OpenShiftTraining/Übungen_Teil_III.txt at master · thomaswetzler/OpenShiftTraining · GitHub

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+===============================================================================
+ Übungen Einführung OpenShift Teil III
+
+ T-Systems
+ PaaS Training
+ Einführung in OpenShift
+
+===============================================================================

5 - Scaling (optional)
======================

a - Installation Jmeter
=======================
Linux Workstation
   > wget http://mirror.23media.de/apache/jmeter/binaries/apache-jmeter-4.0.tgz
   > gzip -d apache-jmeter-4.0.tgz
   > tar -xvf apache-jmeter-4.0.tar
   > sudo apt-get install default-jre
   > sudo vi /etc/environment
      JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64/"
   > source /etc/environment

b - Resource Limits definieren
==============================
AppAgile Oberfläche
   -> Applications->Deployments
      -> insults
         -> Actions->Edit Resource Limits
Field Name                    | What to enter | Description
------------------------------+---------------+--------------------------------------------------------------------------------------------
CPU Request                   | 1 cores       | The minimum amount of CPU the container is guaranteed.
CPU Limit                     | 2 cores       | The maximum amount of CPU the container is allowed to use when running.
Memory Request                | 1 MB          | The minimum amThe maximum amount of memory the container is allowed to use when running.
Memory Limit                  | 4 GB          | The maximum amount of memory the container is allowed to use when running.

c - Autoscaler konfigurieren
============================
AppAgile Oberfläche
   -> Applications->Deployments
      -> insults
         -> Actions->Edit Autoscaler

Field Name			What to enter	Description
------------------------------+---------------+--------------------------------------------------------------------------
Min Pods                      | 1             | The lower limit for the number of pods that can be set by the autoscaler.
                              |               | If not specified, defaults to 1.
Max Pods                      | 5             | The upper limit for the number of pods that can be set by the autoscaler.
CPU Request Target            | 20 %          | The percentage of the CPU request that each pod should ideally be using.

d - Jmeter aufrufen
===================
Linux Workstation
   > cd ~/apache-jmeter-4.0/bin
   > curl https://github.com/thomaswetzler/ https://raw.githubusercontent.com/thomaswetzler/OpenShiftTraining/blob/master/autoscaling.jmx > autoscaling.jmx
   > ./jmeter -n -t ./autoscaling.jmx -l ./results.jtl

e - Ergebnis
============
AppAgile Oberfläche
   -> Overview

6 - SelfHealing (optional)
==========================

a - Listen Pods
===============
> oc get pods
NAME                           READY     STATUS      RESTARTS   AGE
first-nodejs-example-1-35vx7   1/1       Running     0          2m
first-nodejs-example-1-59gyi   1/1       Running     0          4m
first-nodejs-example-1-build   0/1       Completed   0          20h
first-nodejs-example-1-n5ozj   1/1       Running     0          3m

b - Löschen Pod
===============
> oc delete pod first-nodejs-example-1-n5ozj
pod "first-nodejs-example-1-n5ozj" deleted

c - Ergebnis beobachten
=======================
> watch oc get pods
NAME                           READY     STATUS      RESTARTS   AGE
first-nodejs-example-1-35vx7   1/1       Running     0          4m
first-nodejs-example-1-59gyi   1/1       Running     0          6m
first-nodejs-example-1-build   0/1       Completed   0          20h
first-nodejs-example-1-ezpn3   1/1       Running     0          34s