johnmccabe

require 'cgi'
require 'digest/md5'
require 'net/https'
require 'uri'

module Jekyll
  class GistTag < Liquid::Tag
    def initialize(tag_name, text, token)
      super
      @text           = text

johnmccabe

MARATHON_URL=http://xxx.xxx.xxx.xxx:8080

curl -X POST ${MARATHON_URL}/v2/apps -d @sample_marathon_task.json -H "Content-type: application/json"

johnmccabe

brooklyn.catalog:
  version: 0.9.0-SNAPSHOT  # BROOKLYN_VERSION
  items:

  # load everything in the classpath with a @Catalog annotation
  - scanJavaAnnotations: true

  - id: server
    description: |
      Provision a server, with customizable provisioning.properties and credentials installed, 

johnmccabe

#!/bin/sh
# Filename:     /etc/dhcp/dhclient-exit-hooks.d/sethostname
# Purpose:      Used by dhclient-script to set the hostname of the system
#               to match the DNS information for the host as provided by
#               DHCP.
# logs in /var/log/syslog
#

echo dhclient-exit-hooks.d/sethostname: reason = $reason, interface = $interface

johnmccabe

#!/bin/sh
echo "Running dhclient change hostname script for Ubuntu. reason=${reason}"
timestamp=$(date +%s)
if grep localhost /etc/hostname; then
    echo "Current hostname:"
    cat /etc/hostname
    echo "Attempting to configure hostname"
    if [ "x$reason" = "xBOUND" ]; then

        hostname=$new_host_name

johnmccabe

"brooklyn-jetty-server-8443-qtp878715618-32" prio=10 tid=0x00007f7ecd87d000 nid=0x7371 waiting on condition [0x00007f7eba19a000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000007be966a90> (a java.util.concurrent.FutureTask)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
        at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:425)
        at java.util.concurrent.FutureTask.get(FutureTask.java:187)
        at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:63)
        at org.apache.brooklyn.util.core.task.BasicTask.get(BasicTask.java:361)
        at org.apache.brooklyn.util.time.Durations.get(Durations.java:43)

johnmccabe

hello

johnmccabe

# via https://coderwall.com/p/_s_xda/fix-ssh-agent-in-reattached-tmux-session-shells
fixssh() {
  for key in SSH_AUTH_SOCK SSH_CONNECTION SSH_CLIENT; do
    if (tmux show-environment | grep "^${key}" > /dev/null); then
      value=`tmux show-environment | grep "^${key}" | sed -e "s/^[A-Z_]*=//"`
      export ${key}="${value}"
    fi
  done
}

johnmccabe

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

johnmccabe

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb