Configuring Block Storage

Defining Ceph Service Requirements

Select the services required by the cluster. The services required in the block storage scenario include MONs and OSDs.

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cd ..
cp site.yml.sample site.yml
vim site.yml

Defining the Cluster Host Service

Open the hosts file in the ceph-ansible directory.

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vi hosts

Modify the applications on each node in the cluster as required.

Defining the Ceph Cluster Configuration

Modify the all.yml file in the group_vars directory, including:

1. Ceph download mode and version information
2. Basic network information
3. OSD type

Perform the following steps:

1. Open the all.yml file.

   1	vim group_vars/all.yml

2. Modify the configuration in the file as follows:
   • Online Ceph download mode

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     ceph_origin: repository ceph_repository: community ceph_mirror: http://download.ceph.com ceph_stable_release: nautilus ceph_stable_repo: "{{ ceph_mirror }}/rpm-{{ ceph_stable_release }}" ceph_stable_redhat_distro: el7 monitor_interface: enp133s0 journal_size: 5120 public_network: 172.19.106.0/0 cluster_network: 172.19.106.0/0 osd_objectstore: bluestore

     Table 1 describes the parameters.

     Table 1 Parameter description

     Parameter	Description
     monitor_interface	Network interface device ID.
     public_network	Public network IP address and mask.
     cluster_network	Cluster network IP address and mask.

   • Offline Ceph download mode

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     ceph_origin: distro ceph_repository: local ceph_stable_release: nautilus

Defining OSDs

Define the required OSDs by referring to Defining OSDs. After these operations are performed, the block storage deployment environment is ready.