/
generate-compose.py
177 lines (162 loc) · 6.38 KB
/
generate-compose.py
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import yaml
from collections import OrderedDict
import argparse
compose = OrderedDict()
compose["version"] = "2"
compose["services"] = OrderedDict()
def extend(od, kind):
od["extends"] = OrderedDict()
od["extends"]["file"] = "common.yml"
od["extends"]["service"] = kind
class Postgres:
next_port = 6432
def __init__(self, name):
self.base_port = Postgres.next_port
Postgres.next_port +=1
self.name = name
def service(self):
ret = OrderedDict()
ret["image"] = "postgres"
ret["environment"] = {"POSTGRES_PASSWORD":"mysecretpassword"}
ret["ports"] = ["%d:5432"%self.base_port]
return ret
def db_url(self):
return "postgres://postgres:mysecretpassword@postgres:5432"
class LocallyBuilt:
def build_context(self, kind):
ret = OrderedDict()
ret["build"] = {
"context": ".",
"dockerfile": "%s/Dockerfile" % kind
}
ret["image"] = "potboiler/%s:latest" % kind
ret["volumes"] = [".:/code:cached"]
return ret
class Core(LocallyBuilt):
def __init__(self, name, index, postgres):
self.base_port = 8000 + index*100
self.name = name
self.postgres = postgres
def service(self):
ret = self.build_context("core")
ret["environment"] = {"DATABASE_URL": self.postgres.db_url()}
ret["ports"] = ["%d:8000"%self.base_port]
ret["links"] = ["%s:postgres"%self.postgres.name]
return ret
def log_url(self):
return "http://core:8000/log"
class KV(LocallyBuilt):
def __init__(self, name, index, postgres, core):
self.base_port = 8001 + index*100
self.name = name
self.postgres = postgres
self.core = core
def service(self):
ret = self.build_context("kv")
ret["environment"] = {
"DATABASE_URL": self.postgres.db_url(),
"SERVER_URL": self.core.log_url(),
"KV_ROOT": "http://%s:8001" % self.name
}
ret["ports"] = ["%d:8001"%self.base_port]
ret["links"] = ["%s:postgres"%self.postgres.name, "%s:core"%self.core.name]
return ret
def base_url(self):
return "http://kv:8001/kv"
class Pigtail(LocallyBuilt):
def __init__(self, name, index, postgres, core):
self.base_port = 8003 + index*100
self.name = name
self.postgres = postgres
self.core = core
def service(self):
ret = self.build_context("pigtail")
ret["environment"] = {
"DATABASE_URL": self.postgres.db_url(),
"SERVER_URL": self.core.log_url(),
"HOST": self.name
}
ret["ports"] = ["%d:8000"%self.base_port]
ret["links"] = ["%s:postgres"%self.postgres.name, "%s:core"%self.core.name]
return ret
class KVBrowser:
def __init__(self, name, index, postgres):
self.base_port = 8002 + index*100
self.name = name
self.postgres = postgres
def service(self):
ret = OrderedDict()
ret["build"] = "kv-browser"
ret["image"] = "potboiler/kv-browser:latest"
ret["volumes"] = ["./kv-browser/:/code:cached"]
ret["environment"] = {"DATABASE_URL": self.postgres.db_url()}
ret["ports"] = ["%d:5000"%self.base_port]
ret["links"] = ["%s:postgres"%self.postgres.name]
return ret
class Correspondence:
def __init__(self, name, index, kv):
self.base_port = 8004 + index*100
self.name = name
self.kv = kv
def service(self):
ret = OrderedDict()
ret["build"] = "../correspondence"
ret["image"] = "potboiler/correspondence:latest"
ret["volumes"] = ["../correspondence/:/code:cached"]
ret["environment"] = {"SERVER_URL": self.kv.base_url()}
ret["ports"] = ["%d:5000"%self.base_port]
ret["links"] = ["%s:kv"%self.kv.name]
ret["command"] = "bash -c \"./wait-for-it.sh --timeout=0 kv:8001 -s -- flask run --host=0.0.0.0\""
return ret
parser = argparse.ArgumentParser()
parser.add_argument('--component', action='append', default=[], dest="components", choices=["kv", "pigtail", "correspondence"])
parser.add_argument('count', type=int)
args = parser.parse_args()
services = []
for index in range(args.count):
postgres = Postgres("postgres-core%d"%index)
services.append(postgres)
core = Core("core%d"%index, index, postgres)
services.append(core)
if args.components == [] or "kv" in args.components or "correspondence" in args.components:
postgres = Postgres("postgres-kv%d"%index)
services.append(postgres)
kv = KV("kv%d"%index, index, postgres, core)
services.append(kv)
services.append(KVBrowser("kv-browser%d"%index, index, postgres))
if args.components == [] or "pigtail" in args.components:
postgres = Postgres("postgres-pigtail%d"%index)
services.append(postgres)
services.append(Pigtail("pigtail%d"%index, index, postgres, core))
if "correspondence" in args.components:
services.append(Correspondence("correspondence%d"%index, index, kv))
for service in services:
compose["services"][service.name] = service.service()
# from http://blog.elsdoerfer.name/2012/07/26/make-pyyaml-output-an-ordereddict/
def represent_odict(dump, tag, mapping, flow_style=None):
"""Like BaseRepresenter.represent_mapping, but does not issue the sort().
"""
value = []
node = yaml.MappingNode(tag, value, flow_style=flow_style)
if dump.alias_key is not None:
dump.represented_objects[dump.alias_key] = node
best_style = True
if hasattr(mapping, 'items'):
mapping = list(mapping.items())
for item_key, item_value in mapping:
node_key = dump.represent_data(item_key)
node_value = dump.represent_data(item_value)
if not (isinstance(node_key, yaml.ScalarNode) and not node_key.style):
best_style = False
if not (isinstance(node_value, yaml.ScalarNode) and not node_value.style):
best_style = False
value.append((node_key, node_value))
if flow_style is None:
if dump.default_flow_style is not None:
node.flow_style = dump.default_flow_style
else:
node.flow_style = best_style
return node
yaml.SafeDumper.add_representer(OrderedDict,
lambda dumper, value: represent_odict(dumper, 'tag:yaml.org,2002:map', value))
print(yaml.safe_dump(compose, default_flow_style=False))