Sysadmin - Karma Computing (Page 2)

Karma Computing

Sign in Subscribe

Sysadmin

A collection of 39 posts

Scaling Kubernetes ReadWriteMany Ceph Deployments

Scaling Kubernetes ReadWriteMany Ceph Deployments

Run ReadWriteMany volumes on Google Kubernetes engine which allows your Deployments with persistent data to scale. This allows us to scale a Kubernetes deployment with Persistent Volumes without the deployment getting stuck waiting for a realease on a volume. This tutotial has a repo which has been pinned as a

Kubernetes SSL Certificates- How to Set-up a Cluster With SSL Termination

Kubernetes SSL Certificates- How to Set-up a Cluster With SSL Termination

Using Cert Manager on a Kubernetes cluster to do SSL termination. By the end of this guide you will be able to: * Route SSL traffic from a domain your own (example.com) to a kubernetes cluster * Understand how to add additional domains to your cluster * Certificate renewal is automatic, handled

Building Non Root Docker Images OpenShift

Building Non Root Docker Images OpenShift

* Bummer: You can rarely use an existing Dockerhub image and run it on OpenShift out the box. * Although with good intentions, this is a massive blow to developer experience coming from standard Kubernetes which is probably hindering adoption of OpenShift in the wider community * Openshift ignores the USER directive of

Installing Rocketchat Self Hosting Debian 9.6 (Ubuntu) with Docker

Installing Rocketchat Self Hosting Debian 9.6 (Ubuntu) with Docker

https://rocket.chat/docs/installation/manual-installation/debian/ Follow standard install steps First follow the Rocket install guide for Debian. Install Nginx sudo apt install nginx -y # Enable and start nginx sudo systemctl enable nginx && sudo systemctl start nginx Letsencrypt Add stretch-backports to sources list: echo "deb http://ftp.debian.org/

High Availability with HAproxy , Apache2 and MariaDB Galera Cluster Ubuntu 18.04 LTS & Centos 7

High Availability with HAproxy , Apache2 and MariaDB Galera Cluster Ubuntu 18.04 LTS & Centos 7

In this post we create a highly available web & database cluster using a compbination of: * MariaDB Galera Cluster of three nodes on Ubuntu 18.04 * HAproxy for load balancing (requests enter at this endpoint) on Centos 7 * Two Apache2 instancesfor web server(s) The config was used in a real

How to set-up .app domains with ssl and apache

How to set-up .app domains with ssl and apache

Get a new shiny .app domain name Google sells .app domains, and many other registrars. The key thing with .app domains is they must be served over https for browsers to load it. This means you must set-up an ssl certificate. Add an A record pointing to your web server

Quickest way to find active php.ini

Quickest way to find active php.ini

How to quickly find active php.ini file? You're administering a system you're not familir with (?) and need to quikly know the location of the active `php.ini` file. Simply run from command line: php -ini The above will out put the location of the active php -ini file, along

How to host ghost 1.x with multiple blog instances

How to host ghost 1.x with multiple blog instances

Requirements: * Install ghost without ghost cli (it's not needed for this) * We use sqlite3 (but you can easily change this for mysql if needed * Apache2 with * mod_macro installed & enabled The steps are summarized as the following: 1. Install and enable mod_macro 2. Write one apache config for all

Upgrading from old ghost to ghost 1.x without CLI

Upgrading from old ghost to ghost 1.x without CLI

This builds on the super helpful posts by Kevin, and Tom post on the same topic. We run multiple light-traffic ghost instances at Karma Computing, so the Ghost CLI isn't really helpful for our use-case because it dosn't allow multiple instances (yet). This post exmplains how to install Ghost without

How to create MongoDB Replica Set with Authentication Ubuntu 16.04

How to create MongoDB Replica Set with Authentication Ubuntu 16.04

How to make a MongoDB replica set A three member mongodb replica set on three separate hosts with authentication. Also see official docs. In this tutorial we're putting MongoDB on three different hosts. We generate and use keyfile. The keyfile gets used as part of a Salted Challenge Response Authentication

Installing Mongodb Ubuntu 16.04

Installing Mongodb Ubuntu 16.04

See Official MongoDB install docs for all platforms. See getting started with MongoDB for an overview of what MongoDB is. 1. Import Key sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5 2. Create List file echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/

Getting Started With Mongodb

The objective of this post is to document getting stated with MongoDB working up to replication (aka replica sets in Mongodb) and eventually sharding to allow arbitrarily adding storage capacity (shards) to the system. For a good general overview of these types of systems see Tim Berglund's talk on Four

Deploying Gitlab with Apache on Ubuntu 16.04

Deploying Gitlab with Apache on Ubuntu 16.04

1) Install dependencies sudo apt-get install apache2; sudo apt-get install curl openssh-server ca-certificates postfix 2) Download & Install Gitlab curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash sudo apt-get install gitlab-ce 3) Configure gitlab sudo gitlab-ctl reconfigure 4) Configure Gitlab to use Apache sudo

Easily Automate Mass Virtual Hosting With Apache & mod_macro

Easily Automate Mass Virtual Hosting With Apache & mod_macro

> How do I configure Apache2 with mod_macro to automate VirtualHost configs? Virtual Hosting is great fun once you've mastered the Virtual Host directive [https://httpd.apache.org/docs/2.4/mod/core.html#virtualhost] in Apache. It's quick to then realise that most sites basically require the same virtual

Collect recurring payments with Subscribie