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# Copyright 2019 Northern.tech AS
# This file is part of Cfengine 3 - written and maintained by Northern.tech AS.
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; version 3.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
# To the extent this program is licensed as part of the Enterprise
# versions of Cfengine, the applicable Commercial Open Source License
# (COSL) may apply to this file if you as a licensee so wish it. See
# included file COSL.txt.
#+begin_src prep
#@ ```
#@ echo alpha > /tmp/cfe_hostlist
#@ echo beta >> /tmp/cfe_hostlist
#@ echo gamma >> /tmp/cfe_hostlist
#@ echo "Set HOSTNAME appropriately beforehand"
#@ echo "$(hostname -f)" | tr 'A-Z' 'a-z' >> /tmp/cfe_hostlist
#@ echo "Delta Delta Delta may I help ya help ya help ya"
#@ echo delta1 >> /tmp/cfe_hostlist
#@ echo delta2 >> /tmp/cfe_hostlist
#@ echo delta3 >> /tmp/cfe_hostlist
#@ echo may1.I.help.ya >> /tmp/cfe_hostlist
#@ echo may2.I.help.ya >> /tmp/cfe_hostlist
#@ echo may3.I.help.ya >> /tmp/cfe_hostlist
#@ ```
#+end_src
###############################################################################
#+begin_src cfengine3
body common control
{
bundlesequence => { "peers" };
}
bundle agent peers
{
vars:
"mygroup" slist => peers("/tmp/cfe_hostlist","#.*",4);
"myleader" string => peerleader("/tmp/cfe_hostlist","#.*",4);
"all_leaders" slist => peerleaders("/tmp/cfe_hostlist","#.*",4);
reports:
# note that the current host name is fourth in the host list, so
# its peer group is the first 4-host group, minus the host itself.
"/tmp/cfe_hostlist mypeer $(mygroup)";
# note that the current host name is fourth in the host list, so
# the peer leader is "alpha"
"/tmp/cfe_hostlist myleader $(myleader)";
"/tmp/cfe_hostlist another leader $(all_leaders)";
"Unable to find my fully qualified hostname $(sys.fqhost) in /tmp/cfe_hostlist. Can't determine peers."
if => not( regline( $(sys.fqhost), "/tmp/cfe_hostlist" ) );
}
#+end_src
###############################################################################
#+begin_src example_output
#@ ```
#@ R: /tmp/cfe_hostlist mypeer alpha
#@ R: /tmp/cfe_hostlist mypeer beta
#@ R: /tmp/cfe_hostlist mypeer gamma
#@ R: /tmp/cfe_hostlist myleader alpha
#@ R: /tmp/cfe_hostlist another leader alpha
#@ R: /tmp/cfe_hostlist another leader delta1
#@ R: /tmp/cfe_hostlist another leader may2.I.help.ya
#@ ```
#+end_src
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