Citellus

A colleague reported some issues in the OpenShift troubleshooting and diagnosis scripts at OpenShift-checks. Some time ago I did contribute some changes to use functions and allow using the RISU wrapper to the scripts, helping consuming the results via RISU’s HTML interface. As my colleague reported, for some plugins, the output of the command was not shown in the HTML Interface. After some investigation, it was found that parallel execution for the plugins was causing no output to be shown, but when filtering to individual ones via risu -i XXXXXXX/plugin -l it was working fine… the problem was not the check itself, as both of them worked fine when executed individually but failed when executing them together. ...

I wanted to practice a bit Go programing, so I divided that task in two parts, one, adding a golang extension for Citellus and a sample, but working plugin using it. If interested in the code it’s available at the review at https://review.gerrithub.io/c/citellusorg/citellus/+/495622. The final sample code for it has been: // Author: Pablo Iranzo Gómez ([email protected]) // Header for citellus metadata // long_name: Report detected number of CPU's // description: List the processors detected in the system // priority: 200 package main import ( "bufio" "io" "os" "runtime" "strconv" "strings" ) func main() { var OKAY, _ = strconv.Atoi(os.Getenv("RC_OKAY")) var SKIP, _ = strconv.Atoi(os.Getenv("RC_SKIPPED")) var INFO, _ = strconv.Atoi(os.Getenv("RC_INFO")) var CITELLUS_ROOT = os.Getenv("CITELLUS_ROOT") var CITELLUS_LIVE, _ = strconv.Atoi(os.Getenv("CITELLUS_LIVE")) var FAILED, _ = strconv.Atoi(os.Getenv("RC_FAILED")) if CITELLUS_LIVE == 1 { // Report # of CPU's var CPUS = runtime.NumCPU() os.Stderr.WriteString(strconv.Itoa(CPUS)) os.Exit(INFO) } else if CITELLUS_LIVE == 0 { file, err := os.Open(CITELLUS_ROOT + "/proc/cpuinfo") if err != nil { os.Stderr.WriteString("Failure to open required file " + CITELLUS_ROOT + "/proc/cpuinfo") os.Exit(SKIP) } defer file.Close() counts := wordCount(file) os.Stderr.WriteString(strconv.Itoa(counts["processor"])) os.Exit(INFO) } else { os.Stderr.WriteString("Undefined CITELLUS_LIVE status") os.Exit(FAILED) } // Failback case, exiting as OK os.Exit(OKAY) } // https://forgetcode.com/go/2348-count-the-number-of-word-occurrence-in-given-a-file func wordCount(rdr io.Reader) map[string]int { counts := map[string]int{} scanner := bufio.NewScanner(rdr) scanner.Split(bufio.ScanWords) for scanner.Scan() { word := scanner.Text() word = strings.ToLower(word) counts[word]++ } return counts } Of course, lot of googling helped to start building the pieces. ...

After my post about killercoda, I did split my initial scenarios into ‘organizations’. One of them, is in progress to get contributed upstream to KubeVirt project killercoda (still getting some reviews to land on final repo), and the other is under Citellus organization. As the goal was not to lose visits using the prior links, I contacted the team behind killercoda Support (thanks a lot Ben!!) and the requirements to get a ‘redirect’ in place is to: ...

After some time checking the scenarios at https://learn.openshift.com, I decided to give it a try. With the help of Mario Vázquez, author of Getting Started with Kubefed, I did create two scenarios: How to use Citellus on Citellus: Troubleshooting automation KubeVirt on a ‘browser-based’ approach for MiniKube setup for validating KubeVirt: Kubernetes with VM Virtualization (versus the regular containers). You can check how them can be created by looking at their code at: killercoda Scenarios or the ‘playable’ version at https://killercoda.com/iranzo/. ...

Introduction In the article “Contributing to OpenStack” we did cover on how to prepare accounts and prepare your changes for submission upstream (and even how to find low hanging fruits to start contributing). Here, we’ll cover what happens behind the scene to get change published. Upstream workflow Peer review Upstream contributions to OSP and other projects are based on Peer Review, that means that once a new set of code has been submitted, several steps for validation are required/happen before having it implemented. ...