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keyspace-config.py
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keyspace-config.py
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import string
txt = "";
txt += " \n"
txt += " client(s) \n"
txt += " \n"
txt += " ^ \n"
txt += " | \n"
txt += " | node AA \n"
txt += " | +-------------------+ \n"
txt += " | + BBBBBBBBBBBBBBB | \n"
txt += " | | | \n"
txt += " | + CCCCCCCCCCCCCCC | \n"
txt += " | | | \n"
txt += " | | | \n"
txt += " DDDDD --+ Keyspace | \n"
txt += " | | | \n"
txt += " EEEEE --+ HTTP | \n"
txt += " | | \n"
txt += " | | \n"
txt += " | | \n"
txt += " GGGGG --+ Paxos | \n"
txt += " | | | \n"
txt += " HHHHH --+ PaxosLease | \n"
txt += " | | | \n"
txt += " IIIII --+ Catchup | \n"
txt += " | | | \n"
txt += " | +-------------------+ \n"
txt += " | \n"
txt += " | \n"
txt += " | \n"
txt += "----+-------- [replication] ------\n"
def node_ascii(id, host, database_dir, keyspace_port, http_port, paxos_port):
global txt
rules = []
rules.append(["AA", id, string.ljust])
rules.append(["BBBBBBBBBBBBBBB", host, string.center])
rules.append(["CCCCCCCCCCCCCCC", database_dir, string.center])
rules.append(["DDDDD", keyspace_port, string.rjust])
rules.append(["EEEEE", http_port, string.rjust])
rules.append(["FFFFF", paxos_port, string.rjust])
rules.append(["GGGGG", str(int(paxos_port)+0), string.rjust])
rules.append(["HHHHH", str(int(paxos_port)+1), string.rjust])
rules.append(["IIIII", str(int(paxos_port)+2), string.rjust])
return replace(txt, rules)
def replace(txt, rules):
for rule in rules:
fr = str(rule[0])
to = str(rule[1])
padder = rule[2]
if len(fr) > len(to):
to = padder(to, len(fr))
elif len(fr) < len(to):
to = to[:len(fr)-2] + ".."
txt = txt.replace(fr, to)
return txt
def merge(txts):
parts = []
for txt in txts:
p = txt.split("\n")
parts.append(p)
num_lines = len(parts[0])
txt = ""
for i in xrange(num_lines):
for j in xrange(len(txts)):
txt += parts[j][i]
txt += "\n"
return txt
def option_input(str, options):
opts_str = "/".join(options)
options_lower = []
for opt in options: options_lower.append(opt.lower())
inp = ""
while True:
inp = raw_input("%s [%s]: " % (str, opts_str)).lower()
# verify
if inp in options_lower: return inp
# handle default
if inp == "":
for opt in options:
if opt == opt.upper(): return opt.lower()
# no default
print("Please specify one of [%s]!" % opts_str)
def default_input(str, default, cons_func=None):
while True:
inp = raw_input("%s [%s]: " % (str, default))
# verify
if cons_func is not None:
try:
if cons_func(inp): return inp
except: pass
# handle default
if inp == "": return default
# no default
print("Invald input, try again!")
def replicated_config():
num_nodes = int(default_input("How many nodes will the Keyspace cluster consist of?", "3", int))
same_host = option_input("Will you be running all Keyspace nodes on the *same* host (eg. for testing)?", ["Y", "n"])
if same_host == "y":
host = default_input("What is the IP address or domain name of the host?", "127.0.0.1")
hosts = []
for i in xrange(num_nodes): hosts.append(host)
# get database dir
database_dirs = []
for i in xrange(num_nodes):
database_dir = default_input("Where should the %d. node store its database files?" % i, "/tmp/keyspace/%s" % i)
database_dirs.append(database_dir)
# get paxos ports
paxos_ports = []
for i in xrange(num_nodes):
port = default_input("Port number for Paxos replication on the %d. node?" % i, str(10000+i*10), int)
paxos_ports.append(port)
# get http ports
http_ports = []
for i in xrange(num_nodes):
port = default_input("Port number for HTTP on the %d. node?" % i, str(8080+i), int)
http_ports.append(port)
# get keyspace ports
keyspace_ports = []
for i in xrange(num_nodes):
port = default_input("Port number for Keyspace protocol on the %d. node?" % i, str(7080+i), int)
keyspace_ports.append(port)
else:
print("")
print("-> Assuming identical Keyspace configurations on all %d nodes!" % num_nodes)
print("")
hosts = []
for i in xrange(num_nodes):
host = raw_input("What is the IP address (or domain name) of the %d. node? " %i)
hosts.append(host)
# get database dir
database_dir = default_input("Where should Keyspace store the database files?", "/var/keyspace")
database_dirs = []
for i in xrange(num_nodes): database_dirs.append(database_dir)
# get paxos port
port = default_input("Port number for Paxos replication?", str(10000), int)
paxos_ports = []
for i in xrange(num_nodes): paxos_ports.append(port)
# get http ports
port = default_input("Port number for HTTP?", str(8080), int)
http_ports = []
for i in xrange(num_nodes): http_ports.append(port)
# get keyspace ports
port = default_input("Port number for Keyspace protocol?", str(7080), int)
keyspace_ports = []
for i in xrange(num_nodes): keyspace_ports.append(port)
configs = gen_replicated_config(num_nodes, hosts, database_dirs, paxos_ports, http_ports, keyspace_ports)
print("")
for i in xrange(num_nodes):
filename = "keyspace.%d.conf" % i
print("-> Writing configuration file of the %d. node to %s" % (i, filename))
write_file(filename, configs[i])
print("")
# generate client side connection string
keyspace_endpoints = []
for i in xrange(num_nodes):
keyspace_endpoints.append("%s:%s" % (hosts[i], keyspace_ports[i]))
keyspace_endpoints = ", ".join(keyspace_endpoints)
print("-> The connection string on the client side is: %s" % keyspace_endpoints)
print("")
ascii_art = option_input("Do you wish to see an informative ascii art describing your configuration?", ["Y", "n"])
if ascii_art == "y":
txts = []
for i in xrange(num_nodes):
txts.append(node_ascii(i, hosts[i], database_dirs[i], keyspace_ports[i], http_ports[i], paxos_ports[i]))
txt = merge(txts)
print(txt)
filename = "keyspace_art.txt"
print("-> Writing ascii art to %s" % filename)
write_file(filename, txt)
def gen_replicated_config(num_nodes, hosts, database_dirs, paxos_ports, http_ports, keyspace_ports):
paxos_endpoints = []
for i in xrange(num_nodes):
paxos_endpoints.append("%s:%s" % (hosts[i], paxos_ports[i]))
paxos_endpoints = ", ".join(paxos_endpoints)
configs = []
for i in xrange(num_nodes):
configs.append("")
configs[i] += "mode = replicated\n\n"
configs[i] += "paxos.nodeID = %s\n" % i
configs[i] += "paxos.endpoints = %s\n\n" % paxos_endpoints
configs[i] += "database.dir = %s\n\n" % database_dirs[i]
configs[i] += "http.port = %s\n" % http_ports[i]
configs[i] += "keyspace.port = %s\n\n" % keyspace_ports[i]
configs[i] += "log.trace = false\nlog.targets = stdout, file\nlog.file = keyspace.log\nlog.timestamping = false\n"
return configs
def single_config():
# get database dir
database_dir = default_input("Where should Keyspace store the database files?", "/var/keyspace")
http_port = default_input("Port number for HTTP?", str(8080), int)
keyspace_port = default_input("Port number for Keyspace protocol?", str(7080), int)
config = gen_single_config(database_dir, http_port, keyspace_port)
filename = "keyspace.conf"
print("-> Writing configuration file to %s" % filename)
write_file(filename, config)
def gen_single_config(database_dir, http_port, keyspace_port):
config = ""
config += "mode = single\n\n"
config += "database.dir = %s\n\n" % database_dir
config += "http.port = %s\n" % http_port
config += "keyspace.port = %s\n\n" % keyspace_port
config += "log.trace = false\nlog.targets = stdout, file\nlog.file = keyspace.log\nlog.timestamping = false\n"
return config
def write_file(filename, str):
file = open(filename, 'w')
file.write(str)
file.close()
print("")
print("Welcome to the Keyspace configuration file generator!")
print("-----------------------------------------------------")
print("")
print("-> This script will ask you a bunch of questions and then generate the Keyspace configuration files.")
print("-> The files are only generated at the end, you can always start over by hitting CTRL+C.")
print("")
inp = option_input("Is this a replicated or a single configuration?", ["R", "s"])
if inp == "r":
replicated_config()
else:
single_config()
print("-> Done.")
print("")