________________
Users mailing list
Users@openvz.org
https://lists.openvz.org/mailman/listinfo/users
