pcn

I've been playing with jq, and I've been having a hard time finding examples of how it works with output from a service like AWS (which I use a lot).

Here is one I use a lot with vagrant-ec2.

When we're launching and killing a lot of instances, the AWS API is the only way to track down which instances are live, ready, dead, etc.

To find instances that are tagged with e.g. {"Key" = "Name", "Value" = "Web-00'} in the middle of a vagrant dev cycle, or a prod launch/replace cycle, you can do something like this:

pcn

#!/usr/bin/env python

# pragma pylint: disable=bad-whitespace
###############################################################################
# ntpq.py - Python NTP control library.
# Copyright (C) 2016 Peter C. Norton (@pcn on github)
#
# this addition to ntplib is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your option)

pcn

# XXX maybe move this to the util module
# Let's make our lives easier with assoc-in and get-in
# From: https://stackoverflow.com/questions/10578554/equivalent-of-clojures-assoc-in-and-get-in-in-python
# with additional support for deferencing an array
def _assoc_in(dct, path, value, sep=':'):
    """In a dictionary dct, using the path (which is a 
    <sep>-separated string) assign the resulting key to value,
    overwriting it if its present. If it encounters an iterable and the current
    path component is an integer, operates on that.
    """

pcn

package main

import (
	"context"
	"fmt"
	"reflect"

	docopt "github.com/docopt/docopt-go"

	"github.com/gogo/protobuf/jsonpb"

pcn

Saltstack mode for emacs

Earlier today I was looking for a Saltstack mode for emacs. Couldn't find one, so I posted the question on Stack overflow. Somebody had a good suggestion about using yaml-mode because a Sublime Text implementation appeared to be taking this approach.Another person thought that Saltstack's use of jinja templates would make an emacs mode easy enough to configure. These were both helpful ideas so I wanted to implement parts of each.

Reasoning

After looking around, I found that someone had configured an emacs mode for a similar situation. They needed to combine HTML and Python to use Mako templates for a project not involving Saltstack. Since Edx uses Mako t

pcn

About me

I’m an intermediate/advanced chef user. My main usage has been as a client of the services that chef provides, and not operating the server. My comfort zone is that I am very happy to write and hack on fairly complicated chef cookbooks, LWRPs, and chef-solo work, but I don’t work much with the chef server - I’ve opted to use the hosted service in the past, and very much enjoyed the service.

Why Saltstack?

I’m interested in saltstack. When I first started working with chef in 2011, saltstack was very new, so I learned chef, as the more mature option (though it was still fairly new). Now salt is in a fairly mature phase where it seems to be able to handle the same classes of installation and configuration management that I’ve seen chef work with in the past. This impression is backed up by users of Salt who are clearly using it in their day-to-day operations. So I’m trying it out.

References, etc.

pcn

Mute these words in your settings here: https://twitter.com/settings/muted_keywords

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pcn

Why would this:
```
# This could be expanded into another function to allow for
# reconfiguring more of the clickhouse_config_settings if we find we need
# it in the future.
def config_bg_pool_size(size=2):
    """When replacing a clickhouse node, we want to reduce the background
    pool size, because at the default of 8, it'll max out the
    resources on its peer nodes as it replicates data to itself.

pcn

Exception while retrieving instance list from AWS API: Unable to execute HTTP request: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty

pcn

This doesn't make a lot of sense to me:

{%   set es_config_per_nodetype = { 'default2': 'default2' } %}
{%   set es_config_per_default = { 'default': 'default' } %}


{% set foo = salt['defaults.merge'](es_config_per_defaults, es_config_per_nodetype) %}

invoking that via: