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103 lines
3.3 KiB
Groff
103 lines
3.3 KiB
Groff
.TH CAUTHTOOL 8
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.SH NAME
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cauthtool \- ceph keyring manipulation tool
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.SH SYNOPSIS
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.B cauthtool
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\fIkeyringfile\fP
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[ \fB\-l\fR | \fB\-\-list\fR ]
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[ \fB\-c\fR | \fB\-\-create-keyring\fR ]
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[ \fB\-p\fR | \fB\-\-print\fR ]
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[ \fB\-n\fR | \fB\-\-name\fR \fIentityname\fP ]
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[ \fB\-\-gen-key\fR ]
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[ \fB\-a\fR | \fB\-\-add-key \fIbase64_key\fP ]
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[ \fB\-\-caps\fR \fIcapfils\fP ]
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.SH DESCRIPTION
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.B cauthtool
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is a utility to create, view, and modify a Ceph keyring file. A keyring
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file stores one or more Ceph authentication keys and possibly an
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associated capability specification. Each key is associated with an
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entity name, of the form \fI{client,mon,mds,osd}.name\fP.
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.SH OPTIONS
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.TP
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\fB\-l\fP, \fB\-\-list\fP
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will list all keys and capabilities present in the keyring.
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.TP
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\fB\-p\fP, \fB\-\-print\fP
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will print an encoded key for the specified \fIentityname\fP. This is suitable for the mount -o secret= argument.
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.TP
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\fB\-c\fP, \fB\-\-create-keyring\fP
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will create a new keyring, overwriting any existing \fIkeyringfile\fP.
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.TP
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\fB\-\-gen\-key\fP
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will generate a new secret key for the specified \fIentityname\fP:
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.TP
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\fB\-\-add\-key\fP
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will add an encoded key to the keyring.
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.TP
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\fB\-\-cap\fI subsystem capability \fP
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will set the capability for given subsystem.
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.TP
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\fB\-\-caps\fI capsfile \fP
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will set all of capabilities associated with a given key, for all subsystems.
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.SH CAPABILITIES
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The \fIsubsystem\fP is the name of a Ceph subsystem: mon, mds, or osd.
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.PP
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The \fIcapability\fP is a string describing what the given user is
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allowed to do. This takes the form of a comma separated list of
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allow, deny clauses with a permission specifier containing one or more
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of \fIrwx\fP for read, write, and execute permission. The "allow *" grants
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full superuser permissions for the given subsystem.
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.PP
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For example,
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.IP
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osd = "allow rwx [pool=foo[,bar]]|[uid=baz[,bay]]" # can read, write, and execute objects
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.IP
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mds = "allow" # can access mds server
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.IP
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mon = "allow rwx" # can modify cluster state (i.e., is a server daemon)
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.PP
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A librados user restricted to a single pool might look like
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.IP
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osd = "allow rw pool foo"
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.PP
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A client mounting the file system with minimal permissions would need caps like
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.IP
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mds = "allow"
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.IP
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osd = "allow rw pool=data"
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.IP
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mon = "allow r"
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.PP
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.SH CAPS FILE FORMAT
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The caps file format consists of zero or more key/value pairs, one per line. The key and value are separated by an '=', and the value must be quoted (with ' or ") if it contains any whitespace. The key is the name of the Ceph
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subsystem (osd, mds, mon), and the value is the capability string (see above).
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.SH EXAMPLE
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To create a new keyring containing a key for \fIclient.foo\fP:
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.IP
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cauthtool -c -n client.foo --gen-key keyring.bin
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.PP
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To associate some capabilities with the key (namely, the ability to mount a Ceph filesystem):
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.IP
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cauthtool -n client.foo --cap mds 'allow' --cap osd 'allow rw pool=data' --cap mon 'allow r' keyring.bin
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.PP
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To display the contents of the keyring:
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.IP
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cauthtool -l keyring.bin
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.PP
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When mount a Ceph file system, you can grab the appropriately encoded secret key with
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.IP
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mount -t ceph serverhost:/ mountpoint -o name=foo,secret=`cauthtool -p -n client.foo keyring.bin`
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.PP
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.SH AVAILABILITY
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.B cauthtool
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is part of the Ceph distributed file system. Please refer to the Ceph wiki at
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http://ceph.newdream.net/wiki for more information.
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.SH SEE ALSO
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.BR ceph (8)
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