chore: add kerberos config file

Signed-off-by: Yftach Herzog <[email protected]>

Dockerfile

@@ -19,6 +19,7 @@ ADD --chown=root:root --chmod=644 data/ca-trust/* /etc/pki/ca-trust/source/ancho
 RUN /usr/bin/fix-permissions /tmp/src \
     && /usr/bin/update-ca-trust
 RUN yum install -y krb5-workstation
+COPY data/kerberos/krb5.conf /etc
 USER 1001
 
 RUN \

data/kerberos/krb5.conf

@@ -0,0 +1,35 @@
+# https://gitlab.corp.redhat.com/it-iam/system-configs/-/raw/master/krb5/idm/linux-krb5.conf
+includedir /etc/krb5.conf.d/
+
+# depending on your config, you may wish to uncomment the following:
+# includedir /var/lib/sss/pubconf/krb5.include.d/
+
+[libdefaults]
+default_realm = IPA.REDHAT.COM
+dns_lookup_realm = true
+dns_lookup_kdc = true
+rdns = false
+dns_canonicalize_hostname = false
+ticket_lifetime = 24h
+forwardable = true
+udp_preference_limit = 0
+default_ccache_name = KEYRING:persistent:%{uid}
+
+[realms]
+REDHAT.COM = {
+  default_domain = redhat.com
+  dns_lookup_kdc = true
+  master_kdc = kerberos.corp.redhat.com
+  admin_server = kerberos.corp.redhat.com
+}
+
+IPA.REDHAT.COM = {
+  default_domain = ipa.redhat.com
+  dns_lookup_kdc = true
+  # Trust tickets issued by legacy realm on this host
+  auth_to_local = RULE:[1:$1@$0](.*@REDHAT\.COM)s/@.*//
+  auth_to_local = DEFAULT
+}
+
+#DO NOT ADD A [domain_realms] section
+#https://mojo.redhat.com/docs/DOC-1166841