A Technical I.T./DevOps Blog
Problem scenario
You want to use Puppet to deploy Docker to a RHEL server in AWS. How do you do this?
Solution
Warning: This may not work for Puppet versions 5 or higher. It should work for Puppet version 4 or lower. This solution is not a best practice. It is quick way to deploy a version of Docker made for CentOS to RHEL instances.
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Continue reading “How Do You Deploy Docker to RedHat Linux Servers Using Puppet?”
Update on 12/4/17
If you want to install Puppet Agent 5.x (a much newer version), see this posting instead.
Problem scenario
You installed Puppet Master on an AWS instance of RedHat Enterprise Linux. (See this link if you want to install Puppet Master). You now want another AWS instance of RHEL 7.x to be configured as a Puppet Agent node. You want to run a manifest to make sure that this new Puppet Agent node (i.e.,
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Continue reading “How Do You Deploy Puppet Agent 3.x to a RedHat Linux Instance in AWS?”
Problem scenario
You want to install Puppet Master on RHEL 7.x running in AWS. You only have five minutes to complete this task. How do you install Puppet Master immediately?
Solution
1. Create puppetinstaller.sh in the /tmp directory. It should have the following lines (stop before you get to step #2):
#!/bin/bash
# Written by continualintegration.com
yum -y install ntp
echo ‘
server 0.us.pool.ntp.org
server 1.us.pool.ntp.org
server 2.us.pool.ntp.org
server 3.us.pool.ntp.org’ >>
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Continue reading “How Do You Install Puppet Master on a RedHat Linux Server (an AWS Instance)?”
Problem scenario
Using different package managers can lead to dependencies being met while systems administrators will encounter error messages that detect, find or determine something to the contrary (e.g., false unmet dependency errors or conditions). Some enterprise policies disallow the pip command. How do you set up the AWS CLI on a Linux server without the pip command?
Solution (Part 1 and Part 2)
Prerequisites
i.
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Updated on 4/15/18
Problem scenario
You installed Puppet Master on an AWS instance of Linux. (See this link if you want to install Puppet Master on Ubuntu. If you want to install Puppet Master on a Red Hat Enterprise Linux server, see this link). You now want an AWS instance of Ubuntu to be configured as a Puppet Agent node with open source Puppet version 5.
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Continue reading “How Do You Deploy Puppet Agent to an Ubuntu 16 Linux Server in AWS?”
Updated 12/1/17
Problem scenario
You need to install open source Puppet version 5 on a server to become a Puppet Master. You have an AWS Ubuntu Linux server. You only have five minutes to do it. How do you install Puppet Master immediately?
Solution
1. Create puppetinstaller.sh in the /tmp directory. It should have the following lines (stop before you get to step #2):
#!/bin/bash
# Written by continualintegration.com
apt-get update
apt-get -y install ntp
echo ‘
server 0.us.pool.ntp.org
server 1.us.pool.ntp.org
server 2.us.pool.ntp.org
server 3.us.pool.ntp.org’ >>
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Continue reading “How Do You Install Puppet Master on an AWS Instance of Ubuntu 16?”
Problem scenario
You want to create an exception to your GCP firewall to allow connectivity from a different workstation or server. What should you do?
Solution
1. In the upper right hand corner of the console, click the icon with three horizontal bars. This is the “Products and Services” button. Then go to “VPC Network” -“Firewall Rules.”
2. Click “Create Firewall Rule.”
3.
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Continue reading “How Do You Change a Firewall Rule in Google Cloud Platform?”
Problem scenario
Using a RHEL server in AWS, you try this command “npm -v”, and it shows that npm is not installed. You want to use the npm utility or you want Node.js to be installed on your RedHat version 7 Linux server in AWS. You may have tried various yum commands but received errors about dependencies. Various other scripts fail to get npm to be a recognized command. How do you install npm and/or Node.js without changing yum repositories and without using the wget command?
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Continue reading “How Do You Install Npm and/or node.js on a AWS Instance of RHEL?”
Problem scenario
You are using AWS via web browser while using multiple Putty sessions are you logged into several AWS servers (aka AWS instances). You can find the host names and internal IP addresses of the servers when you are logged into via the command line of the OS itself. From the AWS console you can find external IP addresses and external FQDNs. You do not know how to correlate these instances (as the information readily available in Putty at the OS level is independent of the information available via the AWS console).
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Continue reading “How Do You Find You out the AWS Instance ID from inside the OS of a Server?”
Problem scenario
You are using a Linux SUSE server in AWS. You want to install Vagrant. What do you do?
Solution
Run these commands:
cd /tmp
sudo curl https://releases.hashicorp.com/vagrant/1.8.1/vagrant_1.8.1_x86_64.rpm > vagrant_1.8.1_x86_64.rpm
sudo zypper -n install vagrant_1.8.1_x86_64.rpm
To verify the installation, run this command: vagrant version
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Continue reading “How Do You Install Vagrant on an AWS Instance of SUSE?”