10 from string import Template
12 import sliver_libvirt as lv
14 class Sliver_LXC(lv.Sliver_Libvirt):
15 """This class wraps LXC commands"""
19 # Need to add a tag at myplc to actually use this account
22 REF_IMG_BASE_DIR = '/vservers/.lvref'
23 CON_BASE_DIR = '/vservers'
26 def create(name, rec=None):
27 ''' Create dirs, copy fs image, lxc_create '''
28 logger.verbose ('sliver_lxc: %s create'%(name))
29 conn = lv.getConnection(Sliver_LXC.TYPE)
31 # Get the type of image from vref myplc tags specified as:
37 logger.log('sliver_libvirt: %s: WARNING - no vref attached defaults to lxc-f14' % (name))
38 vref = "lxc-f14-x86_64"
40 refImgDir = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref)
41 containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)
43 # check the template exists -- there's probably a better way..
44 if not os.path.isdir(refImgDir):
45 logger.log('sliver_lxc: %s: ERROR Could not create sliver - reference image %s not found' % (name,vref))
46 logger.log('sliver_lxc: %s: ERROR ctd expected reference image in %s'%(name,refImgDir))
49 # Snapshot the reference image fs (assume the reference image is in its own
51 command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
52 logger.log_call(command, timeout=15*60)
53 command = ['chmod', '755', containerDir]
54 logger.log_call(command, timeout=15*60)
56 # customize prompt for slice owner
57 dot_profile=os.path.join(containerDir,"root/.profile")
58 with open(dot_profile,'w') as f:
59 f.write("export PS1='%s@\H \$ '\n"%(name))
63 # Set hostname. A valid hostname cannot have '_'
64 #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
65 # print >>f, name.replace('_', '-')
67 # Add slices group if not already present
68 command = ['/usr/sbin/groupadd', 'slices']
69 logger.log_call(command, timeout=15*60)
71 # Add unix account (TYPE is specified in the subclass)
72 command = ['/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name, '-p', '*']
73 logger.log_call(command, timeout=15*60)
74 command = ['mkdir', '/home/%s/.ssh'%name]
75 logger.log_call(command, timeout=15*60)
77 # Create PK pair keys to connect from the host to the guest without
78 # password... maybe remove the need for authentication inside the
80 command = ['su', '-s', '/bin/bash', '-c', 'ssh-keygen -t rsa -N "" -f /home/%s/.ssh/id_rsa'%(name)]
81 logger.log_call(command, timeout=15*60)
83 command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name]
84 logger.log_call(command, timeout=15*60)
86 command = ['mkdir', '%s/root/.ssh'%containerDir]
87 logger.log_call(command, timeout=15*60)
89 command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
90 logger.log_call(command, timeout=15*60)
92 # Lookup for xid and create template after the user is created so we
93 # can get the correct xid based on the name of the slice
94 xid = bwlimit.get_xid(name)
96 # Template for libvirt sliver configuration
97 # template_filename = Sliver_LXC.REF_IMG_BASE_DIR + '/lxc_template.xml'
98 # for compat with lxc-reference package, hopefully temporary
99 template_filename_lxcreference = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR,'config_template.xml')
100 template_filename_sliceimage = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR,'lxc_template.xml')
101 if os.path.isfile (template_filename_lxcreference):
102 logger.log("WARNING: using compat template %s"%template_filename_lxcreference)
103 template_filename=template_filename_lxcreference
104 elif os.path.isfile (template_filename_sliceimage):
105 logger.log("WARNING: using compat template %s"%template_filename_sliceimage)
106 template_filename=template_filename_sliceimage
108 logger.log("Cannot find XML template")
109 logger.log("neither %s"%template_filename_lxcreference)
110 logger.log("nor %s"%template_filename_sliceimage)
113 with open(template_filename) as f:
114 template = Template(f.read())
115 xml = template.substitute(name=name, xid=xid)
117 logger.log('Failed to parse or use XML template file %s'%template_filename)
120 # Lookup for the sliver before actually
121 # defining it, just in case it was already defined.
123 dom = conn.lookupByName(name)
125 dom = conn.defineXML(xml)
126 logger.verbose('lxc_create: %s -> %s'%(name, lv.debuginfo(dom)))
131 logger.verbose ('sliver_lxc: %s destroy'%(name))
132 conn = lv.getConnection(Sliver_LXC.TYPE)
134 containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name)
137 # Destroy libvirt domain
138 dom = conn.lookupByName(name)
140 logger.verbose('sliver_lxc: Domain %s does not exist! UNEXPECTED'%name)
146 logger.verbose('sliver_lxc: Domain %s not running... continuing.'%name)
150 # Remove user after destroy domain to force logout
151 command = ['/usr/sbin/userdel', '-f', '-r', name]
152 logger.log_call(command, timeout=15*60)
154 # Remove rootfs of destroyed domain
155 command = ['btrfs', 'subvolume', 'delete', containerDir]
156 logger.log_call(command, timeout=15*60)
158 logger.verbose('sliver_libvirt: %s destroyed.'%name)