bitprophet

Cluster graphing

• It's frequently useful to graph a metric over a cluster of hosts, e.g. "show me the number of requests/s being handled by all of my load balancers".
• Doing this in vanilla Graphite is easy - it honors both glob expressions (lb*) and brace expressions ({a,b,c,d}).
• But how do we generate these for clusters whose hostnames don't glob well, and/or whose members change over time?

Descartes

• Generally flippin' awesome.
• Has a database of Metrics, Graphs composing 1+ Metrics, and Dashboards composing 1+ Graphs.

bitprophet

The setup:

• Some top level tasks
• A 'docs' submodule
• docs.build is configured to be the default task for 'docs'
• So, 'invoke docs' == 'invoke docs.build'. Either is allowed.

The question is, how should this setup display in --list? Our options:

1. Fab 1.x style: display both, no indication of what maps to what:

bitprophet

from fabric.api import parallel, execute, sudo


@parallel
def uptime():
    sudo('uptime')

def do_my_stuff():
    execute(uptime, hosts=['web1', 'web2'])

bitprophet

# Bad
foo \
bar

# Good
foo \
    bar

bitprophet

>>> def init(headers={}):
...     print "headers before: %r" % headers
...     headers['foo'] = 'bar'
...     print "headers after: %r" % headers
...     
... 
>>> init()
headers before: {}
headers after: {'foo': 'bar'}
>>> init()

bitprophet

i want to be able to do this:

---

# grocery list

* apples
* bananas
* strawberries

bitprophet

import csv
import json
import os
import sys
from collections import defaultdict

from dateutil.parser import parse as dateparse
import requests

bitprophet

import csv
import json
import sys
from collections import defaultdict

from dateutil.parser import parse as dateparse


count = int(sys.argv[2]) if len(sys.argv) > 2 else None
seconds = defaultdict(int)

bitprophet

# Output of https://github.com/bitprophet/seven/blob/master/2-io/day1/answers.io
# at 6a42e4c454eb6eb6499bc1264efa34fc22d3fa15

-- Type strength --
Strongly typed
Still strongly typed

-- Truthiness --
0 is true
empty string is true

bitprophet

def github(query, url):
    url = "https://github.com/%s/issues" % url
    # Direct to issue number
    try:
        redirect("%s/%s" % (url, int(query)))
    except ValueError:
        # New ticket
        if query == "new":
            redirect("%s/new" % url)
        # Issue list