timmow

GDS Profiling Python

pip install grpof2dot
pip install graphviz

gprof2dot -f pstats /tmp/-1422538070.52.profile | dot -Tpng -o output.png

How to create a .profile file in /tmp:

Add the following de

timmow

# linux containers from scratch

different to virtual machines

full os in container has some gotchas

containers are transparent

host os sees process from within container

timmow

Steve Shorrck - Life after human error

"someone did something someone else thinks is wrong"

Examples of headlines blaming human error

"Hal 9000 explanation" - not completely telling the truth

lots of examples of words used in failure situations

timmow

tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:48:09.785378 IP (tos 0x0, ttl 64, id 31267, offset 0, flags [DF], proto UDP (17), length 60)
    172.27.1.11.59292 > 8.8.8.8.53: [bad udp cksum 0xbd6f -> 0x9911!] 12994+ AAAA? www.google.com. (32)
12:48:09.798648 IP (tos 0x0, ttl 44, id 10954, offset 0, flags [none], proto UDP (17), length 88)
    8.8.8.8.53 > 172.27.1.11.59292: [udp sum ok] 12994 q: AAAA? www.google.com. 1/0/0 www.google.com. [4m59s] AAAA 2a00:1450:400c:c0a::93 (60)
12:48:09.798932 IP (tos 0x0, ttl 64, id 53453, offset 0, flags [DF], proto UDP (17), length 60)
    172.27.1.11.45605 > 8.8.8.8.53: [bad udp cksum 0xbd6f -> 0x661b!] 39754+ A? www.google.com. (32)
12:48:09.819764 IP (tos 0x0, ttl 44, id 10955, offset 0, flags [none], proto UDP (17), length 156)
    8.8.8.8.53 > 172.27.1.11.45605: [udp sum ok] 39754 q: A? www.google.com. 6/0/0 www.google.com. [3m13s] A 64.233.167.105, www.google.com. [3m13s] A 64.233.167.147, www.google.com. [3m13s] A 64.233.167.1

timmow

    _everyLittleHelps: function (data) {

      return _.map(data, function (dataset) {
        dataset['values'] = [];
        dataset['values'] = _.omit(dataset, ['values', 'channel']);
        console.log('tmp');
        console.log(dataset);

        return dataset;
      });

timmow

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.provider :virtualbox do |vb, override|
      vb.customize ["modifyvm", :id, "--memory", "2048", "--cpus", "2"]
  end
  config.vm.synced_folder ".", "/vagrant", type: "rsync"
end

timmow

for i in $(find .. -name '*collector*'  -type d -depth 1 -not -path '../performanceplatform-collectors'); do  echo "\n\n\n\n\n\n\n$i\n"; (cd $i; git --no-pager log --oneline --merges --since="21/4/2014" --color=always;) done | less -FXRS

timmow

What we want in CF

Dry run option

Its a bit scary to run an update option on a stack and potentially have all your running instances destroyed and replaced - would be good to have a dry run option

Ref / Fn::GetAtt works outside of current stack

timmow

node default {
  include $::puppet_class_set_from_fact
}

timmow

pt-kill --interval 2 --kill --busy-time 40 --match-command Query --victims all -v