def init_suse_hostsfile()

in VMExtension/hpcnodemanager.py [0:0]

• 31 lines of code
• 11 McCabe index (conditional complexity)

def init_suse_hostsfile(host_name, ipaddrs):
    hostsfile = '/etc/hosts'
    if not os.path.isfile(hostsfile):
        return
    try:
        newhpcd_entries = ''
        for ipaddr in ipaddrs:
            newhpcd_entries += '{0:24}{1:30}#HPCD\n'.format(ipaddr, host_name)

        curhpcd_entries = ''
        newcontent = ''
        hpcentryexists = False
        with open(hostsfile, 'r') as F:
            for line in F.readlines():
                if re.match(r"^[0-9\.]+\s+[^\s#]+\s+#HPCD\s*$", line):
                    curhpcd_entries += line
                    hpcentryexists = True
                elif re.match(r"^[0-9\.]+\s+[^\s#]+\s+#HPC\s*$", line):
                    hpcentryexists = True
                else:
                    newcontent += line

        if newhpcd_entries != curhpcd_entries:
            if hpcentryexists:
                waagent.Log("Clean the HPC related host entries from hosts file")
            waagent.Log("Add the following HPCD host entries:\n{0}".format(newhpcd_entries))
            if newcontent and newcontent[-1] != '\n':
                newcontent += '\n'
            newcontent += newhpcd_entries
            waagent.ReplaceFileContentsAtomic(hostsfile,newcontent)
            os.chmod(hostsfile, 0o644)
    except :
        raise