Install and configure the storage nodes for Red Hat Enterprise Linux and CentOS

updated: 2017-09-27 04:54

Install and configure the storage nodes for Red Hat Enterprise Linux and CentOS¶

This section describes how to install and configure storage nodes that operate the account, container, and object services. For simplicity, this configuration references two storage nodes, each containing two empty local block storage devices. The instructions use /dev/sdb and /dev/sdc, but you can substitute different values for your particular nodes.

Although Object Storage supports any file system with extended attributes (xattr), testing and benchmarking indicate the best performance and reliability on XFS. For more information on horizontally scaling your environment, see the Deployment Guide.

This section applies to Red Hat Enterprise Linux 7 and CentOS 7.

Prerequisites¶

Before you install and configure the Object Storage service on the storage nodes, you must prepare the storage devices.

Note

Perform these steps on each storage node.

Install the supporting utility packages:
```
# yum install xfsprogs rsync
```

Format the /dev/sdb and /dev/sdc devices as XFS:

# mkfs.xfs /dev/sdb
# mkfs.xfs /dev/sdc

Create the mount point directory structure:

# mkdir -p /srv/node/sdb
# mkdir -p /srv/node/sdc

Edit the /etc/fstab file and add the following to it:

/dev/sdb /srv/node/sdb xfs noatime,nodiratime,nobarrier,logbufs=8 0 2
/dev/sdc /srv/node/sdc xfs noatime,nodiratime,nobarrier,logbufs=8 0 2

Mount the devices:

# mount /srv/node/sdb
# mount /srv/node/sdc

Create or edit the /etc/rsyncd.conf file to contain the following:

uid = swift
gid = swift
log file = /var/log/rsyncd.log
pid file = /var/run/rsyncd.pid
address = MANAGEMENT_INTERFACE_IP_ADDRESS

[account]
max connections = 2
path = /srv/node/
read only = False
lock file = /var/lock/account.lock

[container]
max connections = 2
path = /srv/node/
read only = False
lock file = /var/lock/container.lock

[object]
max connections = 2
path = /srv/node/
read only = False
lock file = /var/lock/object.lock

Replace MANAGEMENT_INTERFACE_IP_ADDRESS with the IP address of the management network on the storage node.

Note

The rsync service requires no authentication, so consider running it on a private network in production environments.

Start the rsyncd service and configure it to start when the system boots:

# systemctl enable rsyncd.service
# systemctl start rsyncd.service

Install and configure components¶

Note

Default configuration files vary by distribution. You might need to add these sections and options rather than modifying existing sections and options. Also, an ellipsis (...) in the configuration snippets indicates potential default configuration options that you should retain.

Note

Perform these steps on each storage node.

Install the packages:

# yum install openstack-swift-account openstack-swift-container \
  openstack-swift-object

Obtain the accounting, container, and object service configuration files from the Object Storage source repository:

# curl -o /etc/swift/account-server.conf https://git.openstack.org/cgit/openstack/swift/plain/etc/account-server.conf-sample?h=stable/mitaka
# curl -o /etc/swift/container-server.conf https://git.openstack.org/cgit/openstack/swift/plain/etc/container-server.conf-sample?h=stable/mitaka
# curl -o /etc/swift/object-server.conf https://git.openstack.org/cgit/openstack/swift/plain/etc/object-server.conf-sample?h=stable/mitaka

Edit the /etc/swift/account-server.conf file and complete the following actions:
- In the [DEFAULT] section, configure the bind IP address, bind port, user, configuration directory, and mount point directory:
```
[DEFAULT]
...
bind_ip = MANAGEMENT_INTERFACE_IP_ADDRESS
bind_port = 6202
user = swift
swift_dir = /etc/swift
devices = /srv/node
mount_check = True
```
  Replace MANAGEMENT_INTERFACE_IP_ADDRESS with the IP address of the management network on the storage node.
- In the [pipeline:main] section, enable the appropriate modules:
```
[pipeline:main]
pipeline = healthcheck recon account-server
```
  Note
  
  For more information on other modules that enable additional features, see the Deployment Guide.
- In the [filter:recon] section, configure the recon (meters) cache directory:
```
[filter:recon]
use = egg:swift#recon
...
recon_cache_path = /var/cache/swift
```
Edit the /etc/swift/container-server.conf file and complete the following actions:
- In the [DEFAULT] section, configure the bind IP address, bind port, user, configuration directory, and mount point directory:
```
[DEFAULT]
...
bind_ip = MANAGEMENT_INTERFACE_IP_ADDRESS
bind_port = 6201
user = swift
swift_dir = /etc/swift
devices = /srv/node
mount_check = True
```
  Replace MANAGEMENT_INTERFACE_IP_ADDRESS with the IP address of the management network on the storage node.
- In the [pipeline:main] section, enable the appropriate modules:
```
[pipeline:main]
pipeline = healthcheck recon container-server
```
  Note
  
  For more information on other modules that enable additional features, see the Deployment Guide.
- In the [filter:recon] section, configure the recon (meters) cache directory:
```
[filter:recon]
use = egg:swift#recon
...
recon_cache_path = /var/cache/swift
```
Edit the /etc/swift/object-server.conf file and complete the following actions:
- In the [DEFAULT] section, configure the bind IP address, bind port, user, configuration directory, and mount point directory:
```
[DEFAULT]
...
bind_ip = MANAGEMENT_INTERFACE_IP_ADDRESS
bind_port = 6200
user = swift
swift_dir = /etc/swift
devices = /srv/node
mount_check = True
```
  Replace MANAGEMENT_INTERFACE_IP_ADDRESS with the IP address of the management network on the storage node.
- In the [pipeline:main] section, enable the appropriate modules:
```
[pipeline:main]
pipeline = healthcheck recon object-server
```
  Note
  
  For more information on other modules that enable additional features, see the Deployment Guide.
- In the [filter:recon] section, configure the recon (meters) cache and lock directories:
```
[filter:recon]
use = egg:swift#recon
...
recon_cache_path = /var/cache/swift
recon_lock_path = /var/lock
```
Ensure proper ownership of the mount point directory structure:
```
# chown -R swift:swift /srv/node
```

Create the recon directory and ensure proper ownership of it:

# mkdir -p /var/cache/swift
# chown -R root:swift /var/cache/swift
# chmod -R 775 /var/cache/swift

updated: 2017-09-27 04:54

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