jpetazzo

Edit your wsgi.py file to wrap your application object as shown in the attached example.

Then go to /__guppy__ to see memory usage profiling.

This is very basic and probably needs to be refined.

jpetazzo

bitlbee:
  type: python-worker
  systempackages:
    - bitlbee
  processes:
    bitlbee: bitlbee -n

jpetazzo

--- a/fs/namespace.c.orig       2012-09-27 18:46:48.198667043 +0000
+++ b/fs/namespace.c    2012-09-27 18:47:13.214668751 +0000
@@ -2797,7 +2797,8 @@
        struct mnt_namespace *mnt_ns = ns;
        struct path root;
 
-       if (fs->users != 1)
+       int fs_users = atomic_read(&(fs->users));
+       if (fs_users != 1)
                return -EINVAL;

jpetazzo

www:
  # We use ruby-worker because we don't want all the scaffolding that comes with ruby (passenger etc.)
  type: ruby-worker
  # ... But we still want a www port to get HTTP traffic!
  ports:
    www: http
  processes:
    # OK, let's face it, I don't have the exact syntax of unicorn on the top of my head,
    # so this is blatantly fake:
    unicorn: unicorn --port $PORT_WWW --workers 10 --run-in-foreground

jpetazzo

Someone asked how to get the latlong from a specific road near a town on OpenStreetMap.

If you need to do it only once (e.g., you're about to go on a trip, and your GPS cannot find your destination city, but allows you to enter GPS coordinates), you can use Nominatim, OpenStreetMap's geocoding interface.

If you need to do it multiple times, in a programmatic manner, there are at least two ways to do that.

Note: I worked with OSM data a couple of years ago, but I don't have an OSM database on my local laptop right now, so some instructions will be a bit fuzzy. I do apologize in advance.

PostGIS queries on a local OSM DB

jpetazzo

#!/bin/sh
[ -f ~/.ssh/id_rsa ] || ssh-keygen -q -f .ssh/id_rsa -N ''
docker run -a -i -t base sh -c "apt-get install -qq openssh-server ; mkdir -p /root/.ssh ; echo $(cat ~/.ssh/id_rsa.pub) > /root/.ssh/authorized_keys ; mkdir -p /var/run/sshd ; /usr/sbin/sshd -D"

jpetazzo

echo workqueue:workqueue_queue_work > /sys/kernel/debug/tracing/set_event
cat /sys/kernel/debug/tracing/trace_pipe > out.txt
(Leave it running a couple of seconds, then Ctrl+C; this is just to flush the buffer)
cat /sys/kernel/debug/tracing/trace_pipe > out.txt
(Leave it running a couple of seconds, then Ctrl+C; this is to recover the data)
cut -d- -f2 out.txt | awk '{print $1}' | sort | uniq -c | sort -n

jpetazzo

Unionize: network superpowers for your docker containers

Unionize lets you connect together docker containers in arbitrarily complex scenarios.

Note: I recommend to use https://github.com/jpetazzo/pipework instead.

• pipework is a better name than unionize
• it's hosted on a "real" github repo instead of a small gist :-)

Now if you want Unionize, it's still here. Just check those examples.

jpetazzo

from	ubuntu:precise
run	LC_ALL=C DEBIAN_FRONTEND=noninteractive apt-get install -y -q postgresql-9.1 postgresql-contrib-9.1
copy	postgresql.run	/init

jpetazzo

for PID in /proc/[1-9]* ; do echo $(ls $PID/fd | wc -l) $PID $(cat $PID/cmdline) ; done | sort -n