Category: Public Cloud
Auto-Renew Let’s Encrypt Certs on Linux with Cron
If you want to automatically renew your certs then the easiest way is to setup a cron just to call letsencrypt periodically. Below is an example cron job: First create the bash script to renew the certificate Now enter the script in the following format into nano: Now edit the crontab to run the renew […]
Read more →SCP Files to EC2: Mac & Linux Command Guide
I always forget the syntax of SCP and so this is a short article with a simple example of how to SCP a file from your laptop to your EC2 instance and how to copy it back from EC2 to your laptop: Copying from Laptop to EC2 scp -i identity_file.pem source_file.extention username@public_ipv4_dns:/remote_path scp: Secure copy protocol-i: Identity […]
Read more →How to Backup MySQL on Bitnami WordPress to S3
I recently managed to explode my wordpress site (whilst trying to upgrade PHP). Anyway, luckily I had created an AMI a month ago – but I had written a few articles since then and so wanted to avoid rewriting them. So below is a method to create a backup of your wordpress mysql database to […]
Read more →How to Trigger Autoscaling Events with stress-ng Command
If you are testing how your autoscaling policies respond to CPU load then a really simple way to test this is using the “stress” command. Note: this is a very crude mechanism to test and wherever possible you should try and generate synthetic application load.
Read more →How to Scale Cloud Consumption Without Costly Mistakes
Introduction This article follows on from the “Cloud Migrations Crusade” blog post… A single tenancy datacenter is a fixed scale, fixed price service on a closed network. The costs of the resources in the datacenter are divided up and shared out to the enterprise constituents on a semi-random basis. If anyone uses less resources than […]
Read more →AWS S3 ETags: Verify File Integrity Using MD5 Hashes
I was playing with S3 the other day an I noticed that a file which I had uploaded twice, in two different locations had an identical ETag. This immediately made me think that this tag was some kind of hash. So I had a quick look AWS documentation and this ETag turns out to be […]
Read more →TPC-H Test Data for AWS Redshift and EMR: Setup Guide
If you need to test out your big data tools below is a useful set of scripts that I have used in the past for aws emr and redshift the below might be helpful:
Read more →SSH EC2-User Login Fix for WordPress Bitnami Instances
So after getting frustrated (and even recreating my ec2 instances) due to a “Permission denied (publickey)”, I finally released that the worpress builds by default as set up for SSH using the bitnami account (or at least my build was). This means each time I login using ec2-user I get: Being a limited human being, […]
Read more →AWS Error Messages, API Standards & Region Defaults: Fix Needed
This is a short blog, and its actually just simple a plea to AWS. Please can you do three things? North Virginia appears to be the AWS master node. Having this region as a master region causes a large number of support issues (for example S3, KMS, Cloudfront, ACM all use this pet region and […]
Read more →Public Cloud Migration: Why Lift-and-Shift Strategies Fail
The cloud is hot…. not just a little hot, but smokin hot!! Covid is messing with the economy, customers are battling financially, the macro economic outlook is problematic, vendor costs are high and climbing and security needs more investment every year. What on earth do we do??!! I know…. lets start a crusade – lets […]
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