Configuring additional repositories
by Uday R. Sawant, William Leemans, Jonathan Hobson, Oliver Pelz
Linux: Powerful Server Administration
- Linux: Powerful Server Administration
- Table of Contents
- Linux: Powerful Server Administration
- Linux: Powerful Server Administration
- Credits
- Preface
- 1. Module 1
- 1. Managing Users and Groups
- 2. Networking
- Introduction
- Connecting to a network with a static IP
- Installing the DHCP server
- Installing the DNS server
- Hiding behind the proxy with squid
- Being on time with NTP
- Discussing load balancing with HAProxy
- Tuning the TCP stack
- Troubleshooting network connectivity
- Securing remote access with OpenVPN
- Securing a network with uncomplicated firewall
- Securing against brute force attacks
- Discussing Ubuntu security best practices
- 3. Working with Web Servers
- Introduction
- Installing and configuring the Apache web server
- Serving dynamic contents with PHP
- Hosting multiple websites with a virtual domain
- Securing web traffic with HTTPS
- Installing Nginx with PHP_FPM
- Setting Nginx as a reverse proxy
- Load balancing with Nginx
- Setting HTTPs on Nginx
- Benchmarking and performance tuning of Apache
- Securing the web server
- Troubleshooting the web server
- 4. Working with Mail Servers
- 5. Handling Databases
- Introduction
- Installing relational databases with MySQL
- Storing and retrieving data with MySQL
- Importing and exporting bulk data
- Adding users and assigning access rights
- Installing web access for MySQL
- Setting backups
- Optimizing MySQL performance – queries
- Optimizing MySQL performance – configuration
- Creating MySQL replicas for scaling and high availability
- Troubleshooting MySQL
- Installing MongoDB
- Storing and retrieving data with MongoDB
- 6. Network Storage
- 7. Cloud Computing
- 8. Working with Containers
- Introduction
- Installing LXD, the Linux container daemon
- Deploying your first container with LXD
- Managing LXD containers
- Managing LXD containers – advanced options
- Setting resource limits on LXD containers
- Networking with LXD
- Installing Docker
- Starting and managing Docker containers
- Creating images with a Dockerfile
- Understanding Docker volumes
- Deploying WordPress using a Docker network
- Monitoring Docker containers
- Securing Docker containers
- 9. Streaming with Ampache
- 10. Communication Server with XMPP
- 11. Git Hosting
- Introduction
- Installing Git
- Creating a local repository with Git CLI
- Storing file revisions with Git commit
- Synchronizing the repository with a remote server
- Receiving updates with Git pull
- Creating repository clones
- Installing GitLab, your own Git hosting
- Adding users to the GitLab server
- Creating a repository with GitLab
- Automating common tasks with Git hooks
- 12. Collaboration Tools
- 13. Performance Monitoring
- 14. Centralized Authentication Service
- 2. Module 2
- 1. Installing CentOS
- Introduction
- Downloading CentOS and confirming the checksum on Windows or OS X
- Creating USB installation media on Windows or OS X
- Performing an installation of CentOS using the graphical installer
- Running a netinstall over HTTP
- Installing CentOS 7 using a kickstart file
- Getting started and customising the boot loader
- Troubleshooting the system in rescue mode
- Updating the installation and enhancing the minimal install with additional administration and development tools
- 2. Configuring the System
- Introduction
- Navigating text files with less
- Introduction to Vim
- Speaking the right language
- Synchronizing the system clock with NTP and the chrony suite
- Setting your hostname and resolving the network
- Building a static network connection
- Becoming a superuser
- Customizing your system banners and messages
- Priming the kernel
- 3. Managing the System
- Introduction
- Knowing and managing your background services
- Troubleshooting background services
- Tracking system resources with journald
- Configuring journald to make it persistent
- Managing users and their groups
- Scheduling tasks with cron
- Synchronizing files and doing more with rsync
- Maintaining backups and taking snapshots
- Monitoring important server infrastructure
- Taking control with GIT and Subversion
- 4. Managing Packages with YUM
- 5. Administering the Filesystem
- 6. Providing Security
- 7. Building a Network
- 8. Working with FTP
- 9. Working with Domains
- 10. Working with Databases
- 11. Providing Mail Services
- 12. Providing Web Services
- 13. Operating System-Level Virtualization
- 14. Working with SELinux
- 15. Monitoring IT Infrastructure
- 1. Installing CentOS
- 3. Module 3
- 1. Working with KVM Guests
- 2. Deploying RHEL "En Masse"
- 3. Configuring Your Network
- 4. Configuring Your New System
- 5. Using SELinux
- 6. Orchestrating with Ansible
- 7. Puppet Configuration Management
- 8. Yum and Repositories
- 9. Securing RHEL 7
- 10. Monitoring and Performance Tuning
- Bibliography
- Index
Whether you create your own mirror repository or organizations provide software for you in repositories, setting up additional repositories on your RHEL system is quite simple. This recipe will show you how to set them up. Many repositories have their own repo files or even an RPM that automatically installs the repository. When these are available, don't hesitate to use them!
For this to work, you will need to have a repository set up, which can be accessed through the following URL: http://repo.example.com/myrepo/7/x86_64.
In order to create an additional repository, create a file in /etc/yum.repos.d called myrepo.repo, which contains the following information:
[myrepo] name=My Personal Repository baseurl=http://repo.example.com/myrepo/$releasever/$basearch gpgcheck=0 enabled=1
The gpgcheck=1 option only functions if you or the provider of a repo has signed all the RPMs in the repo. This is generally a good practice and provides extra security to your repositories.
The $releasever and $basearch variables allow you to create a single repository file that can work on multiple systems as long as you have a repository for the URLs. The $releasever variable expands to the major version of the OS (7 in our case), and the $basearch will expands to x86_64. On an i386 system (RHEL 7 only comes in the x86_64 architecture), $basearch expands to i386.
You can find many repositories on the Internet, such as epel and elrepo, but it may not always be a good idea to use them. Any software provided by the Red Hat standard repositories are also supported by Red Hat, and they will no longer support you if you start using the same software provided through another repository. So, you better ensure that you don't care about support or have another party that is willing to support you.
Although I do not condone the use of these in production without taking the appropriate support actions, here is a list of some popular repositories that you can use:
The ELRepo repository can be found at:
http://elrepo.org/tiki/tiki-index.php
The EPEL repository is at:
https://fedoraproject.org/wiki/EPEL
The Puppetlabs repositories can be found at:
https://docs.puppetlabs.com/guides/puppetlabs_package_repositories.html
The Zabbix repositories are at the following link:
https://www.zabbix.com/documentation/2.0/manual/installation/install_from_packages
For the RepoForge repositories, refer to the following website:
Remi's repositories can be found at:
http://rpms.famillecollet.com/
The Webtatic repositories are at:
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