Using OpenAFS in an OpenBSD environment
Some knob twiddling you may find useful:
1. Increase the default maximum number of open files in /etc/login.conf
for daemon to at least a few thousand.
:openfiles-cur=infinity:\
2. If you increase #2 above 1772 then consider also updating
kern.maxfiles in /etc/sysctl.conf:
kern.maxfiles=102400 # increase maximum files
3. Setting up kerberos authentication for users is accomplished by modifying
/etc/login.conf's auth-defaults line:
auth-defaults:auth=krb5-or-pwd,passwd,skey:
Please note if you have a local password and wish to login using that
instead of kerberos, you'll need to use 'username:passwd' to login.
To setup OpenAFS, you must first have a KerberosV realm setup. Below
are brief instructions to do so. See 'info heimdal' for further details.
Once the KerberosV realm is setup, run '%LOCALBASE%/sbin/openafs-setup'
and follow the instructions there to setup OpenAFS.
Quick Start Guide to KerberosV as needed by OpenAFS
---------------------------------------------------
For KerberosV setup, it is highly recommended to have some entries
in the DNS domain that you will use that is the lowercase equivalent
of your KerberosV realm name. If, for example, you had the domain
'example.com' you would have a realm of 'EXAMPLE.COM' and add the
following to the 'example.com' zone file:
_kerberos._udp SRV 0 0 88 kdc0
_kerberos._tcp SRV 0 0 88 kdc0
_kpasswd._udp SRV 0 0 464 kdc0
_kerberos-adm._tcp SRV 0 0 749 kdc0
_kerberos TXT "EXAMPLE.COM"
Setting a default krb5.conf is useful on all AFS clients and servers.
cd /etc/kerberosV
REALM=EXAMPLE.COM
cell=example.com
host=kdc0
sed 's/%host%/'$host'/g;s/%cell%/'$cell'/g;s/%REALM%/'$REALM'/g' \
< %LOCALBASE%/share/examples/openafs/krb5.conf > krb5.conf
Create the heimdal directory:
mkdir -p 700 /var/heimdal
Initialize the basic key:
kstash --random-key
Initialize the Kerberos realm:
kadmin -l
kadmin> init EXAMPLE.COM
Max ticket life [1 day]:unlimited
Max renewable life [1 week]:unlimited
Principal expiration time [never]:
Password expiration time [never]:
Attributes []:
todd@EXAMPLE.COM's Password:
Verifying - todd@EXAMPLE.COM's Password:
kadmin> add todd/admin
Max ticket life [1 day]:
Max renewable life [1 week]:
Principal expiration time [never]:
Password expiration time [never]:
Attributes []:
todd/admin@EXAMPLE.COM's Password:
Verifying - todd/admin@EXAMPLE.COM's Password:
.. do this last part per KerberosV client and server:
kadmin> add --random-key host/kdc0.example.com
Max ticket life [1 day]:unlimited
Max renewable life [1 week]:unlimited
Principal expiration time [never]:
Password expiration time [never]:
Attributes []:
kadmin> ext host/kdc0.example.com
kadmin> quit
On the server run:
/usr/libexec/kdc &
Verify authentication works:
kinit todd
todd@EXAMPLE.COM's Password:
klist
Credentials cache: FILE:/tmp/krb5cc_1000
Principal: todd@EXAMPLE.COM
Issued Expires Principal
Jul 20 22:10:41 Aug 30 22:10:41 krbtgt/EXAMPLE.COM@EXAMPLE.COM
Permit network based kerberos administration:
/usr/libexec/kadmind &
Setup the acl file:
Put the following into /var/heimdal/kadmind.acl:
todd/admin@EXAMPLE.COM all
Make sure things startup properly upon reboot:
Put the following into /etc/rc.conf.local:
krb5_master_kdc=YES
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