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

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

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

    _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

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

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

# 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

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

[03-Mar-15 11:29:58] DEBUG [django.db.backends:79] (0.004) 
            SELECT c.relname
            FROM pg_catalog.pg_class c
            LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relkind IN ('r', 'v', '')
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid); args=None
[03-Mar-15 11:29:58] DEBUG [django.db.backends:79] (0.002) SELECT "django_content_type"."id", "django_content_type"."name", "django_content_type"."app_label", "django_content_type"."model" FROM "django_content_type" WHERE ("django_content_type"."model" = 'logentry'  AND "django_content_type"."app_label" = 'admin' ); args=('logentry', u'admin')
[03-Mar-15 11:29:58] DEBUG [django.db.backends:79] (0.001) SELECT "auth_permission"."content_type_id", "auth_permission"."codename" FROM "auth_permission" INNER JOIN "django_content_type" ON ( "auth_permission"."content_type_id" = "django_content_type"."id" ) WHERE "auth_permission"."content_type

timmow

First, checkout a new branch of cf-terraform from vanilla_cf_prototype

git checkout vanilla_cf_prototype # from master
git checkout -b vanilla_cf_prototype_split

Then run the following -