import os from blitzem.model import Node, Size, defaults from libcloud.compute.deployment import MultiStepDeployment, ScriptDeployment, SSHKeyDeployment # Can override specific default settings. defaults["os"] = "Ubuntu 11.10" """ ==== WEB TIER ==== """ # A simple node in the 'web' tier Node( name="web1", tags=["web"]) # A node with more customized settings - also tagged 'peakload' for scaling control Node( name="web2", os="Ubuntu 11.04", tags=["web", "peakload"], size=Size(ram=512)) """ ==== APP TIER ==== """ Node( name="app1", os="Ubuntu 11.04", tags=["app"]) # also tagged 'peakload' for scaling control Node( name="app2",
from blitzem.model import Node, LoadBalancer, Size, defaults, user_public_ssh_key
from libcloud.compute.deployment import MultiStepDeployment, ScriptDeployment, SSHKeyDeployment
from blitzem.deployment import LoggedScriptDeployment
defaults["deployment"] = MultiStepDeployment([
# Note: This key will be added to the authorized keys for the root user
# (/root/.ssh/authorized_keys)
SSHKeyDeployment(open(user_public_ssh_key).read()),
# Serve a simple text file on each node to demonstrate load balancing effect
LoggedScriptDeployment("apt-get update; apt-get install dtach"),
LoggedScriptDeployment("mkdir web; cd web; hostname > hostname.txt; dtach -n /tmp/simple_http.worker python -m SimpleHTTPServer 8080")
])
"""
==== WEB TIER ====
"""
LoadBalancer( name="web_lb1",
applies_to_tag="web",
port=8080,
protocol="http")
# A simple pair of nodes in the 'web' tier
Node( name="web1",
tags=["web"])
Node( name="web2",
tags=["web"])
def create_dummies(self, node_name="", node_exists=False):
self.node = Node(name=node_name, tags=["tag1"], size=Size(ram=512))
self.conn = DummyConn(node_name, node_exists)
