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 | 81 |
1 files changed, 54 insertions, 27 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 index 3c4ed330..4eb66028 100644 --- 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 @@ -2,32 +2,40 @@ # Include: Setup dnbd for image access, nfs/cifs fallback # ########################################################### -writelog "Now in setup_image_access.inc ..." +# This will currently make sure that the variable +# VM_DISKFILE_RO is set which will contain the +# absolute path to the disk image to use for the vm +# session. +# When using DNBD3 this will differ from SRC_IMG_ABSOLUTE, +# otherwise it will be identical. +# In the future DNBD3 (or something else) might provide +# a CoW layer so we don't need snapshots etc. anymore. +# This include should set VM_DISKFILE_RW in that case to +# indicate to the virt plugin that it doesn't need to +# handle creating a temporary CoW layer itself. + +writelog "Setting up disk access for virtualizer/emulator ..." # Try to use dnbd3 to access the image -unset vm_diskfile -unset vm_revision +unset VM_DISKFILE_RO 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 + +setup_dnbd3 () { # 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$RANDOM" + local dnbd3_tmplog="$TMPDIR/dnbd3fuse.log" + local dnbd3_exitflag="$TMPDIR/dnbd3exit$RANDOM" + local TIMEOUT vm_revision rm -f -- "$dnbd3_exitflag" ( - dnbd3-fuse -f -o allow_other,max_readahead=262144 -h "$SLX_DNBD3_SERVERS" -i "${imgrelpath}" "${dnbd3_fuse_mount_point}" > "$dnbd3_tmplog" 2>&1 + dnbd3-fuse -f -o allow_other,max_readahead=262144 -h "$SLX_DNBD3_SERVERS" -i "${SRC_IMG_RELATIVE}" "${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}" + slxlog "virt-dnbd3-fuse" "dnbd3-fuse stopped/refused serving '${SRC_IMG_RELATIVE}' from '${SLX_DNBD3_SERVERS}' with error code: $RET" "${dnbd3_tmplog}" fi ) & # give it a bit of time @@ -36,36 +44,55 @@ else 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" + VM_DISKFILE_RO="${dnbd3_fuse_mount_point}/img" + writelog "DNBD3: $SRC_IMG_RELATIVE on $VM_DISKFILE_RO with rid $vm_revision" break fi [ "$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" + if [ -z "$VM_DISKFILE_RO" ]; then + slxlog "virt-dnbd3" "No dnbd3 server for ${SRC_IMG_RELATIVE} found, trying NFS/CIFS..." "$dnbd3_tmplog" writelog "No working dnbd3 server found :-(" fi +} + +# See if we should setup dnbd3 image access at all +if ! which dnbd3-fuse; then + writelog "Can't use dnbd3 as dnbd3-fuse binary is not in PATH" +elif [ -z "$SRC_IMG_RELATIVE" ]; then + writelog "Can't use dnbd3 as SRC_IMG_RELATIVE is not set" +elif [ -z "$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 + setup_dnbd3 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="$vmpath" +# VM_DISKFILE_RO will be empty if dnbd3 is not used or failed to connect. +# Let's try to fall back to NFS/CIFS via file system +if [ -z "$VM_DISKFILE_RO" ]; then + # Maybe we're reading a dnbd3 directory with RIDs encoded into the filename - use latest one + rid_suffix=$(ls -1 "${SRC_IMG_ABSOLUTE}.r"* | grep -E -o '\.r[0-9]+$' | grep -o -E '[0-9]+$' | sort -n | tail -n 1) + if [ -n "$rid_suffix" ]; then + # found + VM_DISKFILE_RO="${SRC_IMAGE_ABSOLUTE}.r${rid_suffix}" + elif [ -e "$SRC_IMAGE_ABSOLUTE" ]; then + # try name we got from xml in the first place + VM_DISKFILE_RO="$SRC_IMAGE_ABSOLUTE" + fi fi # Check if virtual machine container file exists -if ! [ -e "${vmpath}" ]; then - slxlog "virt-image-missing" "VM image $vmpath not found!" - writelog "Virtual machine image ${vmpath} not found!" +if [ -z "$VM_DISKFILE_RO" ] || ! [ -e "${VM_DISKFILE_RO}" ]; then + slxlog "virt-image-missing" "VM image $VM_DISKFILE_RO not found!" + writelog "Virtual machine image ${VM_DISKFILE_RO} 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" +readonly VM_DISKFILE_RO + +writelog "Disk file to use: $VM_DISKFILE_RO" |