ipa-replica-install - Man Page

Create an IPA replica


ipa-replica-install [OPTION]...


Configures a new IPA server that is a replica of the server. Once it has been created it is an exact copy of the original IPA server and is an equal master. Changes made to any master are automatically replicated to other masters.

Domain level 0 is not supported anymore.

To create a replica, the machine only needs to be enrolled in the IPA domain first. This process of turning the IPA client into a replica is also referred to as replica promotion.

If you're starting with an existing IPA client, simply run ipa-replica-install to have it promoted into a replica. The NTP configuration cannot be updated during client promotion.

To promote a blank machine into a replica, you have two options, you can either run ipa-client-install in a separate step, or pass the enrollment related options to the ipa-replica-install (see Client Enrollment Options). In the latter case, ipa-replica-install will join the machine to the IPA realm automatically and will proceed with the promotion step.

If the installation fails you may need to run ipa-server-install --uninstall and ipa-client-install before running ipa-replica-install again.

The installation will fail if the host you are installing the replica on exists as a host in IPA or an existing replication agreement exists (for example, from a previously failed installation).

A replica should only be installed on the same or higher version of IPA on the remote system.



-P,  --principal

The user principal which will be used to promote the client to the replica and enroll the client itself, if necessary.

-w,  --admin-password

The Kerberos password for the given principal.

Client Enrollment Options

To install client and promote it to replica using a host keytab or One Time Password, the host needs to be a member of ipaservers group. This requires to create a host entry and add it to the host group prior replica installation.

--server, --domain, --realm  options are autodiscovered via DNS records by default. See manual page ipa-client-install(1) for further details about these options.

-p PASSWORD, --password=PASSWORD

One Time Password for joining a machine to the IPA realm.

-k,  --keytab

Path to host keytab.


The fully qualified domain name of the IPA server to enroll to. The IPA server must provide the CA role if --setup-ca option is specified, and the KRA role if --setup-kra option is specified.

-n,  --domain=DOMAIN

The primary DNS domain of an existing IPA deployment, e.g. example.com. This DNS domain should contain the SRV records generated by the IPA server installer.

-r,  --realm=REALM_NAME

The Kerberos realm of an existing IPA deployment.


The hostname of this machine (FQDN). If specified, the hostname will be set and the system configuration will be updated to persist over reboot.


Join the host even if it is already enrolled.

Basic Options


The IP address of this server. If this address does not match the address the host resolves to and --setup-dns is not selected the installation will fail. If the server hostname is not resolvable, a record for the hostname and IP_ADDRESS is added to /etc/hosts. This option can be used multiple times to specify more IP addresses of the server (e.g. multihomed and/or dualstacked server).


Create home directories for users on their first login


Configure chronyd to use this NTP server. This option can be used multiple times and it is used to specify exactly one time server.


Configure chronyd to use this NTP server pool. This option is meant to be pool of multiple servers resolved as one host name. This pool's servers may vary but pool address will be still same and chrony will choose only one server from this pool.

-N,  --no-ntp

Do not configure NTP client (chronyd).


Do not automatically redirect to the Web UI.


Configure OpenSSH client to trust DNS SSHFP records.


Do not configure OpenSSH client.


Do not configure OpenSSH server.


Configure SSSD as data source for subid.


Skip connection check to remote master


Skip checking for minimum required memory

-d,  --debug

Enable debug logging when more verbose output is needed

-U,  --unattended

An unattended installation that will never prompt for user input


The path to LDIF file that will be used to modify configuration of dse.ldif during installation of the directory server instance

Certificate System Options


Install and configure a CA on this replica. If a CA is not configured then certificate operations will be forwarded to a master with a CA installed.


Disables pkinit setup steps.


File containing the Directory Server SSL certificate and private key


File containing the Apache Server SSL certificate and private key


File containing the Kerberos KDC SSL certificate and private key


The password to unlock the Directory Server private key


The password to unlock the Apache Server private key


The password to unlock the Kerberos KDC private key


Name of the Directory Server SSL certificate to install


Name of the Apache Server SSL certificate to install


Name of the Kerberos KDC SSL certificate to install


File containing overrides for CA and KRA installation.


Skip check for updated CA DS schema on the remote master

Secret Management Options


Install and configure a KRA on this replica. If a KRA is not configured then vault operations will be forwarded to a master with a KRA installed.

DNS Options


Configure  an integrated DNS server, create a primary DNS zone (name specified by --domain or taken from an existing deployment), and fill it with service records necessary for IPA deployment. In cases where the IPA server name does not belong to the primary DNS domain and is not resolvable using DNS, create a DNS zone containing the IPA server name as well.

This option requires that you either specify at least one DNS forwarder through the --forwarder option or use the --no-forwarders option.

Note that you can set up a DNS at any time after the initial IPA server install by running ipa-dns-install (see ipa-dns-install(1)). IPA DNS cannot be uninstalled.


Add a DNS forwarder to the DNS configuration. You can use this option multiple times to specify more forwarders, but at least one must be provided, unless the --no-forwarders option is specified.


Do not add any DNS forwarders. Root DNS servers will be used instead.


Add DNS forwarders configured in /etc/resolv.conf to the list of forwarders used by IPA DNS.


DNS forwarding policy for global forwarders specified using other options. Defaults to first if no IP address belonging to a private or reserved ranges is detected on local interfaces (RFC 6303). Defaults to only if a private IP address is detected.


The reverse DNS zone to use. This option can be used multiple times to specify multiple reverse zones.


Do not create new reverse DNS zone. If a reverse DNS zone already exists for the subnet, it will be used.


Create necessary reverse zones


Create DNS zone even if it already exists


Do not use DNS for hostname lookup during installation


Do not automatically create DNS SSHFP records.


Disable DNSSEC validation on this server.

Sid Generation Options


The NetBIOS name for the IPA domain. If not provided then this is determined based on the leading component of the DNS domain name. Running ipa-adtrust-install for a second time with a different NetBIOS name will change the name. Please note that changing the NetBIOS name might break existing trust relationships to other domains.


Add SIDs to existing users and groups as on of final steps of the ipa-adtrust-install run. If there a many existing users and groups and a couple of replicas in the environment this operation might lead to a high replication traffic and a performance degradation of all IPA servers in the environment. To avoid this the SID generation can be run after ipa-adtrust-install is run and scheduled independently. To start this task you have to load an edited version of ipa-sidgen-task-run.ldif with the ldapmodify command info the directory server.


First RID value of the local domain. The first Posix ID of the local domain will be assigned to this RID, the second to RID+1 etc. See the online help of the idrange CLI for details.


Start value of the secondary RID range, which is only used in the case a user and a group share numerically the same Posix ID. See the online help of the idrange CLI for details.

Ad Trust Options


Configure AD Trust capability on a replica.


Add IPA masters to the list that allows to serve information about users from trusted forests. Starting with IPA 4.2, a regular IPA master can provide this information to SSSD clients. IPA masters aren't added to the list automatically as restart of the LDAP service on each of them is required. The host where ipa-adtrust-install is being run is added automatically.

Note that IPA masters where ipa-adtrust-install wasn't run, can serve information about users from trusted forests only if they are enabled via ipa-adtrust-install run on any other IPA master. At least SSSD version 1.13 on IPA master is required to be able to perform as a trust agent.


Enables support for trusted domains users for old clients through Schema Compatibility plugin. SSSD supports trusted domains natively starting with version 1.9. For platforms that lack SSSD or run older SSSD version one needs to use this option. When enabled, slapi-nis package needs to be installed and schema-compat-plugin will be configured to provide lookup of users and groups from trusted domains via SSSD on IPA server. These users and groups will be available under cn=users,cn=compat,$SUFFIX and cn=groups,cn=compat,$SUFFIX trees. SSSD will normalize names of users and groups to lower case.

In addition to providing these users and groups through the compat tree, this option enables authentication over LDAP for trusted domain users with DN under compat tree, i.e. using bind DN uid=administrator@ad.domain,cn=users,cn=compat,$SUFFIX.

LDAP authentication performed by the compat tree is done via PAM 'system-auth' service. This service exists by default on Linux systems and is provided by pam package as /etc/pam.d/system-auth. If your IPA install does not have default HBAC rule 'allow_all' enabled, then make sure to define in IPA special service called 'system-auth' and create an HBAC rule to allow access to anyone to this rule on IPA masters.

As 'system-auth' PAM service is not used directly by any other application, it is safe to use it for trusted domain users via compatibility path.

Exit Status

0 if the command was successful

1 if an error occurred

3 if the host exists in the IPA server or a replication agreement to the remote master already exists

4 if the remote master specified for enrollment does not provide required services such as CA or KRA

Referenced By

ipa(1), ipa-replica-conncheck(1).

Dec 19 2016 IPA Manual Pages