SystemTap: Provisioning an AWS EC2-Based Docker Instance

In the first article in our SystemTap series, we learned how to install the powerful diagnostic tool, SystemTap, on an AWS EC2 instance and then wrote our very first “Hello World” script. We now need to explore some of the interesting (and more useful) scripts that come with SystemTap.

Building a SystemTap target environment

To make this article easier to read, we will split it into two parts. In this post, we will provide a Red Hat Enterprise Linux 7 platform container image with Docker on an AWS EC2 instance. After the SystemTap target environment is properly built, the final part will show how to run some serious scripts on a Docker container from its EC2 host to illustrate just how useful SystemTap can be.

Installing Docker on your AWS EC2 instance

To install Docker on an AWS EC2 instance, we’ll enable the “Red Hat Enterprise Linux Server 7 Extra(RPMs)” yum repository that, by default, is disabled.

$ sudo yum repolist disabled
Loaded plugins: amazon-id, rhui-lb
repo id                                                          repo name
rhui-REGION-rhel-server-debug-extras/7Server/x86_64              Red Hat Enterprise Linux Server 7 Extra Debug (Debug RPMs)
rhui-REGION-rhel-server-debug-optional/7Server/x86_64            Red Hat Enterprise Linux Server 7 Optional Debug (Debug RPMs)
rhui-REGION-rhel-server-debug-rh-common/7Server/x86_64           Red Hat Enterprise Linux Server 7 RH Common Debug (Debug RPMs)
rhui-REGION-rhel-server-debug-rhscl/7Server/x86_64               Red Hat Enterprise Linux Server 7 RHSCL Debug (Debug RPMs)
rhui-REGION-rhel-server-debug-supplementary/7Server/x86_64       Red Hat Enterprise Linux Server 7 Supplementary Debug (Debug RPMs)
rhui-REGION-rhel-server-extras/7Server/x86_64                    Red Hat Enterprise Linux Server 7 Extra(RPMs)
rhui-REGION-rhel-server-optional/7Server/x86_64                  Red Hat Enterprise Linux Server 7 Optional (RPMs)
rhui-REGION-rhel-server-releases-source/7Server/x86_64           Red Hat Enterprise Linux Server 7 (SRPMs)
rhui-REGION-rhel-server-rhscl/7Server/x86_64                     Red Hat Enterprise Linux Server 7 RHSCL (RPMs)
rhui-REGION-rhel-server-source-extras/7Server/x86_64             Red Hat Enterprise Linux Server 7 Extra (SRPMs)
rhui-REGION-rhel-server-source-optional/7Server/x86_64           Red Hat Enterprise Linux Server 7 Optional (SRPMs)
rhui-REGION-rhel-server-source-rh-common/7Server/x86_64          Red Hat Enterprise Linux Server 7 RH Common (SRPMs)
rhui-REGION-rhel-server-source-rhscl/7Server/x86_64              Red Hat Enterprise Linux Server 7 RHSCL (SRPMs)
rhui-REGION-rhel-server-source-supplementary/7Server/x86_64      Red Hat Enterprise Linux Server 7 Supplementary (SRPMs)
rhui-REGION-rhel-server-supplementary/7Server/x86_64             Red Hat Enterprise Linux Server 7 Supplementary (RPMs)
repolist: 0

We’ll use the yum-config-manager to enable the repo:

$ sudo yum-config-manager --enable "Red Hat Enterprise Linux Server 7 Extra(RPMs)"

Next, you should search for the Docker package and install it. Yum will take care of its dependencies.

$ sudo yum search docker
Loaded plugins: amazon-id, rhui-lb
rhui-REGION-rhel-server-extras                                                                                    | 2.9 kB  00:00:00
rhui-REGION-rhel-server-releases                                                                                  | 3.7 kB  00:00:00
rhui-REGION-rhel-server-releases-debug                                                                            | 2.9 kB  00:00:00
rhui-REGION-rhel-server-rh-common                                                                                 | 3.8 kB  00:00:00
rhui-REGION-rhel-server-extras/7Server/x86_64/primary_db                                                          |  56 kB  00:00:00
rhui-REGION-rhel-server-extras/7Server/x86_64/updateinfo                                                          |  27 kB  00:00:00
========================================================== N/S matched: docker ==========================================================
docker-logrotate.x86_64 : cron job to run logrotate on docker containers
docker-python.x86_64 : An API client for docker written in Python
docker-registry.noarch : Registry server for Docker
docker-registry.x86_64 : Registry server for Docker
docker-selinux.x86_64 : SELinux policies for Docker
docker.x86_64 : Automates deployment of containerized applications
  Name and summary matches only, use "search all" for everything.
$ sudo yum -y install docker

Once the Docker-related packages are installed, you should enable and start the docker service.

$ sudo systemctl enable docker
ln -s '/usr/lib/systemd/system/docker.service' '/etc/systemd/system/multi-user.target.wants/docker.service'
$ sudo systemctl start docker
$ sudo systemctl status docker
docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled)
   Active: active (running) since Wed 2015-09-16 02:02:26 EDT; 20ms ago
     Docs: http://docs.docker.com
 Main PID: 10738 (docker)
   CGroup: /system.slice/docker.service
           └─10738 /usr/bin/docker -d --selinux-enabled --add-registry registry.access.redhat.com
Sep 16 02:02:00 ip-172-30-0-123.ap-southeast-1.compute.internal systemd[1]: Starting Docker Application Container Engine...
Sep 16 02:02:00 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:00.179717121-04:00" level=inf...k)"
Sep 16 02:02:00 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:00.447391712-04:00" level=err...se"
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.342873074-04:00" level=war....10
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.360314551-04:00" level=inf...se"
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.798683604-04:00" level=inf...t."
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.798853557-04:00" level=inf...e."
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.798869375-04:00" level=inf...on"
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal docker[10738]: time="2015-09-16T02:02:26.798882151-04:00" level=inf...7.1
Sep 16 02:02:26 ip-172-30-0-123.ap-southeast-1.compute.internal systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.

In order to use Docker with the ec2-user normal user, we need to create a docker group and add ourselves in it.

$ sudo groupadd docker
$ sudo usermod -aG docker ec2-user
$ grep ^docker /etc/group
dockerroot:x:995:
docker:x:1001:ec2-user

Provisioning Red Hat Enterprise Linux 7 container with Docker

To provision our container with Docker, pull down the Red Hat Enterprise Linux 7 platform container image from Red Hat.

$ docker pull rhel7
Trying to pull repository registry.access.redhat.com/rhel7 ...
82ad5fa11820: Download complete
Status: Downloaded newer image for registry.access.redhat.com/rhel7:latest

Run docker images to list the container we have downloaded.

$ docker images
REPOSITORY                           TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
registry.access.redhat.com/rhel7     latest              82ad5fa11820        6 days ago          158.3 MB

Let’s do a quick test to see if everything is working.

$ docker run -ti rhel7 /bin/bash
Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.
[root@35f99cabc19a /]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.1 (Maipo)
[root@c8a8740808c0 bin]# df -h
Filesystem                                                                                          Size  Used Avail Use% Mounted on
/dev/mapper/docker-202:2-51421425-c8a8740808c0d41b7294f6f2906543740b7a9b54791b6f5bed6a150616b18dd5  9.8G  213M  9.0G   3% /
tmpfs                                                                                               497M     0  497M   0% /dev
shm                                                                                                  64M     0   64M   0% /dev/shm
tmpfs                                                                                               497M   20K  497M   1% /run/secrets
/dev/xvda2                                                                                           10G  3.6G  6.5G  36% /etc/hosts
[root@c8a8740808c0 bin]#

So far so good! We are now ready to run some real troubleshooting scripts against our VMs…which we’ll describe in the final installment of this series.

If you want to learn more on Docker, this is your go-to course Introduction to Docker.

Introduction to Docker

Avatar

Written by

Eugene Teo

Eugene Teo is a director of security at a US-based technology company. He is interested in applying machine learning techniques to solve problems in the security domain.


Related Posts

Amanda Cross
Amanda Cross
— January 7, 2021

New Content: AWS Terraform, Java Programming Lab Challenges, Azure DP-900 & DP-300 Certification Exam Prep, Plus Plenty More Amazon, Google, Microsoft, and Big Data Courses

This month our Content Team continues building the catalog of courses for everyone learning about AWS, GCP, and Microsoft Azure. In addition, this month’s updates include several Java programming lab challenges and a couple of courses on big data. In total, we released five new learning...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Avatar
Stuart Scott
— December 17, 2020

Where Should You Be Focusing Your AWS Security Efforts?

Another day, another re:Invent session! This time I listened to Stephen Schmidt’s session, “AWS Security: Where we've been, where we're going.” Amongst covering the highlights of AWS security during 2020, a number of newly added AWS features/services were discussed, including: AWS Audit...

Read more
  • AWS
  • AWS re:Invent
  • cloud security
Joe Nemer
Joe Nemer
— December 4, 2020

AWS re:Invent: 2020 Keynote Top Highlights and More

We’ve gotten through the first five days of the special all-virtual 2020 edition of AWS re:Invent. It’s always a really exciting time for practitioners in the field to see what features and services AWS has cooked up for the year ahead.  This year’s conference is a marathon and not a...

Read more
  • AWS
  • AWS Glue Elastic Views
  • AWS re:Invent
Bryony Harrower
Bryony Harrower
— November 6, 2020

WARNING: Great Cloud Content Ahead

At Cloud Academy, content is at the heart of what we do. We work with the world’s leading cloud and operations teams to develop video courses and learning paths that accelerate teams and drive digital transformation. First and foremost, we listen to our customers’ needs and we stay ahea...

Read more
  • AWS
  • Azure
  • content roadmap
  • GCP
Joe Nemer
Joe Nemer
— October 25, 2020

Excelling in AWS, Azure, and Beyond – How Danut Prisacaru Prepares for the Future

Meet Danut Prisacaru. Danut has been a Software Architect for the past 10 years and has been involved in Software Engineering for 30 years. He’s passionate about software and learning, and jokes that coding is basically the only thing he can do well (!). We think his enthusiasm shines t...

Read more
  • AWS
  • careers
  • champions
  • upskilling
Joe Nemer
Joe Nemer
— October 14, 2020

New Content: AWS Data Analytics – Specialty Certification, Azure AI-900 Certification, Plus New Learning Paths, Courses, Labs, and More

This month our Content Team released two big certification Learning Paths: the AWS Certified Data Analytics - Speciality, and the Azure AI Fundamentals AI-900. In total, we released four new Learning Paths, 16 courses, 24 assessments, and 11 labs.  New content on Cloud Academy At any ...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Joe Nemer
Joe Nemer
— September 15, 2020

New Content: Azure DP-100 Certification, Alibaba Cloud Certified Associate Prep, 13 Security Labs, and Much More

This past month our Content Team served up a heaping spoonful of new and updated content. Not only did our experts release the brand new Azure DP-100 Certification Learning Path, but they also created 18 new hands-on labs — and so much more! New content on Cloud Academy At any time, y...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Joe Nemer
Joe Nemer
— August 28, 2020

AWS Certification Practice Exam: What to Expect from Test Questions

If you’re building applications on the AWS cloud or looking to get started in cloud computing, certification is a way to build deep knowledge in key services unique to the AWS platform. AWS currently offers 12 certifications that cover major cloud roles including Solutions Architect, De...

Read more
  • AWS
  • AWS Certifications
Patrick Navarro
Patrick Navarro
— August 25, 2020

Overcoming Unprecedented Business Challenges with AWS

From auto-scaling applications with high availability to video conferencing that’s used by everyone, every day —  cloud technology has never been more popular or in-demand. But what does this mean for experienced cloud professionals and the challenges they face as they carve out a new p...

Read more
  • AWS
  • Cloud Adoption
  • digital transformation
Avatar
Andrew Larkin
— August 18, 2020

Constant Content: Cloud Academy’s Q3 2020 Roadmap

Hello —  Andy Larkin here, VP of Content at Cloud Academy. I am pleased to release our roadmap for the next three months of 2020 — August through October. Let me walk you through the content we have planned for you and how this content can help you gain skills, get certified, and...

Read more
  • alibaba
  • AWS
  • Azure
  • content roadmap
  • Content updates
  • DevOps
  • GCP
  • Google Cloud
  • New content
Alisha Reyes
Alisha Reyes
— August 5, 2020

New Content: Alibaba, Azure AZ-303 and AZ-304, Site Reliability Engineering (SRE) Foundation, Python 3 Programming, 16 Hands-on Labs, and Much More

This month our Content Team did an amazing job at publishing and updating a ton of new content. Not only did our experts release the brand new AZ-303 and AZ-304 Certification Learning Paths, but they also created 16 new hands-on labs — and so much more! New content on Cloud Academy At...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Alisha Reyes
Alisha Reyes
— July 16, 2020

Blog Digest: Which Certifications Should I Get?, The 12 Microsoft Azure Certifications, 6 Ways to Prevent a Data Breach, and More

This month, we were excited to announce that Cloud Academy was recognized in the G2 Summer 2020 reports! These reports highlight the top-rated solutions in the industry, as chosen by the source that matters most: customers. We're grateful to have been nominated as a High Performer in se...

Read more
  • AWS
  • Azure
  • blog digest
  • Certifications
  • Cloud Academy
  • OWASP
  • OWASP Top 10
  • Security
  • VPCs