Mgmt Code Deployment

 Posted on May 24, 2020  |  13 minutes  |  2577 words  |  Felix Frank

Continuing my blog series on figuring out the basics of mgmt networking and etcd, it’s time to tackle one of the most important aspects. At least that’s how I feel about it. After all, it will be nice to show flashy inotify tricks to your team, but eventually you will want the tool to do some actual work. But how? We won’t be launching mgmt manually on each managed node to read the respective code file to run. [Read More]
mgmt  etcd  code 

An Actual Cluster

 Posted on April 2, 2020  |  5 minutes  |  880 words  |  Felix Frank

In this little blog series, I’ve been wrestling with mgmt’s embedded etcd server, trying to get it to form a functioning cluster with mgmt 0.0.21. This finally worked on the local machine, so let’s take the next step and take it to a little network. You never listen Everything starts with the seed server. For mgmt 0.0.21, I’m launching it like this: # mgmt run --tmp-prefix --hostname h1 --ideal-cluster-size 3 yaml examples/yaml/etcd1a. [Read More]
mgmt  etcd  network 

Disentangling Etcd Servers

 Posted on March 15, 2020  |  8 minutes  |  1540 words  |  Felix Frank

In the previous post, you got to watch me try and get to the bottom of a suspected bug in mgmt or its embedded etcd server. What I found was an FAQ entry to match my issue, and some limited knowledge about etcd’s go packages for embedding servers in other software. The FAQ information gave me an idea about what I was seeing. In my first attempt of building a cluster, I had quite faithfully reproduced the commands from the original post that introduced the clustering feature in mgmt. [Read More]
mgmt  etcd  local state  history 

Getting Etcd Back

 Posted on March 9, 2020  |  5 minutes  |  976 words  |  Felix Frank

In the previous post I ran into an issue with the YAML example graphs for the etcd functionality not really working anymore. Coming up with a solution in these graphs was not hard (and in fact proved an opportunity to learn a few things along the way). However, I did not manage to get the cluster up and talking regardless. I accepted the challenge and sat down to try and find out what was wrong with etcd. [Read More]
mgmt  etcd  debugging 

Attempting Some Resource Collecting

 Posted on March 1, 2020  |  8 minutes  |  1524 words  |  Felix Frank

After some adventures building a new feature for mgmt’s Puppet support, and making a presentation including live demos about it, I find myself quite impressed with how far mgmt’s interface and its configuration language have evolved since last I played with them. One thing that I found lacking is the documentation. As the tool is now in a nice shape for people out there to go ahead and give it a spin, I feel that improving the docs will be especially helpful in order to allow early adopters to get a smooth start, without the need to read code or asking James and his contributors for help. [Read More]
mgmt  yaml  graph  etcd  cluster