I would like to follow up on a previous thread. I have here 3 machines running Ubuntu. All were running 14.04 LTS and of these two have been upgraded to 16.04. They all run QEMU with a shared GlusterFS mount for storing VM images. Libgfapi was configured and running on all hosts with 14.04 but has stopped recently with 16.04.
I can see exactly the same problems as mentioned here on the 16.04 machines, with these packages:
ii glusterfs-client 3.7.14-ubuntu1~xenial1 amd64 clustered file-system (client package)
ii glusterfs-common 3.7.14-ubuntu1~xenial1 amd64 GlusterFS common libraries and translator modules
ii glusterfs-server 3.7.14-ubuntu1~xenial1 amd64 clustered file-system (server package)
ii qemu-block-extra:amd64 1:2.5+dfsg-5ubuntu10.2glusterfs3.7.14xenial1 amd64 extra block backend modules for qemu-system and qemu-utils
ii qemu-kvm 1:2.5+dfsg-5ubuntu10.2glusterfs3.7.14xenial1 amd64 QEMU Full virtualization
ii qemu-system-common 1:2.5+dfsg-5ubuntu10.2glusterfs3.7.14xenial1 amd64 QEMU full system emulation binaries (common files)
ii qemu-system-x86 1:2.5+dfsg-5ubuntu10.2glusterfs3.7.14xenial1 amd64 QEMU full system emulation binaries (x86)
ii qemu-utils 1:2.5+dfsg-5ubuntu10.2glusterfs3.7.14xenial1 amd64 QEMU utilities
Packages on the 14.04 instance:
ii glusterfs-client 3.7.13-ubuntu1~trusty1 amd64 clustered file-system (client package)
ii glusterfs-common 3.7.13-ubuntu1~trusty1 amd64 GlusterFS common libraries and translator modules
ii glusterfs-server 3.7.13-ubuntu1~trusty1 amd64 clustered file-system (server package)
ii qemu-common 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 all dummy transitional package from qemu-common to qemu-keymaps
ii qemu-keymaps 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 all QEMU keyboard maps
ii qemu-kvm 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 amd64 QEMU Full virtualization
ii qemu-system-common 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 amd64 QEMU full system emulation binaries (common files)
ii qemu-system-x86 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 amd64 QEMU full system emulation binaries (x86)
ii qemu-utils 2.0.0+dfsg-2ubuntu1.24glusterfs3.7.12trusty1 amd64 QEMU utilities
As you can see I am using Andre (monotek)'s packages to employ the Gluster protocol in QEMU under Ubuntu (not compiled by default). The versions of Gluster are similar and have indeed been identical in my prior testing. The relevant volume options were set, apparmour rules were added and the setup worked without issue serving block devices over libgfapi for 10+ VMs. However on upgrading to 16.04 there are issues relating to QEMU being unable to access the Gluster volume file when starting a VM. I can use qemu-img to create a blank file using the Gluster profocol but I cannot then start a VM using that file.
Error message:
[MSGID: 104007] [glfs-mgmt.c:637:glfs_mgmt_getspec_cbk] 0-glfs-mgmt: failed to fetch volume file (key:VM) [Invalid argument] [2016-08-20 11:28:02.985483] E [MSGID: 104024] [glfs-mgmt.c:738:mgmt_rpc_notify] 0-glfs-mgmt: failed to connect with remote-host: 127.0.0.1 (Permission denied) [Permission denied] 2016-08-20T11:28:03.979968Z qemu-system-x86_64: -drive file=gluster://127.0.0.1/VM/vm1.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,cache=none: Gluster connection failed for server=127.0.0.1 port=0 volume=VM image=vm1.qcow2 transport=tcp: Permission denied
Any assistance on changes to permissions or apparmour in 16.04 would be greatly appreciated.
thanks
Stephen
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