diff options
Diffstat (limited to 'remote/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/setup_image_access.inc')
| -rw-r--r-- | remote/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/setup_image_access.inc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/remote/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/setup_image_access.inc b/remote/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/setup_image_access.inc new file mode 100644 index 00000000..3c4ed330 --- /dev/null +++ b/remote/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/setup_image_access.inc @@ -0,0 +1,71 @@ +########################################################### +# Include: Setup dnbd for image access, nfs/cifs fallback # +########################################################### + +writelog "Now in setup_image_access.inc ..." + +# Try to use dnbd3 to access the image +unset vm_diskfile +unset vm_revision +unset dnbd3_fuse_mount_point +unset dnbd3_tmplog +if ! which dnbd3-fuse; then + writelog "Can't use dnbd3 as dnbd3-fuse binary is not in PATH" +elif [ -z "$SLX_DNBD3_SERVERS" ] || [ "x$SLX_VM_DNBD3" != "xyes" ]; then + writelog "Can't use dnbd3 as no servers are given in config, or SLX_VM_DNBD3 is not set to yes" +else + # Mount path for images mounted with dnbd3-fuse + dnbd3_fuse_mount_point="$TMPDIR/dnbd3fuse.mnt" + mkdir -p "${dnbd3_fuse_mount_point}" + # start dnbd3-fuse in subshell + dnbd3_tmplog="$TMPDIR/dnbd3fuse.log" + dnbd3_exitflag="$TMPDIR/dnbd3exit$RANDOM" + rm -f -- "$dnbd3_exitflag" + ( + dnbd3-fuse -f -o allow_other,max_readahead=262144 -h "$SLX_DNBD3_SERVERS" -i "${imgrelpath}" "${dnbd3_fuse_mount_point}" > "$dnbd3_tmplog" 2>&1 + RET=$? + touch "$dnbd3_exitflag" + if [ "$RET" != "0" ]; then + writelog "dnbd3-fuse stopped working (Exit code $RET)" + slxlog "virt-dnbd3-fuse" "dnbd3-fuse stopped/refused serving '${imgrelpath}' from '${SLX_DNBD3_SERVERS}' with error code: $RET" "${dnbd3_tmplog}" + fi + ) & + # give it a bit of time + usleep 250000 + # check if we have the image + for TIMEOUT in 0.5 1 1 OUT; do + if [ -r "${dnbd3_fuse_mount_point}/img" ]; then + vm_revision="$(grep -m 1 "^Revision:" "${dnbd3_fuse_mount_point}/status" | cut -d" " -f2)" + vm_diskfile="${dnbd3_fuse_mount_point}/img" + writelog "DNBD3: $imgrelpath on $vm_diskfile with rid $vm_revision" + vmpath="$vm_diskfile" + break + fi + [ "$TIMEOUT" = "OUT" -o -e "$dnbd3_exitflag" ] && break + sleep "$TIMEOUT" + done + + if [ -z "$vm_diskfile" ]; then + slxlog "virt-dnbd3" "No dnbd3 server for ${imgrelpath} found, trying NFS/CIFS..." "$dnbd3_tmplog" + writelog "No working dnbd3 server found :-(" + fi +fi + +# $vm_diskfile will be empty if dnbd3 is not used or failed. Let's try to fall back to NFS/CIFS via file system +if [ -z "$vm_diskfile" ]; then + new_vmpath=$(ls "${vmpath}.r"* | grep -E -o '\.r[0-9]+$' | grep -o -E '[0-9]+' | sort -n | tail -n 1) + [ -n "$new_vmpath" ] && vmpath="${vmpath}.r${new_vmpath}" + vm_diskfile="$vmpath" +fi + +# Check if virtual machine container file exists +if ! [ -e "${vmpath}" ]; then + slxlog "virt-image-missing" "VM image $vmpath not found!" + writelog "Virtual machine image ${vmpath} not found!" + error_user "Das Image für die gewählte Virtuelle Maschine konnte nicht gefunden werden. +Versuchen Sie zunächst, den Computer komplett neu zu starten. Sollte das Problem bestehen bleiben, wenden Sie sich bitte an den Support." + cleanexit 1 +fi + +writelog "Virtual machine disk file: $vm_diskfile" + |