Go has a debugger—and it’s awesome!
Something that often, uh... bugs1 Go developers is the lack of a proper debugger. Sure, builds are ridiculously fast and easy, and println(hex.Dump(b)) is your friend, but sometimes it would be nice to just set a breakpoint and step through that endless if chain or print a bunch of values without recompiling ten times.
CC BY 2.0 image by Carl Milner
You could try to use some dirty gdb hacks that will work if you built your binary with a certain linker and ran it on some architectures when the moon was in a waxing crescent phase, but let's be honest, it isn't an enjoyable experience.
Well, worry no more! godebug is here!
godebug is an awesome cross-platform debugger created by the Mailgun team. You can read their introduction for some under-the-hood details, but here's the cool bit: instead of wrestling with half a dozen different ptrace interfaces that would not be portable, godebug rewrites your source code and injects function calls like godebug.Line on every line, godebug.Declare at every variable declaration, and godebug.SetTrace for breakpoints (i.e. wherever you type _ = "breakpoint").
I find this solution brilliant. What you get out Continue reading
Anger
"I suppose that when one hears a tale of hideous cruelty anger is quite the wrong reaction, and merely wastes the energy that ought to go in a different direction: perhaps merely dulls the conscience which, if it were awake, would ask us, “Well, what are you doing about it? How much of your live have you spent in really combating this?”
" C.S. Lewis —
Another Spectacular Layer-2 Failure
Matjaž Straus started the SINOG 2 meeting I attended last week with a great story: during the RIPE70 meeting (just as I was flying home), Amsterdam Internet Exchange (AMS-IX) crashed.
Here’s how the AMS-IX failure impacted ATLAS probes (world-wide monitoring system run by RIPE) – no wonder, as RIPE uses AMS-IX for their connectivity.
Read more ...My CCNP Lab Rack
I've been working on putting together an isolated network lab for testing/practicing/studying at work. One of my coworkers managed toMessage Queues: RabbitMQ in Go and Python
I’ve been playing around with various message queue implementations for a few projects, and wanted to write a quick post on some basics.
Message Queues
Before we get into the detail of RabbitMQ, it’s worth briefly defining exactly what a message queue is, of which RabbitMQ is just one implementation.
You may have heard message queues described as a “Publish/Subscribe” system, or “Pub/Sub” for short. This is a style of communication between software elements, where some components publish messages onto a queue, and others subscribe to that queue and listen for messages published on to it.
We’ll use Twitter as an illustrative analogy. I sent a link to this blog article within a tweet this morning. I did not address this tweet to anyone in particular, I just put it out there, assuming it was useful to at least somebody. Those that follow me saw this tweet, and made a decision to do something with this information or not. In this scenario, I was the publisher, and my followers were subscribers. Message Queues work very much the same way, but they also provide a much greater level of granularity for how to publish messages and subscribe to them.
Application developers Continue reading
Message Queues: RabbitMQ in Go and Python
I’ve been playing around with various message queue implementations for a few projects, and wanted to write a quick post on some basics.
Message Queues
Before we get into the detail of RabbitMQ, it’s worth briefly defining exactly what a message queue is, of which RabbitMQ is just one implementation.
You may have heard message queues described as a “Publish/Subscribe” system, or “Pub/Sub” for short. This is a style of communication between software elements, where some components publish messages onto a queue, and others subscribe to that queue and listen for messages published on to it.
We’ll use Twitter as an illustrative analogy. I sent a link to this blog article within a tweet this morning. I did not address this tweet to anyone in particular, I just put it out there, assuming it was useful to at least somebody. Those that follow me saw this tweet, and made a decision to do something with this information or not. In this scenario, I was the publisher, and my followers were subscribers. Message Queues work very much the same way, but they also provide a much greater level of granularity for how to publish messages and subscribe to them.
Application developers Continue reading
Solarwinds THWACKCAMP 2015. IT’S ON!
As SolarWinds’ Head Geek, and a somewhat self-respecting IT professional, I try to retain at least some decorum when I post to GeekDearth of Development Skills Hindering SDN Development
We’ve been looking at the survey data we gathered from 114 attendees of the MPLS SDN World Congress this past March in Paris, andOracle Cloud Services Grow as Overall Revenue Flags
Oracle races against time to pivot to the cloud.
OpenStack in a Box: Breqwatr Launches Cloud IT Service
Startup unveils an OpenStack service in a (literal) box.