IBM Spectrum Scale (GPFS) Deployment using Ansible Roles

Ansible project with multiple roles for installing and configuring IBM Spectrum Scale (GPFS).

Table of Contents

Features
Versions
Prerequisites
Installation Instructions
Optional Role Variables
Available Roles
Cluster Membership
Limitations
Troubleshooting
Reporting Issues and Feedback
Contributing Code
Disclaimer
Copyright and License

Features

Infrastructure minimal tested configuration

Pre-built infrastructure (using a static inventory file)
Dynamic inventory file

OS support

Support for RHEL 7 on x86_64, PPC64 and PPC64LE
Support for RHEL 8 on x86_64 and PPC64LE
Support for UBUNTU 20 on x86_64 and PPC64LE
Support for SLES 15 on x86_64 and PPC64LE

Common prerequisites

Disable SELinux (scale_prepare_disable_selinux: true), by default false
Disable firewall (scale_prepare_disable_firewall: true), by default true.
Disable firewall ports
Install and start NTP
Create /etc/hosts mappings
Open firewall ports
Generate SSH key
User must set up base OS repositories

Core Spectrum Scale prerequisites

Install yum-utils package
Install gcc-c++, kernel-devel, make
Install elfutils,elfutils-devel (RHEL8 specific)

Core Spectrum Scale Cluster features

Spectrum Scale Management GUI features

Install Spectrum Scale management GUI packages on GUI designated nodes
maximum 3 management GUI nodes to be configured
Install performance monitoring sensor packages on all Linux nodes
Install performance monitoring packages on all GUI designated nodes
Configure performance monitoring and collectors
Configure HA federated mode collectors

Spectrum Scale Callhome features

Install Spectrum Scale callhome packages on all cluster nodes
Configure callhome

Spectrum Scale CES (SMB and NFS) Protocol supported features (5.0.5.2)

Install Spectrum Scale SMB or NFS on selected cluster nodes
Install Spectrum Scale OBJECT on selected cluster nodes (5.1.1.0)
CES IPV4 or IPV6 support
CES interface mode support

Minimal tested Versions

The following Ansible versions are tested:

2.9 and above

The following IBM Spectrum Scale versions are tested:

5.0.4.0
5.0.4.1
5.0.4.2
5.0.5.X
5.0.5.2 For CES (SMB and NFS)
5.1.0.0
5.1.1.0 with Object

Specific OS requirements:

For CES (SMB/NFS) on SLES15, Python 3 is required.
For CES (OBJECT) RhedHat 8.x is required.

Prerequisites

Users need to have a basic understanding of the Ansible concepts for being able to follow these instructions. Refer to the Ansible User Guide if this is new to you.

Install Ansible on any machine (control node)
```
$ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
$ python get-pip.py
$ pip3 install ansible==2.9
```
Refer to the Ansible Installation Guide for detailed installation instructions.

Note that Python 3 is required for certain functionality of this project to work. Ansible should automatically detect and use Python 3 on managed machines, refer to the Ansible documentation for details and workarounds.
Download Spectrum Scale packages
- A Developer Edition Free Trial is available at this site: https://www.ibm.com/account/reg/us-en/signup?formid=urx-41728
- Customers who have previously purchased Spectrum Scale can obtain entitled versions from IBM Fix Central. Visit https://www.ibm.com/support/fixcentral and search for 'IBM Spectrum Scale (Software defined storage)'.
Create password-less SSH keys between all Spectrum Scale nodes in the cluster

A pre-requisite for installing Spectrum Scale is that password-less SSH must be configured among all nodes in the cluster. Password-less SSH must be configured and verified with FQDN, hostname, and IP of every node to every node.

Example:
```
$ ssh-keygen
$ ssh-copy-id -oStrictHostKeyChecking=no node1.gpfs.net
$ ssh-copy-id -oStrictHostKeyChecking=no node1
$ ssh-copy-id -oStrictHostKeyChecking=no
```
Repeat this process for all nodes to themselves and to all other nodes.

Installation Instructions

Clone ibm-spectrum-scale-install-infra repository to your Ansible control node
```
$ git clone https://github.com/IBM/ibm-spectrum-scale-install-infra.git
```
Change working directory

There are different methods for accessing the roles provided by this project. You can either change your working directory to the cloned repository and create your own files inside this directory (optionally copying examples from the samples/ subdirectory):
```
$ cd ibm-spectrum-scale-install-infra/
```
Alternatively, you can define an Ansible environment variable to make the roles accessible in any external project directory:
```
$ export ANSIBLE_ROLES_PATH=$(pwd)/ibm-spectrum-scale-install-infra/roles/
```
Create Ansible inventory

Define Spectrum Scale nodes in the Ansible inventory (e.g. ./hosts) in the following format:
```
# hosts:
[cluster01]
scale01  scale_cluster_quorum=true   scale_cluster_manager=true
scale02  scale_cluster_quorum=true   scale_cluster_manager=true
scale03  scale_cluster_quorum=true   scale_cluster_manager=false
scale04  scale_cluster_quorum=false  scale_cluster_manager=false
scale05  scale_cluster_quorum=false  scale_cluster_manager=false
```
The above is just a minimal example. It defines Ansible variables directly in the inventory. There are other ways to define variables, such as host variables and group variables.

Numerous variables are available which can be defined in either way to customize the behavior of the roles. Refer to VARIABLES.md for a full list of all supported configuration options.
Create Ansible playbook

The basic Ansible playbook (e.g. ./playbook.yml) looks as follows:
```
# playbook.yml:
---
- hosts: cluster01
  vars:
    - scale_install_localpkg_path: /path/to/Spectrum_Scale_Standard-5.0.4.0-x86_64-Linux-install
  roles:
    - core/precheck
    - core/node
    - core/cluster
    - core/postcheck
```
Again, this is just a minimal example. There are different installation methods available, each offering a specific set of options:
- Installation from (existing) YUM repository (see samples/playbook_repository.yml)
- Installation from remote installation package (see samples/playbook_remotepkg.yml)
- Installation from local installation package (see samples/playbook_localpkg.yml)
- Installation from single directory package path (see samples/playbook_directory.yml)
Refer to VARIABLES.md for a full list of all supported configuration options.
Run the playbook to install and configure the Spectrum Scale cluster
- Using the ansible-playbook command:
```
$ ansible-playbook -i hosts playbook.yml
```
- Using the automation script:
```
$ cd samples/
$ ./ansible.sh
```
  Note: An advantage of using the automation script is that it will generate log files based on the date and the time in the /tmp directory.

Playbook execution screen

Playbook execution starts here:

$ ./ansible.sh
Running #### ansible-playbook -i hosts playbook.yml

PLAY #### [cluster01]
**********************************************************************************************************

TASK #### [Gathering Facts]
**********************************************************************************************************
ok: [scale01]
ok: [scale02]
ok: [scale03]
ok: [scale04]
ok: [scale05]

TASK [common : check | Check Spectrum Scale version]               
*********************************************************************************************************
ok: [scale01]
ok: [scale02]
ok: [scale03]
ok: [scale04]
ok: [scale05]

...

Playbook recap:

#### PLAY RECAP
***************************************************************************************************************
scale01                 : ok=0   changed=65    unreachable=0    failed=0    skipped=0   rescued=0    ignored=0
scale02                 : ok=0   changed=59    unreachable=0    failed=0    skipped=0   rescued=0    ignored=0
scale03                 : ok=0   changed=59    unreachable=0    failed=0    skipped=0   rescued=0    ignored=0
scale04                 : ok=0   changed=59    unreachable=0    failed=0    skipped=0   rescued=0    ignored=0
scale05                 : ok=0   changed=59    unreachable=0    failed=0    skipped=0   rescued=0    ignored=0

Optional Role Variables

Users can define variables to override default values and customize behavior of the roles. Refer to VARIABLES.md for a full list of all supported configuration options.

Additional functionality can be enabled by defining further variables. Browse the examples in the samples/ directory to learn how to:

Configure storage and file systems (see samples/playbook_storage.yml)
Configure node classes and Spectrum Scale configuration attributes (see samples/playbook_nodeclass.yml)
Deploy Spectrum Scale using JSON inventory (see samples/playbook_json_ces.yml)

Available Roles

The following roles are available for you to reuse when assembling your own playbook:

Note that Core GPFS is the only mandatory role, all other roles are optional. Each of the optional roles requires additional configuration variables. Browse the examples in the samples/ directory to learn how to:

Configure Graphical User Interface (GUI) (see samples/playbook_gui.yml)
Configure Protocol Services (SMB & NFS) (see samples/playbook_ces.yml)
Configure Protocol Services (HDFS) (see samples/playbook_ces_hdfs.yml)
Configure Protocol Services (OBJECT) (see samples/playbook_ces_object.yml)
Configure Call Home (see samples/playbook_callhome.yml)
Configure File Audit Logging (see samples/playbook_fileauditlogging.yml)
Configure cluster with daemon and admin network (see samples/daemon_admin_network)

Cluster Membership

All hosts in the play are configured as nodes in the same Spectrum Scale cluster. If you want to add hosts to an existing cluster then add at least one node from that existing cluster to the play.

You can create multiple clusters by running multiple plays.

Limitations

The roles in this project can (currently) be used to create new clusters or extend existing clusters. Similarly, new file systems can be created or extended. But this role does not remove existing nodes, disks, file systems or node classes. This is done on purpose — and this is also the reason why it can not be used, for example, to change the file system pool of a disk. Changing the pool requires you to remove and then re-add the disk from a file system, which is not currently in the scope of this role.

Furthermore, upgrades are not currently in scope of this role. Spectrum Scale supports rolling online upgrades (by taking down one node at a time), but this requires careful planning and monitoring and might require manual intervention in case of unforeseen problems.

Troubleshooting

The roles in this project store configuration files in /var/mmfs/tmp on the first host in the play. These configuration files are kept to determine if definitions have changed since the previous run, and to decide if it's necessary to run certain Spectrum Scale commands (again). When experiencing problems one can simply delete these configuration files from /var/mmfs/tmp in order to clear the cache — doing so forces re-application of all definitions upon the next run. As a downside, the next run may take longer than expected as it might re-run unnecessary Spectrum Scale commands. This will automatically re-generate the cache.

Reporting Issues and Feedback

Please use the issue tracker to ask questions, report bugs and request features.

Contributing Code

We welcome contributions to this project, see CONTRIBUTING.md for more details.

Disclaimer

Please note: all playbooks / modules / resources in this repo are released for use "AS IS" without any warranties of any kind, including, but not limited to their installation, use, or performance. We are not responsible for any damage or charges or data loss incurred with their use. You are responsible for reviewing and testing any scripts you run thoroughly before use in any production environment. This content is subject to change without notice.

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