David Copperfield wrote:
Hi Deon and all,
>> Hi follks,
>>
>> I'm completely lost at reading the IPA document on how to promote a
IPA replica into master IPA. When I'm try to follow the steps listed in
the chapter '16.8.1 Promoting a Replica with a Dogtag Certificate System
CA' at the link
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Identity_Management_Guide/promoting-replica.html#promoting-pki,
the last steps 'g' said:
>>
>> g. Disable the redirect settings for CRL generation requests:
>> master.ca.agent.host=hostname
>> master.ca.agent.port=port number
>>
>> The above instructions don't give any hints of 'hostname', or 'port
number'. users don't have any clues about them, should them be this
replica's name, or the original master's name? and what is the por
>> t number? it is a TCP port, or a UDP port?
>
>The replica is configured to check for information from the master CA
-- in this case, asking the master CA to generate a CRL. Those
parameters tell the replica where to look. Part of promoting the replica
is telling it *not* to look for a master CA. So, those parameters should
be blanked or removed.
>
>I can definitely make that more clear.
Sure, please elabroate -- I'll still half undertstand only :) This part
is pretty confusing by itself.
First, when a IPA replica is first installed, the dogtag certification
system is not installed at all, so the directory /var/lib/pki-ca/conf
doesn't exist on IPA slave at all. The directory shows after
only after 'ipa-ca-install' command is run on the replica.
After running the command 'ipa-ca-install', in the configuration file
'/var/lib/pki-ca/conf/CS.conf', there are no 'ca.crl.*' statements on
IPA replica at all; there are no master.ca.agent.{host/port} s
tatement either.
What we really need to clarify here, from users' respective, are
elaborated below(may not be completed):
1, how to promote a IPA replica into a IPA master?
All replicas are equal with the exception that:
* some may have a CA and others may not
* some may have a DNS server and others may not
The only distinction that the initial CA installation has is that it is
the one that generates the CRL.
2, What's the effect on other sibling IPA replicas? -- do we need to
break original replication agreement with old IPA master? and create new
aggrement with new server? If so, how to do it?
No, nothing changes, this is all MMR.
3, How to check/verify that new IPA replica is really promoted into new
IPA master?
You would verify that the CRL is being generated on the master you
choose (/var/log/pki-ca/debug).
4, how to check/verify that old IPA Master is stopped its orignal master
function? disowning the master CA in the PKI hierarchy as claimed?
Verify that it is no longer generating a CRL (/var/log/pki-ca/debug)
4, what's the operations on the original IPA master?
4.1 case #1, what is the 'official' steps to remove/decommission
original IPA master? -- what's the steps besides final
'ipa-master-install --uninstall'?
If you are decommissioning an instance then you'll want to break all
replication agreements it has.
4.2 case #2, if the original IPA server is broken completely and all IPA
replica could not reach it? -- Then what's are the steps to promote a
IPA replica? Do we need the orignal /root/cacert.p12?
No, use the documented steps. The only thing to do is to generate the
CRL on a different host.
4.3 case #2, if the original IPA server is only temporarily unreachable?
-- then after an IPA replica is promoted into new IPA master, how to
depromote the orignal IPA master to replica after it is up?
You would just reverse the CRL generation. Note that if the server is
down for longer than the changelog then you'll want to re-initialize bot
the the CA and IPA LDAP databases from one of the other masters.
rob
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