[Freeipa-users] Promote CA-less replica

Fri Oct 21 05:14:53 UTC 2016

Hi,Thanks again.
Lastly, we've switched away from Ubuntu's FreeIPA due to a bad Samba compilation choice stopping AD trusts from working (samba isn't using MIT kerberos????).  We're now using CentOS 7.2. 

While we know the CentOS version will operate correctly, we only get to use 4.2 of FreeIPA, but the Ubuntu version is 4.4.2. Is there 4.4.2 for CentOS?
Best regardsJames Harrison       From: Rob Crittenden <rcritten at redhat.com>
 To: James Harrison <jamesaharrisonuk at yahoo.co.uk>; Martin Babinsky <mbabinsk at redhat.com>; "freeipa-users at redhat.com" <freeipa-users at redhat.com> 
 Sent: Wednesday, 19 October 2016, 14:28
 Subject: Re: [Freeipa-users] Promote CA-less replica

James Harrison wrote:
> Hi,
> Martin thanks for your quick response. Based on your comments. I have
> further questions.
>
>  >> equal peers and can be considered masters
>
> 1. If there any urgency for us to recreate a "master" server to perform
> any "master" type functions? How do we re-attach "replicas" to this new
> "master"?

Like he said, all IPA servers are equal (some are just more equal than 
others). If you truly have a CA-less system the the only thing that 
distinguishes one master from another is the presence of the DNS 
service. From below it looks like you install DNS on all which makes 
them all masters.

You can manage the replication topology using ipa-replica-manage.

>
>  >> As long as the others have valid CA and server certs
> 2. This is the install script we are using on the "replicas"
>
> ipa-replica-install \
>      --setup-dns --ssh-trust-dns --no-dnssec-validation \
>      -p xxxxxxxxx \
>      --admin-password=xxxxxxx \
>      --ip-address=replica_ip  \
>      --no-forwarders \
>      -U --mkhomedir --log-file=freeipa_log_file $1
>
> 3. The $1 is the cert generated from the "master".  If theres no
> distinction between a "master" and a "replica" in a CA-less environment,
> can a "replica" run the ipa-replica-prepare script once
> ipa-replica-install has been successfully run?

I think you mean $1 is the replica file generated from some master. 
Seeing how you generate that would tell us whether you are truly in a 
CA-less environment or not (e.g. you'd need to pass in PKCS#12 files to 
ipa-replica-prepare).

To answer your question, yes. In a CA-less environment any master can 
generate a prepare file.

You can add/remove connections using ipa-replica-manage. The initial 
connection is between the master that generated the prepare file and the 
host it was installed on.

rob

>
> Thank you for any help.
> Best regards,
> James Harrison
>
> ------------------------------------------------------------------------
> *From:* Martin Babinsky <mbabinsk at redhat.com>
> *To:* freeipa-users at redhat.com
> *Sent:* Wednesday, 19 October 2016, 11:01
> *Subject:* Re: [Freeipa-users] Promote CA-less replica
>
> On 10/19/2016 11:35 AM, James Harrison wrote:
>
> Hi James,
>
>  > Hi,
>  > Were using FreeIPA on Ubuntu Xenial. We lost the Master server.
>  >
>  > I have some questions:
>  > 1. Do DNS replicate among other replicas is we change/add DNS records?
>  > If not can this behaviour be changed?
> IPA-intergrated DNS stores records in the replicated LDAP subtree so any
> added/removed DNS record will replicate to other IPA DNS servers.
>
>  > 2. How do we promote a replica to become a master? We have not
>  > configured our servers to become a CA. Our CA is Comodo and we have
>  > configured FreeIPA to use a certificate, key and interim certificates
>  > from Comodo. using the options:
>  >
>  > --http_pkcs12=....
>  > --http_pin=....
>  > --dirsrv_pkcs12=...
>  > --dirsrv_pin=....
>  >
>  > Hope someone can help. Quite urgent.
>  >
> The terms FreeIPA master/replica are quite arbitrary as all replicas are
> equal peers and can be considered masters. The only notion of 'master'
> is when you use a Dogtag CA (then one of the CA replicas is designated a
> renewal master and does renew certificates in the topology and one is
> CRL master generating certificate revocation lists) and/or DNSSec (then
> one of DNS replica is designated a key master generating zone signing
> keys and other DNS replicas pull these keys).
>
> As you are using CA-less replicas then there should be no loss in the
> fact that the one designated 'master' is down (unless it was e.g. the
> only DNS server). As long as the others have valid CA and server certs
> they should be working just fine.
>
>
>
> You can just install a new replica in place of the master by generating
> replica file on another replicaa nd supplying the required certificates
> through options.
>
>
>  > Regards,
>  > James Harrison
>
>  >
>  >
>
>
> --
> Martin^3 Babinsky
>
> --
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> https://www.redhat.com/mailman/listinfo/freeipa-users
> Go to http://freeipa.org <http://freeipa.org/>for more info on the project
>
>
>
>
>

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