Remember the kludges needed to make OSPF NSSA areas work correctly? We concluded that saga by showing how the rules of RFC 3101 force a poor ASBR to choose an IP address on one of its OSPF-enabled interfaces as a forwarding address to be used in Type-7 LSA.
What could possibly go wrong with such a “simple” concept?
Read more ...Unlike other programming languages, Go’s runtime doesn’t provide a way to reliably daemonize a service. A system daemon has to supply this functionality. Most distributions ship systemd which would fit the bill. A correct integration with systemd is quite straightforward. There are two interesting aspects: readiness & liveness.
As an example, we will daemonize this service whose goal is to answer requests with nifty 404 errors:
package main import ( "log" "net" "net/http" ) func main() { l, err := net.Listen("tcp", ":8081") if err != nil { log.Panicf("cannot listen: %s", err) } http.Serve(l, nil) }
You can build it with go build 404.go.
Here is the service file, 404.service1:
[Unit] Description=404 micro-service [Service] Type=notify ExecStart=/usr/bin/404 WatchdogSec=30s Restart=on-failure [Install] WantedBy=multi-user.target
The classic way for an Unix daemon to signal its readiness is to daemonize. Technically, this is done by calling fork(2) twice (which also serves other intents). This is a very common task and the BSD systems, as well as some other C libraries, supply a daemon(3) Continue reading
Sublime Text is my current text editor of choice. I won’t go into why I chose it over other tools; instead, I encourage you to have a look for yourself. Installing Sublime Text 3 (ST3) on Fedora 25, though, isn’t as simple as running a dnf install. Fortunately, it’s not a difficult process, but it is a process I wanted to document here for the sake of others.
Here’s the process I followed:
Download the latest tarball of ST3. As of this writing, it was build 3126, so this cURL command accomplishes what you need:
curl -LO https://download.sublimetext.com/sublime_text_3_build_3126_x64.tar.bz2
As build numbers change, though, you’ll want to verify the correct URL for the latest build. (A lot of sites I saw provide hard-coded scripts that help perform this process for you, but don’t account for changes in the download URL.)
Extract the contents of the tarball with tar xvjf sublime_text_3_build_3126_x64.tar.bz2. This will create a directory called “sublime_text_3” with the contents of the tarball.
Install the desktop launcher for ST3 by copying over the .desktop file in the tarball:
sudo cp -rf sublime_text_3/sublime_text.desktop /usr/share/applications/sublime_text.desktop
Edit the desktop launcher to specify the full path Continue reading
Among the major companies that design and sell servers with their own brands, which are called original equipment manufacturers or OEMs, and those that co-design machines with customers and then make them, which are called original design manufacturers or ODMs, Supermicro stands apart. It does not fall precisely into either category. The company makes system components, like motherboards and enclosures, for those who want to build their own systems or those who want to sell systems to others, and it also makes complete systems, sold in onesies or twosies or sold by the hundreds of racks.
Supermicro is also a …
Inside That Big Silicon Valley Hyperscale Supermicro Deal was written by Timothy Prickett Morgan at The Next Platform.
Hi Folks, I know it’s been a few weeks but I assure you I’ve been heads down on good stuff. You’ll get to see much of it on the blog, but also at Red Hat Summit 2017 in Boston, MA if you’re so inclined.
So what will I (and my colleagues) be talking about at “Summit” this year?Well, there are several RHV & KVM specific activities at Summit that I’ll have something to do with, 2 directly and multiple indirectly:
Breakout Session – High Availability for Red Hat Virtualization Manager
This will be my primary presentation on RHV, where I talk about and provide demo’s on RHV Hosted Engine, mostly in the context of HA (why and how), but also in the context of how it’s used in a new Red Hat product… (cue dramatic music..)
Breakout Session – Red Hat Virtualization and KVM Roadmaps
This is my colleagues’ session, and typically standing room only. I may help organize, but the Product Managers (Moran & Yaniv) will knock this out. It lays out the future of both Red Hat Virtualization and the core technology, KVM.
Lightning Talk – Reporting and Metrics Update
Again, my colleague’s session (Yaniv), but Continue reading
Arista is trying to start a grass-roots standards effort for 800 Gb/s optics.
After Cisco's disclosure of a faulty clock signal component, networking pros are dealing with the fallout.