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Description of problem:
I have xmls for lxc virtual containers under /var/lib/libvirt/lxc which seems
the right place to store them. With selinux set to enforce it seems that
VirtualDomain resource agent cannot read it (Permission denied).
Version-Release number of selected component (if applicable):
resource-agents-3.9.5-26.el7.x86_64
How reproducible: always
Steps to Reproduce:
1. set selinux to enforcing
2. create lxc xml in /var/lib/libvirt/lxc directory
3. run 'restorecon -R /var/lib/libvirt/lxc'
4. create pacemaker VirtualDomain resource for this container
5. try to enable it
Actual results: resource not started
Expected results: resource starting corretly
Additional info:
The container itself runs fine but there is a problem of pacemaker accessing
the xml definition of container. Please advice on how to make this properly
work with selinux set to enforcing.
# grep lrmd /var/log/messages | tail
...
Apr 1 15:53:59 duck-03 lrmd[21697]: notice: operation_finished: R-duck-03-node01-qemu_stop_0:12640:stderr [ error: internal error: unexpected qemu uri path '/', try qemu:///system ]
Apr 1 15:53:59 duck-03 crmd[13292]: warning: do_update_resource: Resource R-duck-03-node01-qemu no longer exists in the lrmd
Apr 1 15:55:45 duck-03 lrmd[21697]: notice: operation_finished: R-duck-03-node01-lxc_stop_0:5012:stderr [ domain duck-03-node01 destroyed ]
Apr 1 15:56:39 duck-03 lrmd[21697]: notice: operation_finished: R-duck-03-node01-lxc_start_0:5393:stderr [ error: Failed to open file '/var/lib/libvirt/lxc/duck-03-node01.xml'
# ls -lZ /var/lib/libvirt
drwx--x--x. root root system_u:object_r:virt_content_t:s0 boot
drwxr-xr-x. root root system_u:object_r:virt_var_lib_t:s0 dnsmasq
drwx--x--x. root root system_u:object_r:virt_var_lib_t:s0 filesystems
drwxr-xr-x. root root system_u:object_r:virt_image_t:s0 images
drwx------. root root system_u:object_r:virt_var_lib_t:s0 lxc
drwx------. root root system_u:object_r:virt_var_lib_t:s0 network
drwxr-x---. qemu qemu system_u:object_r:qemu_var_run_t:s0 qemu
# ls -lZ /var/lib/libvirt/lxc/duck-03-node01.xml
lrwxrwxrwx. root root unconfined_u:object_r:virt_var_lib_t:s0 /var/lib/libvirt/lxc/duck-03-node01.xml -> /var/lib/libvirt/lxc/duck-03-node01/duck-03-node01.xml
# ls -lZ /var/lib/libvirt/lxc/duck-03-node01/duck-03-node01.xml
-rw-r--r--. root root unconfined_u:object_r:virt_var_lib_t:s0 /var/lib/libvirt/lxc/duck-03-node01/duck-03-node01.xml
# ls -Zl /usr/lib/ocf/resource.d/heartbeat/VirtualDomain
-rwxr-xr-x. 1 system_u:object_r:bin_t:s0 root root 21799 Mar 28 12:24 /usr/lib/ocf/resource.d/heartbeat/VirtualDomain
This is a selinux policy problem. I don't think there is anything we should be doing from the VirtualDomain resource to attempt to solve this.
-- Vossel