How to Install Your Own Cloud Platform with OpenStack in RHEL/CentOS 7

OpenStack is a free and open-source software platform which provides IAAS (infrastructure-as-a-service) for public and private clouds.

OpenStack platform consists of several inter-related projects that control hardware, storage, networking resources of a datacenter, such as: Compute, Image Service, Block Storage, Identity Service, Networking, Object Storage, Telemetry, Orchestration and Database.

The administration of those components can be managed through the web-based interface or with the help of OpenStack command line.

Install OpenStack in CentOS 7

Install OpenStack in CentOS 7 and RHEL 7

This tutorial will guide you on how you can deploy your own private cloud infrastructure with OpenStack installed on a single node in CentOS 7 or RHEL 7 or Fedora distributions by using rdo repositories, although the deployment can be achieved on multiple nodes.

Requirements

  1. Minimal Installation of CentOS 7
  2. Minimal Installation of RHEL 7

Step 1: Initial System Configurations

1. Before you begin preparing the node in order to deploy your own virtual cloud infrastructure, first login with root account and assure that the system is up to date.

2. Next, issue the ss -tulpn command to list all running services.

# ss -tulpn
List All Running Linux Services

List All Running Linux Services

3. Next, identify, stop, disable and remove unneeded services, mainly postfix, NetworkManager and firewalld. At the end the only daemon that would be running on your machine should be sshd.

# systemctl stop postfix firewalld NetworkManager
# systemctl disable postfix firewalld NetworkManager
# systemctl mask NetworkManager
# yum remove postfix NetworkManager NetworkManager-libnm

4. Completely disable Selinux policy on the machine by issuing the below commands. Also edit /etc/selinux/config file and set SELINUX line from enforcing to disabled as illustrated on the below screenshot.

# setenforce 0
# getenforce
# vi /etc/selinux/config
Disable SELinux

Disable SELinux

5. On the next step using the hostnamectl command to set your Linux system hostname. Replace the FQDN variable accordingly.

# hostnamectl set-hostname cloud.centos.lan
Set Linux System Hostname

Set Linux System Hostname

6. Finally, install ntpdate command in order to synchronize time with a NTP server on your premises near your physical proximity.

# yum install ntpdate 

Step 2: Install OpenStack in CentOS and RHEL

7. OpenStack will be deployed on your Node with the help of PackStack package provided by rdo repository (RPM Distribution of OpenStack).

In order to enable rdo repositories on RHEL 7 run the below command.

# yum install https://www.rdoproject.org/repos/rdo-release.rpm 

On CentOS 7, the Extras repository includes the RPM that actives the OpenStack repository. Extras is already enabled, so you can easily install the RPM to setup the OpenStack repository:

# yum install -y centos-release-openstack-mitaka
# yum update -y

8. Now it’s time to install PackStack package. Packstack represents a utility which facilitates the deployment on multiple nodes for different components of OpenStack via SSH connections and Puppet modules.

Install Packstat package in Linux with the following command:

# yum install  openstack-packstack

9. On the next step generate an answer file for Packstack with the default configurations which will be later edited with the required parameters in order to deploy a standalone installation of Openstack (single node).

The file will be named after the current day timestamp when generated (day, month and year).

# packstack --gen-answer-file='date +"%d.%m.%y"'.conf
# ls
Generate Packstack Answer Configuration File

Generate Packstack Answer Configuration File

10. Now edit the generated answer configuration file with a text editor.

# vi 13.04.16.conf

and replace the following parameters to match the below values. In order to be safe replace the passwords fields accordingly.

CONFIG_NTP_SERVERS=0.ro.pool.ntp.org

Please consult http://www.pool.ntp.org/en/ server list in order to use a public NTP server near your physical location.

Add NTP Server in Packstack

Add NTP Server in Packstack

CONFIG_PROVISION_DEMO=n
Add Provision in Packstack

Add Provision in Packstack

CONFIG_KEYSTONE_ADMIN_PW=your_password  for Admin user
Add Admin Account in Packstack

Add Admin Account in Packstack

Access OpenStack dashboard via HTTP with SSL enabled.

CONFIG_HORIZON_SSL=y
Enable HTTPS for OpenStack

Enable HTTPS for OpenStack

The root password for MySQL server.

CONFIG_MARIADB_PW=mypassword1234
Set MySQL Root Password in OpenStack

Set MySQL Root Password in OpenStack

Setup a password for nagiosadmin user in order to access Nagios web panel.

CONFIG_NAGIOS_PW=nagios1234
Set Nagios Admin Password

Set Nagios Admin Password

11. After you finished editing save and close the file. Also, open SSH server configuration file and uncomment PermitRootLogin line by removing the front hashtag as illustrated on the below screenshot.

# vi /etc/ssh/sshd_config
Enable SSH Root Login

Enable SSH Root Login

Then restart SSH service to reflect changes.

# systemctl restart sshd

Step 3: Start Openstack Installation Using Packstack Answer File

12. Finally start Openstack installation process via the answer file edited above by running the below command syntax:

# packstack --answer-file 13.04.16.conf
Openstack Installation in CentOS

Openstack Installation in Linux

13. Once the installation of OpenStack components is successfully completed, the installer will display a few lines with the local dashboard links for OpenStack and Nagios and the required credentials already configured above in order to login on both panels.

OpenStack Installation Completed

OpenStack Installation Completed

The credentials are also stored under your home directory in keystonerc_admin file.

14. If for some reasons the installation process ends with an error regarding httpd service, open /etc/httpd/conf.d/ssl.conf file and make sure you comment the following line as illustrated below.

#Listen 443 https
Disable HTTPS SSL Port

Disable HTTPS SSL Port

Then restart Apache daemon to apply changes.

# systemctl restart httpd.service

Note: In case you still can’t browse Openstack web panel on port 443 restart the installation process from beginning with the same command issued for the initial deployment.

# packstack --answer-file /root/13.04.16.conf

Step 4: Remotely Access OpenStack Dashboard

15. In order to access OpenStack web panel from a remote host in your LAN navigate to your machine IP Address or FQDN/dashboard via HTTPS protocol.

Due to the fact that you’re using a Self-Signed Certificate issued by an untrusted Certificate Authority an error should be displayed on your browser.

Accept the error and login to the dashboard with the user admin and the password set on CONFIG_KEYSTONE_ADMIN_PW parameter from answer file set above.

https://192.168.1.40/dashboard 
OpenStack Login Dashboard

OpenStack Login Dashboard

Openstack Projects

Openstack Projects

16. Alternatively, if you opted to install Nagios component for OpenStack, you can browse Nagios web panel at the following URI and login with the credentials setup in answer file.

https://192.168.1.40/nagios 
Nagios Login Dashboard

Nagios Login Dashboard

Nagios Linux Monitoring Interface

Nagios Linux Monitoring Interface

That’s all! Now you can start setup your own internal cloud environment. Now follow the next tutorial that will explain how to link the server physical NIC to openstack bridge interface and manage Openstack from web panel.

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Matei Cezar

I'am a computer addicted guy, a fan of open source and linux based system software, have about 4 years experience with Linux distributions desktop, servers and bash scripting.

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86 Responses

  1. MARCELO GUEDES says:

    Thanks for sharing this great tutorial.

    The OpenStack Mitaka do not list on these repos. When i try “yum install -y centos-release-openstack-mitaka“, they can’t find it.

    • Ravi Saive says:

      @Marcelo,

      Have you enabled the following repository under your CentOS 7?

      # yum install https://www.rdoproject.org/repos/rdo-release.rpm 
      
  2. Kowalski says:

    Thanks a lot. I encounter a problem after executing the last command “packstack --answer-file 22.05.19.conf” the error say:

    ERROR: Error appeared during Puppet run:192.168.1.33_controller.pp
    Error:'/usr/sbin/ntpdate time2.aliyun.com' returned 1 instead of one of [0]
    

    I try to change the ntp server, restart ntpdate service, but it doesn’t work.

  3. k.agoudjil says:

    Hi, All,

    After # packstack –answer-file 13.04.16.conf, i have ERROR : Local IP address discovery failed. please set a default Gateway for your system.

    Please need help.

  4. Aayushi Choudhary says:

    ERROR: appeared during puppet run: controller.pp
    error: /stage[main]/Packstack::swift::Storage/Swift::Storage::Loopback[swiftloopback]/Swift::Storage::Ext4[Swiftloopback]/Swift::Storage::Mount[Swiftloopback]/Mount[/srv/node/swiftloopback]: Could not evaluate: Field ‘device’ is required

    getting this error, if anyone can help me out in this.

  5. Harshith Dayanand says:

    Many Thanks Matei Cezar!

    What a perfect procedure to deploy OpenStack!!! i was trying since last few days as per RDO official documentation and every time my installation was failing due to one or the other reason, unable to start nova scheduler, Nova table not found in DB, unable to download something and what not.

    Just completed installing Queens release on CentOS 7.5 (1804) without a single glitch. Thanks again.

    Keep Rocking!

  6. Sodalin Sen says:

    packstack –gen-answer-file=’date +”%d.%m.%y”‘.conf

    ERROR:root:Failed to load plugin from file ssl_001.py
    ERROR:root:Traceback (most recent call last):
    File “/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py”, line 923, in loadPlugins
    moduleobj = __import__(moduleToLoad)
    File “/usr/lib/python2.7/site-packages/packstack/plugins/ssl_001.py”, line 20, in
    from OpenSSL import crypto
    File “/usr/lib/python2.7/site-packages/OpenSSL/__init__.py”, line 8, in
    from OpenSSL import rand, crypto, SSL
    File “/usr/lib/python2.7/site-packages/OpenSSL/crypto.py”, line 13, in
    from cryptography.hazmat.primitives.asymmetric import dsa, rsa
    File “/usr/lib64/python2.7/site-packages/cryptography/hazmat/primitives/asymmetric/rsa.py”, line 14, in
    from cryptography.hazmat.backends.interfaces import RSABackend
    File “/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py”, line 7, in
    import pkg_resources
    ImportError: No module named pkg_resources

    ERROR:root:Traceback (most recent call last):
    File “/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py”, line 988, in main
    loadPlugins()
    File “/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py”, line 931, in loadPlugins
    raise Exception(“Failed to load plugin from file %s” % item)
    Exception: Failed to load plugin from file ssl_001.py

    ERROR : Failed to load plugin from file ssl_001.py
    => Why it show this error?

  7. mike says:

    no selinux, PermitRootLogin, no Firewall… ??? sure??

  8. Dylan Savage says:

    While generating your answer file for packstack you have used single quotations instead of backticks.

    > packstack –gen-answer-file=`date +”%d.%m.%y”`.conf

  9. nareshpandian says:

    192.168.16.28_prescript.pp: [ ERROR ]
    Applying Puppet manifests [ ERROR ]

    ERROR : Error appeared during Puppet run: 192.168.16.28_prescript.pp
    Error: Evaluation Error: Comparison of: String >= Integer, is not possible. Caused by ‘A String is not comparable to a non String’. at /var/tmp/packstack/59912c061d894c9e93dfa6af60edca6d/modules/apache/manifests/version.pp:15:118 on node openstack.example.com

  10. Michael Cooper says:

    This is what I got when I tried to install this:

    [[email protected] ~]# packstack --answer-file answers.conf
    Welcome to the Packstack setup utility
    

    The installation log file is available at: /var/tmp/packstack/20170908-034453-M_777s/openstack-setup.log

    Installing:
    Clean Up                                             [ DONE ]
    Discovering ip protocol version                      [ DONE ]
    Setting up ssh keys                                  [ DONE ]
    Preparing servers                                 [ ERROR ]
    
    ERROR : Failed to run remote script, stdout:
    stderr: /etc/ssh/ssh_config: line 40: Bad configuration option: permitrootlogin
    /etc/ssh/ssh_config: terminating, 1 bad configuration options
    

    Please check log file /var/tmp/packstack/20170908-034453-M_777s/openstack-setup.log for more information

    Additional information:
    * Parameter CONFIG_NAGIOS_INSTALL: Nagios installation option is deprecated and will be removed from packstack in Pike.

    Thanks,
    Michael

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