Re: resolve bug ?

[Mark . Burgess]

Well, it does what it says in the manual - removes old nameserver entries.
But I agree that it should remove everything.

M

On 15 Aug, Zeev Fisher wrote:
> Hi,
> 
> First , for some reason resolve doesn't do it's job ( i'm sure i tested 
> it before and it worked. something in the configuration files for some 
> reason confuse him.. )
> 
> I've added for test some garbage on resolv.conf and all it do  is 
> putting it on the last line of the file ( it actually ignores 
> EmptyResolvConf  = ( true ) )
> 
> [root@lnx81 /]# cat /etc/resolv.conf
> domain il.marvell.com
> nameserver 10.4.5.10
> nameserver 10.4.5.1
> lsajdklgf
> 
> 
> cfengine debugging doesn't say anything special. ( relevant part below )
> 
> I use version 2.1.7 and it happens on both Solaris and Linux.
> 
> I can't attach my complete set of config files for security reasons but 
> i can include the first ( and relevant ) part cf.main ( you will see 
> somehost1,2,3  instead real name for some variables )  :
> 
>      ###
>      #
>      # BEGIN cf.main
>      #
>      ###
> 
>      control:
> 
>         access    = ( root )        # Only root should run this
> 
>         domain    = ( il.marvell.com )
> 
>         sysadm    = ( zeevf@il.marvell.com )
>         smtpserver     = ( mail.il.marvell.com )  # used by cfexecd
> 
>         ChecksumDatabase = ( /var/cfengine/cache.db )
> 
>         ChecksumUpdates = ( on )
> 
>         EmptyResolvConf  = ( true )
> 
>         repository = ( /var/spool/cfengine )
> 
>         timezone  = ( IDT IST )
> 
>         sensiblesize  = ( 1000 )
>         sensiblecount = ( 2 )
>         editfilesize  = ( 20000 )
> 
>         #
>         # If we undefine this with cfengine -N longjob
>         # then we switch off all jobs labelled with this class
>         #
> 
>         addclasses = ( longjob )
> 
>         #
>         # Macros & constants are inherited downwards in imports
>         # but are not passed up to parent files. Good idea to
>         # define them all here
>         #
> 
>         masterfiles = ( /unix_srv/sysconfig/files )
> 
>         actionsequence = ( checktimezone resolve directories files 
> editfiles processes tidy disable
> links mountall copy shellcommands )
> 
>         # Local MSIL variables
> 
>         PrimaryAdminHost = ( somehost1 )
> 
>         Yokneam::
> 
>                 site = ( Yokneam )
>                 SecondaryAdminHost = ( somehost2 )
> 
>         Yokneam.Servers::
> 
>                 gateway = ( 10.4.15.254 )
> 
>         Yokneam.Desktops::
> 
>                 gateway = ( 10.4.23.254 )
> 
>         Lod::
> 
>                 site = ( Lod )
>                 SecondaryAdminHost = ( somehost3 )
> 
>         Lod.Servers::
> 
>                 gateway = ( 10.3.15.254 )
> 
>         Lod.Desktops::
> 
>                 gateway = ( 10.3.23.254 )
> 
>         redhat_7_3::
> 
>                 osver = ( 7.3 )
> 
>      ######################################################################
> 
>         ## there's a bug which swap the order of the resolver so on host 
> gravity10 will be first , Z
> eev 28/7 ##
>         resolve:
> 
>         10.4.5.1
>         10.4.5.10
> 
>      ######################################################################
> 
> 
> Debugging info for relevant part :
> 
> (BuildClassEnvironment)
> Actionsequence item resolve
> GetLock(resolve,,time=1092544457), ExpireAfter=120, IfElapsed=1
> GetLastLock()
> CheckOldLock(lock.cfagent_conf.lnx81.resolve.)
> Unable to find lock data lock.cfagent_conf.lnx81.resolve.
> SetLock(lock.cfagent_conf.lnx81.resolve.)
> PutLock(lock.cfagent_conf.lnx81.resolve.)
> Unable to delete lock [lock.cfagent_conf.lnx81.resolve.]: DB_NOTFOUND: 
> No matching key/data pair fou
> nd
> GetMacroValue(main,EmptyResolvConf)
> ExpandVarstring(10.4.5.1)
> ExpandVarstring(10.4.5.10)
> ReleaseCurrentLock(lock.cfagent_conf.lnx81.resolve.)
> PutLock(last.cfagent_conf.100.lnx81.resolve.)
> LockLog(Lock removed normally )
> Job start time set to Sun Aug 15 07:34:17 2004
> 
> 
> 
> The problem above lead to much more major problem - for some reason , if 
> resolving doesn't work on the machine , the class which is based on IP 
> range doesn't work and then cfengine terminate because it can't parse 
> the variables based on such groups. The output is :
> 
> Looking for an input file /var/cfengine/inputs/cfagent.conf
> Looking for an input file cf.groups
> Looking for an input file cf.main
> Looking for an input file cf.linux
> cf:cfengine::/var/cfengine/inputs/cf.linux:123: faculty/site undefined 
> variable
> cf:cfengine::/var/cfengine/inputs/cf.linux:123: faculty/site undefined 
> variable
> cf:cfengine::/var/cfengine/inputs/cf.linux:127: faculty/site undefined 
> variable
> cf:cfengine::/var/cfengine/inputs/cf.linux:127: faculty/site undefined 
> variable
> 
> which means that if i do mistake in resolv.conf , i can't fix it with 
> cfengine ...
> 
> The relevant lines from cf.linux are :
> 
> 123 : $(masterfiles)/$(site)/linux/all dest=/etc m=644 o=root g=root 
> type=checksum include=auto.*
> r=1 define=modified_autofs
> 
> 127: directories:
> 
> On debugging mode i indeed see that it says that the host isn't in the 
> IP range altough it's there ( the IP of the machine is 10.4.14.81 )
> 
> LVALUE Yokneam
> HandleLVALUE(Yokneam) in action Groups:
> EQUALS =
> LEFTBRACK
> RVAL-FUNCTION IPRange(10.4.12-21.1-255)
> HandleFunctionObject(IPRange(10.4.12-21.1-255))
> IsBuiltinFunction(IPRange(10.4.12-21.1-255))
> IsBuiltinFunction: IPRange(10.4.12-21.1-255)
> ExpandVarstring(10.4.12-21.1-255)
> HandleFunction: IPRange(10.4.12-21.1-255)
> Check ParsingIPRange(10.4.12-21.1-255)
> Unequal
> ExpandVarstring(XX_CF_opposite_any_XX)
> HandleGroupRVal(XX_CF_opposite_any_XX) group (Yokneam), type=0
> [No match of class XX_CF_opposite_any_XX]
> 
> If i fix resolv.conf and resolving works , the problem vanish and the 
> debug looks like this :
> 
> LVALUE Yokneam
> HandleLVALUE(Yokneam) in action Groups:
> EQUALS =
> LEFTBRACK
> RVAL-FUNCTION IPRange(10.4.12-21.1-255)
> HandleFunctionObject(IPRange(10.4.12-21.1-255))
> IsBuiltinFunction(IPRange(10.4.12-21.1-255))
> IsBuiltinFunction: IPRange(10.4.12-21.1-255)
> ExpandVarstring(10.4.12-21.1-255)
> HandleFunction: IPRange(10.4.12-21.1-255)
> Check ParsingIPRange(10.4.12-21.1-255)
> Matched octet 10 with 10
> Matched octet 4 with 4
> Matched octet 12-21 with 14
> Matched octet 1-255 with 81
> Matched IP range
> ExpandVarstring(any)
> HandleGroupRVal(any) group (Yokneam), type=0
> AddClassToHeap(Yokneam)
> RIGHTBRACK
> 
> 
> Anyone has an idea ?
> 
> 
> Thanks !
> 
> 



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Work: +47 22453272            Email:  Mark.Burgess@iu.hio.no
Fax : +47 22453205            WWW  :  http://www.iu.hio.no/~mark
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~