Deployment guide for OpenStack with PackStack

This guide is for deploying OpenStack with PackStack. It also then configures OpenLdap authentication with Kerberos.

Setup Host Centos Stream 9 or Rocky Linux 9

Ideally the VM or Host should have 8 vCPUs and 16GB Memory. Issue below to install required packages and perform preconfiguration tasks.

./setup_host.sh

Generate and Setup SSL Certificates (Optional)

export HOST_NAME="cloud.swstack.com"
dnf -y install socat
wget -O -  https://get.acme.sh | sh -s [email protected]
# Make sure 443/80 ports are open
~/.acme.sh/acme.sh --issue  -d ${HOST_NAME}  --standalone
cp /root/.acme.sh/${HOST_NAME}_ecc/cloud.swstack.com.key /etc/ssl/certs
cp /root/.acme.sh/${HOST_NAME}_ecc/cloud.swstack.com.cer /etc/ssl/certs
cp /root/.acme.sh/${HOST_NAME}_ecc/ca.cer /etc/ssl/certs

Setup answer file for PackStack

packstack --gen-answer-file=answers.txt

# Modify answer file to suit our needs
DEFAULT_PASS=`cat /dev/urandom | tr -dc '[:alnum:]' | head -c 20`
ADMIN_PASS="admin_osdev2023"
DEMO_PASS="demo_osdev2023"
sed -i 's/^CONFIG_DEFAULT_PASSWORD\=.*/CONFIG_DEFAULT_PASSWORD\='${DEFAULT_PASS}'/' answers.txt
sed -i 's/^CONFIG_MAGNUM_INSTALL\=.*/CONFIG_MAGNUM_INSTALL\=y/' answers.txt
sed -i 's/^CONFIG_KEYSTONE_ADMIN_PW\=.*/CONFIG_KEYSTONE_ADMIN_PW\='${ADMIN_PASS}'/' answers.txt
sed -i 's/^CONFIG_KEYSTONE_DEMO_PW\=.*/CONFIG_KEYSTONE_DEMO_PW\='${DEMO_PASS}'/' answers.txt
sed -i 's/^CONFIG_HORIZON_SSL\=.*/CONFIG_HORIZON_SSL\=y/' answers.txt
sed -i 's/^CONFIG_KEYSTONE_ADMIN_EMAIL\=.*/CONFIG_KEYSTONE_ADMIN_EMAIL\[email protected]/' answers.txt
sed -i 's/^CONFIG_HORIZON_SSL_CERT\=.*/CONFIG_HORIZON_SSL_CERT\=\/etc\/ssl\/certs\/cloud\.swstack\.com\.cer/' answers.txt
sed -i 's/^CONFIG_HORIZON_SSL_KEY\=.*/CONFIG_HORIZON_SSL_KEY\=\/etc\/ssl\/certs\/cloud\.swstack\.com\.key/' answers.txt
sed -i 's/^CONFIG_HORIZON_SSL_CACERT\=.*/CONFIG_HORIZON_SSL_CACERT\=\/etc\/ssl\/certs\/ca\.cer/' answers.txt
# Verify
grep -a 'CONFIG_MAGNUM_INSTALL\|CONFIG_DEFAULT_PASSWORD\|CONFIG_KEYSTONE_ADMIN_PW\|CONFIG_KEYSTONE_DEMO_PW\|CONFIG_HORIZON_SSL\|CONFIG_KEYSTONE_ADMIN_EMAIL\|CONFIG_HORIZON_SSL_CERT\|CONFIG_HORIZON_SSL_KEY\|CONFIG_HORIZON_SSL_CACERT' answers.txt

Install OpenStack

packstack --answer-file answers.txt

Configure authenticated email relay [TODO]

sed -i <following params> /etc/openstack-dashboard/local_settings
# Configure these for your outgoing email host
#EMAIL_HOST = 'smtp.my-company.com'
#EMAIL_PORT = 25
#EMAIL_HOST_USER = 'djangomail'
#EMAIL_HOST_PASSWORD = 'top-secret!'

Option 01: Integrate OpenStack with LDAP via a Domain

Setup Kerberos on host

sed -i '/\[realms\]/d' /etc/krb5.conf
sed -i '/\[domain_realm\]/d' /etc/krb5.conf
cat << EOF >> /etc/krb5.conf
[realms]
   SWSTACK.COM = {
      kdc = kdc.swstack.com
      admin_server = kdc.swstack.com
     }
[domain_realm]
  .swstack.com = SWSTACK.COM
EOF

## Test
kinit [email protected]

Install Python Packages for Kerberos

pip install keystoneauth1[kerberos]

Create a Domain file

mkdir -p /etc/keystone/domains
touch /etc/keystone/domains/keystone.mycloud.conf

cat << EOF >> /etc/keystone/domains/keystone.mycloud.conf
[identity]
driver = ldap

[ldap]
url=ldap://ldap.swstack.com
suffix=dc=swstack,dc=com
user_tree_dn=ou=kcloud,dc=swstack,dc=com
user_objectclass=organizationalPerson
user_id_attribute=uid
user_name_attribute=uid
#user_mail_attribute=mail
#user_enabled_attribute=nsAccountLock
#user_enabled_default=False
#user_enabled_invert=true
systemctl restart httpd
EOF

Make Changes in /etc/keystone/keystone.conf

[auth]
methods = external,password,token,kerberos,oauth1,mapped,application_credential
[federation]
federated_domain_name = mycloud
[identity]
domain_specific_drivers_enabled = true
domain_config_dir = /etc/keystone/domains

Update httpd configurations to integrate kerberos authentication in KeyStone

Add or update following section in /etc/httpd/conf.d/10-keystone_wsgi.conf

  ## WSGI configuration
  WSGIApplicationGroup %{GLOBAL}
  WSGIDaemonProcess keystone display-name=keystone group=keystone processes=4 threads=1 user=keystone
  WSGIProcessGroup keystone
  WSGIScriptAlias /krb "/var/www/cgi-bin/keystone/keystone"
  WSGIScriptAlias / "/var/www/cgi-bin/keystone/keystone"
  WSGIPassAuthorization On
  <Location "/krb/v3/auth/tokens">
        LogLevel debug
        AuthType GSSAPI
        AuthName "GSSAPI Login"
        GssapiAllowedMech krb5
        GssapiLocalName On
        Require valid-user
        SetEnv REMOTE_DOMAIN mycloud
  </Location>
</VirtualHost>

Update httpd configurations to integrate kerberos authentication in Horizon [TODO]

Still no success, but here is the idea

??

Create Keytab for kerberos authentication.

This step will be done on kdc server

root@kdc:~# kadmin.local
addprinc -randkey http/cloud.swstack.com
ktadd -k /etc/http.keytab http/cloud.swstack.com
addprinc -randkey host/cloud.swstack.com
ktadd -k /etc/http.keytab host/cloud.swstack.com

scp /etc/http.keytab [email protected]:/etc/gssproxy

Setup GSSAPI Proxy

Add/Update follwing in /etc/gssproxy/gssproxy.conf

[gssproxy]

[service/HTTP]
  mechs = krb5
  cred_store = keytab:/etc/gssproxy/http.keytab
  cred_store = ccache:/var/lib/gssproxy/clients/krb5cc_%U
  euid = 48
  krb5_principal = HTTP

systemctl enable --now gssproxy.service

Enable Multi Domain Support in OpenStack Keystone

sed -i 's/^OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT \=.*/OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT \=y/' /etc/openstack-dashboard/local_settings
#Set default domain with [TODO]
OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = 'Default'

Create OpenStack Domain, Projects

openstack domain create mycloud
openstack project create --description 'Project 01' proj01 --domain mycloud
openstack role add --user-domain mycloud --project proj01 --user clouduser1 admin

Basic Tests

Verify if you can list users from LDAP

openstack user list --domain mycloud

Create RC file for LDAP user (clouduser1)

[root@cloud ~]# cat mycloud_clouduser1 
export OS_REGION_NAME=RegionOne
export OS_USERNAME=clouduser1
export OS_AUTH_URL=http://cloud.swstack.com:5000/krb/v3
export PS1='[\u@\h \W(kCLOUD_admin)]\$ '
export OS_PROJECT_NAME=proj01
export OS_PROJECT_DOMAIN_NAME=mycloud
export OS_IDENTITY_API_VERSION=3
export OS_AUTH_TYPE=v3kerberos

Source file

source mycloud_clouduser1 

Obtain Kerberos Ticket

kinit [email protected]

Issue OpenStack CLI cmds

openstack user list
openstack endpoint list

Option 02: SSO Authentication (Federated Identity)