A Technical I.T./DevOps Blog
Problem scenario
You have heard about Amazon Elastic Container Registry. You want to configure a Docker registry using an AWS PaaS offering. How do you use ECR?
Solution
1. Log into the AWS web console.
2. Go here: https://console.aws.amazon.com/ecs/home#/repositories
3. Click “Get started” if you have never created a repository before. If you have created a repository, skip to the next step.
4.
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Problem scenario
The needs for a server have changed. You now want your AWS EC-2 virtual server to have more CPU and RAM, but you do not want to migrate to a new instance. You can only afford 15 minutes of down time. What should you do to resize the server’s capacity to have more processors and greater memory?
Solution
These basic steps will work if you want to downgrade your server too (to save money).
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Problem scenario
You want to quickly install Terraform on any type of Linux. How do you write a single script that will work on Debian/Ubuntu, CentOS/RedHat/Fedora, or Linux SUSE?
Solution
1. Create a file called terra.sh in /tmp/ with the content below.
#!/bin/bash
# Written by www.continualintegration.com
# Updated in January of 2022
tfv=0.15.5 # Change this version as necessary
distro=$(cat /etc/*-release | grep NAME)
debflag=$(echo $distro | grep -i “ubuntu”)
if [ …
Continue reading “How Do You Install Terraform on any Type of Linux?”
Problem scenario
You want to use a Red Hat Enterprise Linux server to be an FTP server. You have a RHEL instance in AWS. How do you configure this server to serve as an FTP server?
Solution
1. Run this command: sudo yum -y install vsftpd
2. Run the commands below but replace contint with the username of your choice. You will need to respond to a password prompt too.
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Continue reading “How Do You Set up an FTP Server on an RHEL Server Running in AWS?”
Problem scenario
You created an Amazon RDS instance that uses PostgreSQL. How do you connect to it without using the AWS CLI or AWS API from a Windows workstation?
Solution
Prerequisites
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Continue reading “How Do You Connect to an Amazon RDS Instance?”
Problem scenario
You want to test out an Amazon RDS database instance. (You want to use a database PaaS offering and VPC as opposed to EC-2.) What do you do?
Solution
1. Log into the AWS console.
2. Click “Launch a DB instance”
3. Choose the database engine you want (e.g., PostgreSQL). Click “Next”.
4. Click the option for “Dev/Test” and click “Next”.
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Continue reading “How Do You Create an Amazon RDS Database Instance?”
Question
What is Amazon VPC?
Answer
VPC stands for Virtual Private Cloud. For a typical VM in AWS, there are restrictions on IP address assignments. VPC allows you to configure servers and network access points without restrictions. It allows you to leverage AWS with your own network in a separate data center. It is ideal for hybrid clouds or situations where you need full control of networking without the constraints of typical AWS deployments.
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Problem scenario
Some s3cmd commands work fine. But others give you this error:
“ERROR: S3 error: 400 (InvalidRequest): The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.”
What can you do to get s3cmd commands to work consistently?
Solution
Upgrade your s3cmd to a newer version.
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Problem scenario
On a Windows server in AWS, you are trying to download a file with Internet Explorer. You get this error: “Your current security settings do not allow this file to be downloaded.” How do you solve this problem?
Solution
Using Internet Explorer 11, go to Internet Options. Go to the Security tab. Click on “Internet.” Scroll down to “Downloads.” For “File download” (beneath “Downloads”),
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Problem scenario
Recently you deployed Kubernetes to AWS using JuJu. You are now eliminating the Security Groups that it created. You cannot delete a Security Group in AWS. You get an error about the Security Group being associated with one or more network interfaces. You cannot detach the network interface. You even click the “Force detachment” and then click “Yes, Detach.” Nothing works to delete the network interface or remove the Security Group.
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