talonx

#!/usr/bin/env ruby

instance_name = ARGV[0]
abort "Please specify an instance name" unless instance_name and instance_name.length > 0

instance_info, selected_instance = {}, nil
info_keymap = {2 => :ami_id, 3 => :address, 5 => :status, 6 => :keypair_name}

instances = `ec2-describe-instances`.split("\n").map{|l| l.split("\t")}
instances.each do |line|

talonx

In a perfect world, where things are done well, not just quickly, I would expect to find the following when joining the company:

Documentation

• Accurate / up-to-date systems architecture diagram

• Accurate / up-to-date network diagram

• Out-of-hours support plan

• Incident management plan

talonx

Orien is correct, it is the fork() system call triggered by ProcessBuilder or Runtime.exec or other means of the JVM executing an external process (e.g. another JVM running ant, a git command, etc.).

There have been some posts on the Jenkins mailing lists about this: Cannot run program "git" ... error=12, Cannot allocate memory

There is a nice description of the issue on the SCons dev list: fork()+exec() vs posix_spawn()

There is a long standing JVM bug report with solutions: Use posix_spawn, not fork, on S10 to avoid swap exhaustion. But I'm not sure if this actually made it into JDK7 as the comments suggest was the plan.

In summary, on Unix-like systems, when one process (e.g. the JVM) needs to launch another process (e.g. git) a system call is made to

talonx

---
- name: Capture files in path and register
  shell: >
    ls -1 /path/to/files
  register: files

- name: Remove files except specified
  file:
    path: "/path/to/files/{{ item }}"
    state: absent

talonx

#!/bin/sh

PROPERTY_FILE=apps.properties

function getProperty {
   PROP_KEY=$1
   PROP_VALUE=`cat $PROPERTY_FILE | grep "$PROP_KEY" | cut -d'=' -f2`
   echo $PROP_VALUE
}

talonx

import re, fileinput

print 'SET FOREIGN_KEY_CHECKS=0;'

def main():
  for line in fileinput.input():
    process = False
    for nope in ('BEGIN TRANSACTION','COMMIT',
                 'sqlite_sequence','CREATE UNIQUE INDEX'):
      if nope in line: break

talonx

kind: Service
apiVersion: v1
metadata:
  name: port-example-svc
spec:
  # Make the service externally visible via the node
  type: NodePort 

  ports:
    # Which port on the node is the service available through?

talonx

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"

talonx

###################################################
##
## Alertmanager YAML configuration for routing.
##
## Will route alerts with a code_owner label to the slack-code-owners receiver 
## configured above, but will continue processing them to send to both a
## central Slack channel (slack-monitoring) and PagerDuty receivers
## (pd-warning and pd-critical)
##