Hi, Some people appear to have autostart VMs residing on slow storage. If libvirtd starts too early, it'll simply fail trying to start those VMs. It'd be nice to know when all the storage on which autostart containers depend becomes available, so as to safely start libvirt. The python script appended below is one approach. It could be called as something like for f in /etc/libvirt/qemu/autostart/* /etc/libvirt/lxc/autostart/*; do for d in `libvirt_list_storage.py $f`; do if [ ! -r $d ]; then echo "storage not yet ready" exit 1 fi done done echo "starting libvirtd" libvirtd (Realistically I would have this running in an upstart job which is 'start on mounted' and, if all storage available, emits a 'libvirt-storage-up' event). Are there better ways to go about this? thanks, -serge #!/usr/bin/python import sys from xml.dom.minidom import parse dom = parse(sys.argv[1]) def getText(nodelist): rc = [] for node in nodelist: if node.nodeType == node.TEXT_NODE: rc.append(node.data) return ''.join(rc) def print_domname(dom): #return print "Domain %s\n" % getText(dom.childNodes) def liststorages(dom): print_domname(dom.getElementsByTagName("name")[0]) disks = dom.getElementsByTagName("disk") list_disks(disks) filesystems = dom.getElementsByTagName('filesystem') list_filesystems(filesystems) def list_filesystems(fslist): for fs in fslist: if not fs.hasAttribute('type'): continue if fs.getAttribute('type') != 'mount': continue dirs = fs.getElementsByTagName("source") if len(dirs) == 0: continue if not dirs[0].getAttribute('dir'): continue print "dir: %s\n" % dirs[0].getAttribute('dir') def list_disks(disks): for disk in disks: if not disk.hasAttribute('type'): continue if disk.getAttribute('type') == 'file': list_disk_type_file(disk) elif disk.getAttribute('type') == 'block': list_disk_type_block(disk) else: # not supported continue def list_disk_type_file(disk): disksrcs = disk.getElementsByTagName("source") if len(disksrcs) == 0: return if not disksrcs[0].hasAttribute('file'): return print "file: %s\n" % disksrcs[0].getAttribute('file') def list_disk_type_block(disk): devsrscs = disk.getElementsByTagName("source") if len(devsrscs) == 0: return if not devsrscs[0].hasAttribute('dev'): return print "dev: %s\n" % devsrscs[0].getAttribute('dev') liststorages(dom)