A Technical I.T./DevOps Blog
Problem scenario
You want to install Docker. You want directions for installing it with and without making changes to how packages are installed on the Linux server. You want directions that apply to Linux servers in AWS, Azure, or GCP. You want directions that can apply to CentOS/RHEL, SUSE, or Ubuntu. What do you do?
Solution
Find the link below that is the most appropriate for your needs.
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Problem scenario
You want the kubectl command to work on a server running a Red Hat distribution of Linux. How do you install kubectl on a CentOS/RHEL/Fedora Linux server?
Solution
#1 This assumes that you have access to the internet. You can do it with these three commands:
cd /tmp
curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && chmod +x kubectl
sudo mv kubectl /usr/local/bin/
(An alternative way with a .repo file that is more secure would be to use steps #1 through #3 of
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Continue reading “How Do You Install kubectl on a CentOS/RHEL/Fedora of Linux server?”
Problem scenario
You want to set up (install and configure) Graylog from a Docker container. What do you do?
Solution
1. Verify you have a least two processors with this command: cat /proc/cpuinfo | grep -ic processor
Was the output two or more? If so, proceed. If not, get a server with two processors. If you are using an AWS EC-2 instance, see this
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Continue reading “How Do You Deploy Graylog in a Docker Container?”
Problem scenario
You want to monitor Docker containers. Therefore you want to install Sysdig to try it out. How do you pull down a Docker container that has Sysdig installed in it?
Solution
Prerequisites
Docker needs to be installed. If you need to install Docker on a CentOS/RedHat/Fedora distribution, see this posting. If you need to install Docker on a Debian/Ubuntu,
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Continue reading “How Do You Install Sysdig in a New Docker Container to Try It Out?”
Problem scenario
You created your own Docker image. You want to upload it to a repository so it is available to other servers. You want to upload a Docker image from your server into ECR (in AWS). You do not know the name of the repository. How do you do this?
Solution
Prerequisites
a. This assumes that ECR has been set up. If you need assistance,
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Continue reading “How Do You Upload a Docker Image to Amazon Elastic Container Registry?”
Updated on 8/18/19
Problem Scenario
How do you deploy a Kubernetes cluster in Google Cloud Platform?
Solution
There are three ways to do this. (You could use the console in a web browser. A second way is with a command line interface method. A third way is with a REST API.)
Possible solution #1
One way is with the console.
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Continue reading “How Do You Deploy a Kubernetes Cluster in Google Cloud Platform?”
Problem scenario
You want to set up Kubernetes on a server as quickly as possible as a proof-of-concept. You want to create pods without the best practice security mechanisms because you are behind a firewall and in a development environment. How do you quickly install and configure Kubernetes as a development deployment on a single host server?
Solution
1. Install and configure kubelet, kubeadm, kubectl,
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Continue reading “How Do You Get Kubernetes to Work as a Test Instance?”
Problem scenario
You want to install Docker on a Google Cloud Platform virtual machine running RedHat Enterprise Linux. What do you do?
Solution
Run this command: sudo yum -y install docker
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Continue reading “How Do You Install Docker on a GCP VM running RHEL?”
Problem scenario
In an Ubuntu-based Docker container, how do you install MariaDB and start the MariaDB service?
Solution
Run these commands:
sudo apt-get -y update
sudo apt-get -y install vim
sudo apt-get install mariadb-server
sudo service mysql start
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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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