├── YAKKO-architecture.png ├── openshift-yakko-logo.png ├── openshift-yakko-logo-4.19.png ├── LICENSE └── README.md /YAKKO-architecture.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ozchamo/YAKKO/HEAD/YAKKO-architecture.png -------------------------------------------------------------------------------- /openshift-yakko-logo.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ozchamo/YAKKO/HEAD/openshift-yakko-logo.png -------------------------------------------------------------------------------- /openshift-yakko-logo-4.19.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ozchamo/YAKKO/HEAD/openshift-yakko-logo-4.19.png -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | The GNU General Public License does not permit incorporating your program 651 | into proprietary programs. If your program is a subroutine library, you 652 | may consider it more useful to permit linking proprietary applications with 653 | the library. If this is what you want to do, use the GNU Lesser General 654 | Public License instead of this License. But first, please read 655 | . 656 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # YAKKO 2 | ## [Y]et [A]nother [K]VM [K]onfigurator for [O]penShift 3 | 4 | ## WHAT IS YAKKO? 5 | **The Short Explanation:** YAKKO installs OpenShift on your server running RHEL/Fedora. 6 | 7 | **The Long Explanation:** YAKKO is an "IPI-like" installer for Red Hat OpenShift (IPI = Installer Provisioned Infrastructure). What this means is that the installer also provisions everything! In this case, "everything" sits in one system, which is why there is no Red Hat provided installer for this non-enterpise situation. So, if you want to run up an OpenShift cluster with multiple nodes or why not, a Single Node Cluster ("SNO") and you have a big PC/small server with RHEL or Fedora, then YAKKO might be for you. 8 | 9 | There are plenty of cookbooks out there and they require that you do a lot of *manual* work. **YAKKO avoids it!** If you are a Linux tinkerer with a penchant for the command line and all things Red Hat/Fedora, YAKKO might just be that new friend you were looking for to play with Kubernetes. 10 | 11 | --- 12 | 13 | ## CURRENT VERSION: 9.12 (20251124.2334) 14 | - PROXY!!! Added a new question and install option: built-in logic for supporting servers behind a proxy 15 | - Tested on RHEL 10, RHEL 10.1 and Fedora 43 16 | - Tested with OpenShift 4.20 17 | - Surface kubeconfig to YAKKO directory with read permissions (request fulfilled!) 18 | - Little bug fixes 19 | 20 | And slightly earlier... 21 | - 9.02 - added option 'ops -> changelogo' to pimp your OpenShift console your way! 22 | - Named it 9.0 because there is no guarantee it can be replaced in-place 23 | - Tested on RHEL 9.6, RHEL 10 and Fedora 42 24 | - Tested with OpenShift 4.18 and 4.19 (seems to work all the way to 4.2!) 25 | - Looking much more refined! 26 | - Revamped snapshots, you can take snapshots with active and inactive clusters, so not experimental anymore! 27 | - Added 'startonboot' to 'infra' options - which will enable start-up of the cluster on system boot 28 | - Updated SNO build process as a new stringent check came into place with 4.18.17 29 | All single master clusters (SNO or one master + many workers now build with bootrstrap in place) 30 | - Improved the 'yakko ops emergency' feature - added a "reboot node" option 31 | - Added system info to the regular yakko report (system temperature and RAM available) 32 | - Added GPU report on 'yakko infra describehw' 33 | - General code improvement and cleanup: 34 | - Eliminated code for building clusters using the agent based installer (sorry) 35 | - Eliminated code that would have allowed Mirrored installs (was never used) 36 | - Deleted unused code blocks that had been commented out over time 37 | - A few bugs cleaned up here and there, right? 38 | 39 | **Some of the cool features that have been there a for a while** 40 | - Eliminate the dependency on your physical network by isolating access just to the system that YAKKO is built upon (by using yakko infra changeaccess) 41 | - Adapt to changes in the IP address of the server (e.g. when changing wireless networks!) 42 | - Support for single node/single master clusters (SNOs) since OpenShift 4.10 43 | - Support for installing multiple clusters (but run one at a time!) 44 | - Support for resizing (master/worker) node RAM - on the go! 45 | - Setting up NFS shares for registry and for Namespace/Project storage on your server 46 | - Assigning NFS shares for registry and for Namespace/Project storage 47 | - Purging existing downloaded OpenShift images on disk 48 | - List services and files that are in use by a cluster 49 | - Running post-install tasks 50 | 51 | **What else is in the works?** 52 | - Evaluating 'cloning' a cluster to another directory/disk. Two purposes, making a working copy of a working cluster and possibly transporting a cluster to another system 53 | 54 | **Cool facts** 55 | - YAKKO has built more than 1000 clusters just in testing 56 | - The fastest build was 21 minutes - but that was in the days of fewer operators. This was on a 4-core PC... 57 | - On a well spec'd laptop, a 3+2 OCP 4.19 cluster can take under 31 minutes. Interestingly, SNOs using bootstrap in place can take about as long... 58 | - It is 7,000+ lines of code - but that makes it simple and portable. The build part is likely less than 5,000 lines 59 | - To this day, it can build clusters all the way back to OpenShift 4.2, though you may want to enable the local registry for that (4.1 was only supported on AWS.) 60 | - Resource allowing, it has run up a 3 master, 10 worker cluster! 61 | 62 | --- 63 | ## INTRODUCTION 64 | YAKKO was built around the concept of having ONE script/installer/manager that does it all, using the underlying operating system as the installation/operating platform and resource server/service. As a prime example, YAKKO depends on libvirt/KVM and so it will install and configure required packages on your server to build and run OpenShift VMs, just as it may be used as the DNS resource should you not have your own DNS. Because of this, YAKKO is a bit opinionated, but then again, it's not built for creating "production ready" clusters, and so it should suit most people with a passing need or interest in having an OpenShift cluster around (or... again!) 65 | 66 | Why would you want to run your own (single-box) cluster, isn't that self defeating because there is no real resilience? 67 | - A full cluster at your disposal lets you test full cluster functionality 68 | - You can experiment with multiple node setups in an easy self-hosted lab fashion 69 | - You can easily setup different versions of OpenShift and examine features and compare behaviour 70 | - No public cloud bill... or bill shock! 71 | - You can test your more complex apps on multiple worker nodes 'for real' 72 | - You might be a fan of "self hosting" 73 | - OpenShift Pull Secrets from Red Hat have a lifetime of 60 days, so re-installing is kinda useful 74 | - You can mess with different clusters on the same server (BUT NOTE! Only one cluster running at a time!) 75 | - You can create cheap clusters for experimenting with Red Hat Advanced Cluster Manager (RHACM) 76 | - LEARN without fear or/of consequences! 77 | 78 | In a nutshell, what does YAKKO do? 79 | - Sets up and installs any and all requirements/dependencies for you 80 | - Installs OpenShift in a configuration of your choice: 81 | - Single-node Cluster aka SNO 82 | - Single-master cluster (with multiple workers) 83 | - 3-master cluster ("compact cluster) with no worker nodes 84 | - 3-masters + N-Workers (full blown HA clusters) 85 | - Add worker nodes, on initial build or later 86 | - Builds automatically or in stages 87 | - Leverages the host as bastion / HAProxy / DNS / image/storage server 88 | - Simplifies the networking by using a KVM network behind NAT 89 | - Rolls back individual failed stages so that you can fix if necessary and then keep going or just delete everything you've done so far and start afresh. 90 | (Be careful - It's scary how quickly it does away with a happily running cluster!) 91 | - Adds and destroys worker and infra nodes easily to suit your use case 92 | - Lets you create additional clusters (not just one, BUT you can only run one at a time) 93 | - Overlays basic operational stuff - once you have the cluster up, it will hint you, using 'yakko [infra | ops]' 94 | - Deletes the entire operational cluster you've built, and unconfigure all the above 95 | - But don't worry - you can build again right? Automatically... (try 'yakko rebuildcluster' for this!) 96 | - All of this very tidily - if you stop (or delete) a cluster, it will retire all associated system services files 97 | - It is directory centric: each cluster resides in a different directory and perhaps different versions of YAKKO from other directories/clusters. Best practice is to always go to the directory of the cluster you want and run it from there. 98 | 99 | --- 100 | ## WHAT YAKKO IS NOT 101 | It is not a management tool for OpenShift. It has a small overlay of features to assist in the "automation" of getting things done that may otherwise be repetitive, but once your cluster is up, you can delete YAKKO for all you know, however, since it can do a few things post install (see "Day 2 Ops)" as well as allow you to delete all VMs and the configuration in your system, you should keep it. 102 | 103 | --- 104 | ## REQUIREMENTS 105 | **A single PC/server with:** 106 | - Access to the internet 107 | - RHEL/Fedora as the base installed operating system ("Server with GUI" is convenient, and then YAKKO gives you a working cluster) 108 | - Ports 80 and 443 available (to pass through to your applications in OpenShift) 109 | - OpenShift is RAM hungry, so your results may vary - the below are bare minimums: 110 | - 24GB+ RAM for a single node cluster (good luck though and note that your ability to run apps will be impaired, recommended is 32GB. 111 | - 48GB+ for multi-node clusters (3 master compact cluster) 112 | - 64GB+ for full-HA clusters (3 masters, 2 workers - more than 2 and you may need more memory) 113 | - 2.5GB of disk space for the install files (YAKKO will accumulate older OpenShift versions so keep an eye on the "images" directory within the directory where it resides) 114 | - SSD class storage with capacity as follows: 115 | - 120GB per node (masters or workers) - a typical 3+2 cluster would require 600GB, but as VMs are sparse, you can get away with less 116 | - you can tweak the disk sizes if you must - edit YAKKO and look for MASTERDISKSIZE and WORKERDISKSIZE OR use a template (see 'yakko buildfromtemplate') 117 | - the above are the published requirements, in reality ~80GB per node should be sufficient 118 | - For older versions of OpenShift, YAKKO will not adjust these values down. They are in tune with the latest version unless you change them or use a template 119 | 120 | **Nice to Haves** 121 | - Linux skills - if you are even attempting at using this, you must have some already... 122 | - Project Cockpit is a good (though hungry) friend 123 | - Although YAKKO adds a dnsmasq facility, having your own DNS server that can handle wildcards can be useful for other systems in your lab. If you have this and your clsuter doesn't leave the network, you can always answer 'N' to 'Use YAKKO's DNS service or set USEYAKKODNSMASQ=N in a template 124 | 125 | **What's the test bed?** 126 | YAKKO is built on an Alienware Aurora R6 with an Intel i7-7700 (4c/8t @ 3.6GHz, ~2017) w/64GB RAM and one m.2 512GB SSD. For fun, the largest cluster I have built on it had 6 worker nodes. This machine has seen the build of more than 450 OpenShift clusters with YAKKO! (Is there a Guinness World Record for this?) 127 | The RHEL 9 dev system is a Lenovo Thinkpad P1 Gen-3 with 64GB RAM and 8c/16t Intel i9. 128 | The newer testing system? Courtesy of Red Hat (my employer) a Lenovo P16 Gen-2 with 24 cores and 192 GB RAM (received in May 2025). One of the first test clusters in this system was a 3+10, so 13 nodes in total. a 3+2 takes about 30 minutes here! 25 clusters and counting already. 129 | No, I have never used spinning disk, if you do, I wish you luck. 130 | 131 | **How do I test quickly?** 132 | You'find that YAKKO let's you build clusters in many ways: 133 | This is an excerpt from calling 'yakko help': 134 | ``` 135 | When NO CLUSTER is configured you can call: 136 | yakko (no params) -------------------------> build new cluster - just answer questions 137 | yakko rebuildcluster -----------------------> recreate the last cluster built 138 | yakko buildclusterfromtemplate --> build new cluster from file or URL 139 | yakko buildclusterfromdefaults <#M> <#W> ---> build with all defaults, specifing only 140 | # of masters and # of workers 141 | ``` 142 | 143 | --- 144 | ## HOW TO - INSTALL or "DAY 1" 145 | ### ➜ Watch YAKKO 9.10 build a 1m+2w Cluster (below) 146 | #### (Most bells and whistles: using a proxy server, taking a snapshot at the end, and running a post-cluster-install script) 147 | [![asciicast](https://asciinema.org/a/755136.svg)](https://asciinema.org/a/755136) 148 | #### ➜ [Watch YAKKO 8.0 build a 3m+2w Cluster](https://asciinema.org/a/bMdXbL8o4DLCJUFLAjAo9RvMW) 149 | #### ➜ [Watch (an earlier vesion of) YAKKO in action building OpenShift (video with voiceover)](https://youtu.be/hLsUp7dwxdQ) 150 | #### STEPS 151 | 1) Get the 'yakko' script: 152 | - You can clone the repo (ideally on /tmp) OR 153 | - download it from https://github.com/ozchamo/YAKKO/raw/master/yakko 154 | 2) Run 'yakko' as root (always!) - e.g. `[root@ocphost]# ~/Downloads/yakko` 155 | 3) Choose a destination home directory for YAKKO - **usually /YAKKO** - you will be asked to re-run from there. 156 | 4) After install, quite typically you will: 157 | - cd /YAKKO # (if this is where you installed it) 158 | - ./yakko # (to run it from the directory you're in. Surely you knew this ;) 159 | 4) 'yakko' will start the OpenShift install process when there is no cluster defined, so no further parameters are necessary 160 | 5) Follow instructions, let it run 'AUTOMATICALLY' - you can amend mistakes on the go 161 | 6) Depending on your hardware and desired cluster size you can have a cluster up and running in 30-50 minutes 162 | 7) Until there is no operational cluster, YAKKO will keep asking you to continue the install from where you left off 163 | 8) Once a cluster is operational, YAKKO reports something like this, anytime you run it without parameters: 164 | 165 | ``` 166 | __________________________________________________________________________ 167 | 168 | YAKKO: Yet Another KVM Konfigurator for Openshift (Ver. 9.10) 169 | __________________________________________________________________________ 170 | 171 | CLUSTER: rectest.home (Built: 13-Jun-2024@22:41:36) 172 | YAKKOID: 9848 173 | VERSION: 4.20.2 174 | @REDHAT: https://console.redhat.com/openshift/details/3c45c15e-1e0e-4e0a-a080-9dcb1daeaa41 175 | SUBNET: 192.168.140.0 176 | CERTEXP: Tue 11 Nov 2025 21:54:25 AEST 177 | PURPOSE: This cluster is being built to show ver 9.10 178 | 179 | state 180 | Web Console: [ ✔ ] https://console-openshift-console.apps.rectest.home 181 | API Service: [ ✔ ] https://api.rectest.home:6443 182 | 183 | Active Masters: 3/3 184 | Active Nodes: 2/2 (workers/infra) 185 | Active Operators: 33/33 186 | 187 | Administrator: kubeadmin 188 | Password: 64TbM-Y6TQH-6yMtr-4MGbf 189 | 190 | Registry configuration: none 191 | 192 | External access: ENABLED (to change: yakko infra changeaccess) 193 | 194 | - See yakko command usage --------> yakko usage 195 | - Make infrastructure changes ----> yakko infra 196 | - Make operational changes -------> yakko ops 197 | - Use OpenShift's 'oc' command ---> source /YAKKO-VER8REC/ocp-setup-env 198 | - Cluster command line login -----> /YAKKO-VER8REC/cluster-login 199 | - Basic cluster info web page ----> http://192.168.100.8:8086 200 | - Edit cluster purpose + notes ---> /usr/bin/vim /YAKKO-VER8REC/cluster-notes 201 | - Access cluster externally ------> Add [192.168.100.8] as a DNS server in your clients 202 | (This provides an alternative for when configuring DNS in your network is not possible) 203 | 204 | ``` 205 | --- 206 | ## GENERAL USAGE 207 | The best and quickest way to understand the YAKKO idiosyncrasy is by reading the output of 'yakko usage' or 'yakko help': 208 | 209 | `[root@ocphost YAKKO]# ./yakko usage` 210 | 211 | ``` 212 | __________________________________________________________________________ 213 | 214 | YAKKO: Yet Another KVM Konfigurator for Openshift (Ver. 9.0) 215 | __________________________________________________________________________ 216 | 217 | CLUSTER: mycluster.localdomain (Built: 07-Jul-2025@16:38:04) 218 | YAKKOID: 689229 219 | VERSION: 4.19.2 220 | @REDHAT: https://console.redhat.com/openshift/details/4cf8eb10-b185-439c-b905-9b5b68a5dc60 221 | SUBNET: 192.168.141.0 222 | CERTEXP: Tue 08 Jul 2025 16:08:29 AEST 223 | PURPOSE: test 224 | 225 | state 226 | Web Console: [ ✔ ] https://console-openshift-console.apps.mycluster.localdomain 227 | API Service: [ ✔ ] https://api.mycluster.localdomain:6443 228 | 229 | Active Masters: 3/3 (schedulable) 230 | Active Nodes: 2/2 (workers/infra) 231 | Active Operators: 34/34 232 | 233 | Administrator: kubeadmin 234 | Password: 4gjh4-sSC6g-Szruz-3542w 235 | 236 | Start cluster on host boot: NO 237 | Registry configuration: none 238 | External access: ENABLED (to change: yakko infra changeaccess) 239 | 240 | Free system RAM: 127Gi 241 | CPU temperature: +52.0°C (high = +100.0°C, crit = +100.0°C) 242 | 243 | Additional useful info: 244 | - See yakko command usage --------> yakko usage 245 | - Make infrastructure changes ----> yakko infra 246 | - Make operational changes -------> yakko ops 247 | - Use OpenShift's 'oc' command ---> source /YAKKO-RELEASE-TESTING/ocp-setup-env 248 | - Cluster command line login -----> /YAKKO-RELEASE-TESTING/cluster-login 249 | - Basic cluster info web page ----> http://192.168.100.6:8086 250 | - Edit cluster purpose + notes ---> /usr/bin/vim /YAKKO-RELEASE-TESTING/cluster-notes 251 | - Access cluster externally ------> Add [192.168.100.6] as a DNS server in your clients 252 | (This provides an alternative for when configuring DNS in your network is not possible) 253 | 254 | Calling 'yakko infra' (with no option) will always remind you of the following: 255 | USAGE: yakko infra