stevendanna

%% -*- mode: Erlang; fill-column: 80; comment-column: 75; -*-
%%-------------------------------------------------------------------
%% @author Steven Danna <[email protected]>
%% Copyright 2017 Chef, Inc. All Rights Reserved.
%%
-module(node_state_tests).

-include_lib("eunit/include/eunit.hrl").
-include_lib("hoax/include/hoax.hrl").

stevendanna

--- /hab/cache/src/mercurial-3.9.1/tests/test-obsolete.t
+++ /hab/cache/src/mercurial-3.9.1/tests/test-obsolete.t.err
@@ -972,8 +972,6 @@

   $ chmod 000 .hg/cache/hidden
   $ hg log -r . -T '{node}' --debug
-  cannot read hidden cache
-  error writing hidden changesets cache
   8fd96dfc63e51ed5a8af1bec18eb4b19dbf83812 (no-eol)
 #endif

stevendanna

Keybase proof

I hereby claim:

• I am stevendanna on github.
• I am ssd (https://keybase.io/ssd) on keybase.
• I have a public key ASBsBhcnsOsg-oAkxsHvggjT-1_nkvfJXFGRtUVFmKVtbAo

To claim this, I am signing this object:

stevendanna

-define(SELF, '[email protected]').
-define(BIFROST, '[email protected]').
-define(BIFROST_COOKIE, 'oc_bfirost').

init_network() ->
    net_kernel:start([?SELF, longnames]),
    erlang:set_cookie(node(), ?BIFROST_COOKIE),
    pong = net_adm:ping(?BIFROST).

main(_Args) ->

stevendanna

file "bar"
file "baz"

log "foo" do
  only_if do
    resources("file[bar]").updated ||
      resources("file[baz]").updated
  end
end

stevendanna

In terminal 1

> mkfifo test.fifo
> gcc test.c
> ./a.out

In terminal 2

> cat >test.fifo
(Interrupt with ctl+C)

stevendanna

def resource_exists?(resource_spec)
  resources(resource_spec)
  true
rescue Chef::Exceptions::ResourceNotFound
  false
end

stevendanna

Supposed Cause

Chef Server 12.0.8+ contains a new version of our underlying postgresql client library and a new version of the sqerl library which provideds an abstraction over that. These updates included the following change:

https://github.com/chef/sqerl/commit/11d08f363fa61958f5e46d2560447931f88ae3ee

which results in the following query being sent before each query that we send to sqerl:

set statement_timeout=5000

stevendanna

Understand the Permissions Requested by an oc_chef_wm Module

Chef Server API requests are eventually routed to a module in the oc_chef_wm application. These modules implement the 'chef_wm' behavior. A behavior defines a set of callback functions that are used to process each request.

For authorization, the relevant callback function is auth_info/2. auth_info/2 takes 2 arguments: The Request (which holds all the information about the HTTP request, such as method, path, etc) and the

stevendanna

* Benchmark Code

#+NAME: jsonbench
#+BEGIN_SRC erlang
#!/usr/bin/env escript
%% -*- erlang -*-
%%! -smp enable -sname jsonbench -pa deps/jiffy/ebin
-mode(compile).

main([Iter]) ->