post_upgrade() {
    # Has the client been configured?
    restore=0
    test -f '/var/lib/ipa-client/sysrestore/sysrestore.index' && restore=$(wc -l '/var/lib/ipa-client/sysrestore/sysrestore.index' | awk '{print $1}')

    if [ -f '/etc/sssd/sssd.conf' -a $restore -ge 2 ]; then
        if ! grep -E -q '/var/lib/sss/pubconf/krb5.include.d/' /etc/krb5.conf  2>/dev/null ; then
            echo "includedir /var/lib/sss/pubconf/krb5.include.d/" > /etc/krb5.conf.ipanew
            cat /etc/krb5.conf >> /etc/krb5.conf.ipanew
            mv -Z /etc/krb5.conf.ipanew /etc/krb5.conf
        fi
    fi

    if [ $restore -ge 2 ]; then
        if grep -E -q '\s*pkinit_anchors = FILE:/etc/ipa/ca.crt$' /etc/krb5.conf 2>/dev/null; then
            sed -E 's|(\s*)pkinit_anchors = FILE:/etc/ipa/ca.crt$|\1pkinit_anchors = FILE:/var/lib/ipa-client/pki/kdc-ca-bundle.pem\n\1pkinit_pool = FILE:/var/lib/ipa-client/pki/ca-bundle.pem|' /etc/krb5.conf >/etc/krb5.conf.ipanew
            mv -Z /etc/krb5.conf.ipanew /etc/krb5.conf
            cp /etc/ipa/ca.crt /var/lib/ipa-client/pki/kdc-ca-bundle.pem
            cp /etc/ipa/ca.crt /var/lib/ipa-client/pki/ca-bundle.pem
        fi
    fi

    if [ -f '/etc/conf.d/ntpd.conf' -a $restore -ge 2 ]; then
        if grep -E -q 'OPTIONS=.*-u ntp:ntp' /etc/conf.d/ntpd.conf 2>/dev/null; then
            sed -r '/OPTIONS=/ { s/\s+-u ntp:ntp\s+/ /; s/\s*-u ntp:ntp\s*// }' /etc/conf.d/ntpd.conf >/etc/conf.d/ntpd.conf.ipanew
            mv -Z /etc/conf.d/ntpd.conf.ipanew /etc/conf.d/ntpd.conf

            /bin/systemctl condrestart ntpd.service 2>&1 || :
        fi
    fi

    if [ $restore -ge 2 ]; then
        python2 -c 'from ipaclient.install.client import update_ipa_nssdb; update_ipa_nssdb()' >/var/log/ipaupgrade.log 2>&1
    fi
}