# @(#)77 1.2 src/43haes/usr/sbin/cluster/clinfo/clhosts, hacmp.clinfo, 61haes_r714 4/26/03 16:58:45 # IBM_PROLOG_BEGIN_TAG # This is an automatically generated prolog. # # 61haes_r714 src/43haes/usr/sbin/cluster/clinfo/clhosts 1.2 # # Licensed Materials - Property of IBM # # COPYRIGHT International Business Machines Corp. 1990,2003 # All Rights Reserved # # US Government Users Restricted Rights - Use, duplication or # disclosure restricted by GSA ADP Schedule Contract with IBM Corp. # # IBM_PROLOG_END_TAG # # ------------------------------------------- # Upon proper configuration, this file (clhosts) should contain a list # of IP labels/addresses of any HACMP for AIX servers with which the # Cluster Information daemon (clinfo) may communicate. Note that this # includes servers from any clusters accessible through logical network # connections. The installed version of clhosts on an HACMP for AIX # client node will differ from that on an HACMP for AIX server node. # # Contents of clhosts on an HACMP for AIX client node # --------------------------------------------------- # # As installed, the clhosts file on an HACMP for AIX client node will # contain NO IP labels/addresses. This is because HACMP for AIX server # addresses will vary from cluster to cluster, and these addresses must # be provided by the user at installation time. # # This file should contain all boot-time IP labels/addresses and/or the # service IP labels/addresses of HACMP for AIX servers to be contacted # through logical network connections. Upon startup, Clinfo uses these # IP labels/addresses to attempt communication with a Clsmuxpd process # executing on an HACMP for AIX server. If Clinfo succeeds in # communicating with a Clsmuxpd process executing on a server at one of # the provided addresses, it then acquires an entire cluster map, # including a list of all HACMP for AIX server interface IP addresses. # From then on, it will use this list, rather than the user-defined # list in the clhosts file, to recover from Clsmuxpd communication loss. # However, if Clinfo does not succeed in communicating with a Clsmuxpd # process at any of the provided addresses, it will continue indefinitely # to attempt communication, periodically trying each IP label/address # in the clhosts file, in sequential order. # # An example list of IP labels/addresses follows (Note: IP labels/addresses # begin in column 1. Comments preceded by '#' are permitted): # # cowrie_en0_cl83 # cowrie service # 140.186.91.189 # limpet service # floyd_en0_cl83 # floyd service # squid_en0_cl83 # squid service # # Contents of clhosts on an HACMP for AIX server node # --------------------------------------------------- # # As installed, the clhosts file on an HACMP for AIX server node will contain # a loopback IP address. Clinfo will attempt to communicate with a Clsmuxpd # process locally. If it succeeds, it then acquires an entire cluster # map, including a list of all HACMP for AIX server interface IP addresses. # From then on, it will use this list rather than the provided loopback # IP address in the clhosts file to recover from Clsmuxpd communication loss. # However, if Clinfo does not succeed in communicating with a Clsmuxpd # process locally, it will continue indefinitely to attempt communication # periodically ONLY to the local IP address. For this reason, it is # adviseable for the user to replace the loopback address with all HACMP for # AIX boot-time and/or service IP labels/addresses accessible through logical # connections with this node, just as on an HACMP for AIX client node. The # loopback address is provided only as a convenience. 127.0.0.1 # PowerHA SystemMirror # If IPv6 is not configured, comment out the IPv6 loopback address. # This will prevent CLSTAT cluster status UP/DOWN flipping. # If in future user wants to use IPv6, below line should be uncommented. #::1 # PowerHA SystemMirror