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#!/usr/bin/env python
# This demonstrates a node group configurations.
#
# Node groups can be defined with the syntax "-g N@IP0,IP1-IP2,IP3".
# This says to create a group of N nodes with IPs IP0, IP1, ..., IP2,
# IP3. Run it with deterministic IPs causes lots of gratuitous IP
# reassignments. Running with --nd fixes this.
import ctdb_takeover
import sys
from optparse import make_option
import string
ctdb_takeover.process_args([
make_option("-g", "--group",
action="append", type="string", dest="groups",
help="define a node group using N@IPs syntax"),
])
def expand_range(r):
sr = r.split("-", 1)
if len(sr) == 2:
all = string.ascii_uppercase + string.ascii_lowercase
sr = list(all[all.index(sr[0]):all.index(sr[1])+1])
return sr
def add_node_group(s):
(count, ips_str) = s.split("@", 1)
ips = [i for r in ips_str.split(",") \
for i in expand_range(r) if r != ""]
for i in range(int(count)):
c.add_node(ctdb_takeover.Node(ips))
c = ctdb_takeover.Cluster()
if ctdb_takeover.options.groups is None:
print "Error: no node groups defined."
sys.exit(1)
for g in ctdb_takeover.options.groups:
add_node_group(g)
c.recover()
c.random_iterations()
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