ceph fs #76

Supports: xenial bionic eoan focal groovy
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Ceph is a distributed storage and network file system designed to provide excellent performance, reliability, and scalability.


Ceph is a unified, distributed storage system designed for excellent performance, reliability, and scalability.

The ceph-fs charm deploys the metadata server daemon (MDS) for the Ceph distributed file system (CephFS). It is used in conjunction with the ceph-mon and the ceph-osd charms.

Highly available CephFS is achieved by deploying multiple MDS servers (i.e. multiple ceph-fs units).



This section covers common and/or important configuration options. See file config.yaml for the full list of options, along with their descriptions and default values. A YAML file (e.g. ceph-osd.yaml) is often used to store configuration options. See the Juju documentation for details on configuring applications.


The source option states the software sources. A common value is an OpenStack UCA release (e.g. 'cloud:xenial-queens' or 'cloud:bionic-ussuri'). See Ceph and the UCA. The underlying host's existing apt sources will be used if this option is not specified (this behaviour can be explicitly chosen by using the value of 'distro').


We are assuming a pre-existing Ceph cluster.

To deploy a single MDS node:

juju deploy ceph-fs

Then add a relation to the ceph-mon application:

juju add-relation ceph-fs:ceph-mds ceph-mon:mds


This section lists Juju actions supported by the charm. Actions allow specific operations to be performed on a per-unit basis. To display action descriptions run juju actions ceph-fs. If the charm is not deployed then see file actions.yaml.

  • get-quota
  • remove-quota
  • set-quota


Please report bugs on Launchpad.

For general charm questions refer to the OpenStack Charm Guide.


(string) The IP address and netmask of the public (front-side) network (e.g., If multiple networks are to be used, a space-delimited list of a.b.c.d/x can be provided.
(string) Key ID to import to the apt keyring to support use with arbitary source configuration from outside of Launchpad archives or PPA's.
(int) Mon and OSD debug level. Max is 20.
(boolean) If True enables IPv6 support. The charm will expect network interfaces to be configured with an IPv6 address. If set to False (default) IPv4 is expected. NOTE: these charms do not currently support IPv6 privacy extension. In order for this charm to function correctly, the privacy extension must be disabled and a non-temporary address must be configured/available on your network interface.
(string) Optional configuration to support use of additional sources such as: . - ppa:myteam/ppa - cloud:bionic-ussuri - cloud:xenial-proposed/queens - http://my.archive.com/ubuntu main . The last option should be used in conjunction with the key configuration option.
(boolean) If set to True, supporting services will log to syslog.