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Minikube install guide

Minikube is a lite installation for Kubernetes (K8s). This is a great option for standalone (eg Pre-sales workstation) or low usage environments.

Table of contents

  1. Introduction
  2. Prequisites - Docker & Minikube
  3. Setting up Buzzy on Minikube
  4. Trouble shooting

Introduction

The goal of this guide is to allow you to run our own custom implementation of Buzzy on a local system (eg laptop).

The summary of what we’ll be doing:

  • Get prerequisites defined/installed ie Docker and Minikube
  • Setup Buzzy running on your Minikube environment
  • Install NGINX to optionally allow external access to your local Buzzy server - for example, allowing a mobile phone to connect to the local Buzzy server

Prequisites - Docker & Minikube

Ensure you have a computer with enough disk space - eg 10GB space, obviously, size of files on the server like Map Tiles Caches etc should be taken into account.

  1. You will need to be able to setup 2 DNS entries:
    • External IP - Where ever you see buzzydev1.buzzy.buzz in the settings/documentation. This will be the IP address of the server/aka your dev machine that is accessible by users on the network. For example if this is a 192.168.x.y address of your machine and your device/phone is on the same WIFI in the same subnet.
    • Internal IP represented by buzzydev1.buzzy.buzz in the settings/documentation. You’ll get this for the buzzy-service once you have completed the K8s/Minikube setup below.
  2. Setup an account on docker.com and contact the Buzzy team with the username, so you can get secure access to the docker images
  3. Install Docker - recommend install Docker Community Edition - please follow the instructions for your specific operating system
  4. Install Minikube - see the Getting Started Guide for instructions on installing Minikube for you operating system
  5. Run minikube start - this will start your local Minikube environment. You should be able to verify your Minikube has started by running a command like kubectl get po -A and get a list of processes running. minikube status will give you the status.
  6. Get the K8s dashboard running: (see here for more info)minikube dashboard - this will open your minikube dashboard in your local browser and you should be
  7. Optional - if you intend to access the server from another device, then you need to have a way to define a domain name for the service. There are lots of ways to do this eg editing individual hosts files on each device. On mobile devices, this can be harder. Setting up an external DNS that points to the internal IP addresses is one simple solution. Other solutions include setting it up as part of your local WIFI network.

Setting up Buzzy on Minikube

  1. Clone/download the Buzzy Docs repo - so you can get copies of all the relevant files to install and run Buzzy on your Minikube. Once the repo is cloned/downloaded (upzipped) to your local machine is running, in Terminal go into your buzzy-docs repo/directory and change into the minikube/samples directory/folder.
  2. Create a custom namespace (eg buzzy or whatever you’d like to call your service): kubectl create namespace buzzy; on success you should see namespace/buzzy created. We’ll use this namespace to help separate the Buzzy related services on the K8s system. If you refresh your Minikube dashboard URL (setup above) you should new see the name space listed in the dashboard console.
  3. Create a docker-registry secret with your username/password so can access the docker images mentioned above. Replace the buzzy namespace with your name space you defined: kubectl create secret docker-registry dockerhub --docker-server=docker.io --docker-username=<username> --docker-password=<password> --docker-email=<email> --namespace=buzzy Once created you should get the success message secret/dockerhub created. In you K8s Dashboard screen you can now select the namespace and on the Overview page you should see your secret that has been created.
  4. Now we’re going to enable an ingress, which controls access to the relevant service. In Terminal, execute: minikube addons enable ingress. You should see the success message ingress was successfully enabled and if you execute the command minikube addons list you should see it’s enabled:
      Adams-MacBook-Pro:minikube adamginsburg$ minikube addons list
  - addon-manager: enabled
  - dashboard: enabled
  - default-storageclass: enabled
  - efk: disabled
  - freshpod: disabled
  - gvisor: disabled
  - helm-tiller: disabled
  - ingress: enabled
  - ingress-dns: enabled
  - logviewer: disabled
  - metrics-server: disabled
  - nvidia-driver-installer: disabled
  - nvidia-gpu-device-plugin: disabled
  - registry: disabled
  - registry-creds: disabled
  - storage-provisioner: enabled
  - storage-provisioner-gluster: disabled
  5. Edit your buzzy.yaml file to reflect your settings.
    VariableInfoExample
    ROOT_URLExternal url to your server/machine eg. `https://buzzydev1.somedomain.com`
    MONGO_URLURL to mongo service. In this example it's already setup in Minikube, however this could be changed to point to another Mongo DB instance on the cloud or elsewhere.
    METEOR_SETTINGSThis must be a string that interprets to valid JSON object.Meteor.settings valiables that are not under public are visible to the server only. Anything under Meteor.settings.public will be visible to the client: browser, phone, tablet etc. Be careful not provide any secret confidential settings under publicSee below for specific settings. Please go through each of the settings and fill out as best as possible.
    VariableInfoExample
    Meteor.settings.jwtSecretSet this to a long eg 30+ character random string. IT will be used for encoding JWT secrets on the server

  6. Now we need to run the relevant YAML files that will setup the relevant services. Inside your buzzy-docs\minikube directory/folder you’ll see a lot of yaml files. You can run these one by one or as a batch by running apply_all.sh. If you get a permission denied error when trying to rule ./apply_all.sh then in Terminal do a chmod u+x apply_all.sh and try and run again. If run successfully you should see something like:

     Adams-MacBook-Pro:minikube adamginsburg$ ./apply_all.sh
 persistentvolume/task-pv-volume created
 persistentvolumeclaim/mongo-pv-claim created
 deployment.apps/mongodb created
 service/mongo-service created
 persistentvolume/buzzy-minio created
 persistentvolumeclaim/minio-pv-claim created
 deployment.apps/minio created
 service/minio-service created
 ingress.extensions/minio created
 deployment.apps/buzzy-app created
 service/buzzy-service created
 ingress.extensions/buzzy-ingress created

    You should be able to see the deployments starting successfully in your Minikube dashboard. Note, it may take some time to download and start some fo your services. For trouble shooting, see below. Successful startup

In the terminal type minikube service buzzy-service --url -n buzzy this will give you something like http://192.168.64.9:31836 and if you plug that into a browser you should see the login page… YAY!!! Login page

That means Buzzy is up and running on the internal Minikube environment.

  1. Now we need to make your local Buzzy server available to the outside world, so that other computers/devices can access it. This is an optional step, as you can already access you server from you machine. If you don’t need external access you can stop here. Firstly we’re going to create a Minikube tunnel - open a new terminal tab and type minikube tunnel. You should now be able to access your server in the browser from its Cluster IP which can be found under Servicesin the K8s Dashboard.

  2. The next step is passing external network traffic to the Minikube ingress and services. For this we’ll use NGINX. Note there will be other ways to do this, but this is one that works. Please install NGINX which will give access to your computer and the Minikube services to the outside world. Next we’ll need to edit the NGINX conf file to pass traffic to the server. Find your default NGINX file and make it look like , replacing buzzydev1.buzzy.buzz with your external DNS entry that points to you machines IP and buzzydemo.buzzy.buzz with your internal DNS entry for your ingress.

    
   #user  nobody;
   worker_processes  1;

   #error_log  logs/error.log;
   #error_log  logs/error.log  notice;
   #error_log  logs/error.log  info;

   #pid        logs/nginx.pid;

   events {
       worker_connections  1024;
   }

   http {
       include       mime.types;
       default_type  application/octet-stream;

       log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                         '$status $body_bytes_sent "$http_referer" '
                         '"$http_user_agent" "$http_x_forwarded_for"';

       access_log  /usr/local/etc/nginx/logs/access.log  main;
       error_log   /usr/local/etc/nginx/logs/error.log;

       sendfile        on;
       #tcp_nopush     on;

       #keepalive_timeout  0;
       keepalive_timeout  65;

       #gzip  on;

       server {
           listen       80;
           server_name  buzzydev1.buzzy.buzz;

           #charset koi8-r;

           access_log  /usr/local/etc/nginx/logs/host.access.log  main;

           location / {
               proxy_http_version 1.1;
               proxy_set_header Upgrade $http_upgrade;
               proxy_set_header Connection "upgrade";
               proxy_redirect off;
               proxy_buffer_size 256k;
               proxy_buffers 8 256k;
               proxy_busy_buffers_size 512k;
               proxy_pass_request_headers on;
               proxy_set_header Host $host;
               proxy_set_header X-Real-IP $remote_addr;
               proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
               proxy_pass http://buzzydemo.buzzy.buzz;
           }

           #error_page  404              /404.html;

           # redirect server error pages to the static page /50x.html
           #
           error_page   500 502 503 504  /50x.html;
           location = /50x.html {
               root   html;
           }

           # proxy the PHP scripts to Apache listening on 127.0.0.1:80
           #
           #location ~ \.php$ {
           #    proxy_pass   http://127.0.0.1;
           #}

           # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
           #
           #location ~ \.php$ {
           #    root           html;
           #    fastcgi_pass   127.0.0.1:9000;
           #    fastcgi_index  index.php;
           #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
           #    include        fastcgi_params;
           #}

           # deny access to .htaccess files, if Apache's document root
           # concurs with nginx's one
           #
           #location ~ /\.ht {
           #    deny  all;
           #}
       }


       # another virtual host using mix of IP-, name-, and port-based configuration
       #
       #server {
       #    listen       8000;
       #    listen       somename:8080;
       #    server_name  somename  alias  another.alias;

       #    location / {
       #        root   html;
       #        index  index.html index.htm;
       #    }
       #}


       # HTTPS server
       #
       #server {
       #    listen       443 ssl;
       #    server_name  localhost;

       #    ssl_certificate      cert.pem;
       #    ssl_certificate_key  cert.key;

       #    ssl_session_cache    shared:SSL:1m;
       #    ssl_session_timeout  5m;

       #    ssl_ciphers  HIGH:!aNULL:!MD5;
       #    ssl_prefer_server_ciphers  on;

       #    location / {
       #        root   html;
       #        index  index.html index.htm;
       #    }
       #}
       include servers/*;
   }

Now run NGINX ex - eg on mac sudo nginx and if you need to stop it sudo nginx -s stop

Trouble shooting

Trouble shooting: For example if the buzzy service has not started:

Failed startup of service

Find the pod or service that’s failing in the Dashboard. In the Terminal type kubectl logs <ID of the pod/service buzzy-app-59d9d786dc-kbsdx>

This should show you some logs, that will help you debug the specific issue. It’s probably going to be an issue in the buzzy.yaml file.

Stop the specific service, for example to stop the buzzy service kubectl delete -f ./8_buzzy.yaml, you should see the service disappear from the K8s dashboard. Then fix the YAML and just reload/apply that specific YAML, for example: kubectl apply -f ./8_buzzy.yaml and check the Dashboard to see if there service has started successfully.

Debugging mongo

Login in to the mongodb pod with something like kubectl exec -it mongodb-758868b55b-5mj2k -n buzzy bash

That should give you a shell into the Mongo pod. Now type mongo, which should open a mongo shell. Type help for mongo shell commands eg show dbs and you should see a buzzy db. You can then use buzzy and perform queries and updated from the console.