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41 .Nd propagate changes to a Heimdal Kerberos master KDC to slave KDCs
44 .Oo Fl c Ar string \*(Ba Xo
45 .Fl Fl config-file= Ns Ar string
48 .Oo Fl r Ar string \*(Ba Xo
49 .Fl Fl realm= Ns Ar string
52 .Oo Fl k Ar kspec \*(Ba Xo
53 .Fl Fl keytab= Ns Ar kspec
56 .Oo Fl d Ar file \*(Ba Xo
57 .Fl Fl database= Ns Ar file
60 .Op Fl Fl slave-stats-file= Ns Ar file
61 .Op Fl Fl time-missing= Ns Ar time
62 .Op Fl Fl time-gone= Ns Ar time
67 .Oo Fl c Ar string \*(Ba Xo
68 .Fl Fl config-file= Ns Ar string
71 .Oo Fl r Ar string \*(Ba Xo
72 .Fl Fl realm= Ns Ar string
75 .Oo Fl k Ar kspec \*(Ba Xo
76 .Fl Fl keytab= Ns Ar kspec
79 .Op Fl Fl time-lost= Ns Ar time
86 is used to propagate changes to a Heimdal Kerberos database from the
87 master Kerberos server on which it runs to slave Kerberos servers
91 The slaves are specified by the contents of the
93 file in the KDC's database directory, e.g.\&
94 .Pa /var/heimdal/slaves .
95 This has principals one per-line of the form
96 .Dl iprop/ Ns Ar slave Ns @ Ns Ar REALM
99 is the hostname of the slave server in the given
102 .Dl iprop/kerberos-1.example.com@EXAMPLE.COM
103 On a slave, the argument
105 specifies the hostname of the master server from which to receive updates.
109 which sends the whole database to the slaves regularly,
111 normally sends only the changes as they happen on the master.
112 The master keeps track of all the changes by assigning a version
113 number to every change to the database.
114 The slaves know which was the latest version they saw, and in this
115 way it can be determined if they are in sync or not.
116 A log of all the changes is kept on the master.
117 When a slave is at an older version than the oldest one in the log,
118 the whole database has to be sent.
120 The changes are propagated over a secure channel (on port 2121 by
122 This should normally be defined as
126 or another source of the services database.
127 The master and slaves
128 must each have access to a keytab with keys for the
130 service principal on the local host.
132 There is a keep-alive feature logged in the master's
135 .Pa /var/heimdal/slave-stats ) .
137 Supported options for
140 .It Fl c Ar string , Fl Fl config-file= Ns Ar string
141 .It Fl r Ar string , Fl Fl realm= Ns Ar string
142 .It Fl k Ar kspec , Fl Fl keytab= Ns Ar kspec
143 keytab to get authentication from
144 .It Fl d Ar file , Fl Fl database= Ns Ar file
145 Database (default per KDC)
146 .It Fl Fl slave-stats-file= Ns Ar file
147 file for slave status information
148 .It Fl Fl time-missing= Ns Ar time
149 time before slave is polled for presence (default 2 min)
150 .It Fl Fl time-gone= Ns Ar time
151 time of inactivity after which a slave is considered gone (default 5 min)
158 Supported options for
161 .It Fl c Ar string , Fl Fl config-file= Ns Ar string
162 .It Fl r Ar string , Fl Fl realm= Ns Ar string
163 .It Fl k Ar kspec , Fl Fl keytab= Ns Ar kspec
164 keytab to get authentication from
165 .It Fl Fl time-lost= Ns Ar time
166 time before server is considered lost (default 5 min)
172 Time arguments for the relevant options above may be specified in forms
173 like 5 min, 300 s, or simply a number of seconds.
177 in the database directory.