227 lines
7.4 KiB
ReStructuredText
227 lines
7.4 KiB
ReStructuredText
.. _advanced-configuration:
|
|
|
|
======================
|
|
Advanced Configuration
|
|
======================
|
|
|
|
Endpoint Network Configuration
|
|
==============================
|
|
|
|
When an OpenStack cloud is deployed, each services' REST API is presented
|
|
as a series of endpoints. These endpoints are the admin URL, the internal
|
|
URL, and the external URL.
|
|
|
|
Kolla offers two options for assigning these endpoints to network addresses.
|
|
These are combined and separate. For the combined option, all three
|
|
endpoints share the same IP address. For the separate option, the external
|
|
URL is assigned to an IP address that is different than the IP address
|
|
shared by the internal and admin URLs.
|
|
|
|
The configuration parameters related to these options are:
|
|
- kolla_internal_vip_address
|
|
- network_interface
|
|
- kolla_external_vip_address
|
|
- kolla_external_vip_interface
|
|
|
|
For the combined option, set the two variables below, while allowing the
|
|
other two to accept their default values. In this configuration all REST
|
|
API requests, internal and external, will flow over the same network. ::
|
|
|
|
kolla_internal_vip_address: "10.10.10.254"
|
|
network_interface: "eth0"
|
|
|
|
For the separate option, set these four variables. In this configuration
|
|
the internal and external REST API requests can flow over separate
|
|
networks. ::
|
|
|
|
kolla_internal_vip_address: "10.10.10.254"
|
|
network_interface: "eth0"
|
|
kolla_external_vip_address: "10.10.20.254"
|
|
kolla_external_vip_interface: "eth1"
|
|
|
|
Fully Qualified Domain Name Configuration
|
|
=========================================
|
|
|
|
When addressing a server on the internet, it is more common to use
|
|
a name, like www.example.net, instead of an address like 10.10.10.254.
|
|
If you prefer to use names to address the endpoints in your kolla
|
|
deployment use the variables:
|
|
|
|
- kolla_internal_fqdn
|
|
- kolla_external_fqdn
|
|
|
|
::
|
|
|
|
kolla_internal_fqdn: inside.mykolla.example.net
|
|
kolla_external_fqdn: mykolla.example.net
|
|
|
|
Provisions must be taken outside of kolla for these names to map to the
|
|
configured IP addresses. Using a DNS server or the /etc/hosts file are
|
|
two ways to create this mapping.
|
|
|
|
TLS Configuration
|
|
=================
|
|
|
|
An additional endpoint configuration option is to enable or disable
|
|
TLS protection for the external VIP. TLS allows a client to authenticate
|
|
the OpenStack service endpoint and allows for encryption of the requests
|
|
and responses.
|
|
|
|
.. note:: The kolla_internal_vip_address and kolla_external_vip_address must
|
|
be different to enable TLS on the external network.
|
|
|
|
The configuration variables that control TLS networking are:
|
|
|
|
- kolla_enable_tls_external
|
|
- kolla_external_fqdn_cert
|
|
|
|
The default for TLS is disabled; to enable TLS networking:
|
|
|
|
::
|
|
|
|
kolla_enable_tls_external: "yes"
|
|
kolla_external_fqdn_cert: "{{ node_config_directory }}/certificates/mycert.pem"
|
|
|
|
|
|
.. note:: TLS authentication is based on certificates that have been
|
|
signed by trusted Certificate Authorities. Examples of commercial
|
|
CAs are Comodo, Symantec, GoDaddy, and GlobalSign. Letsencrypt.org
|
|
is a CA that will provide trusted certificates at no charge. Many
|
|
company's IT departments will provide certificates within that
|
|
company's domain. If using a trusted CA is not possible for your
|
|
situation, you can use OpenSSL to create your own or see the section
|
|
below about kolla generated self-signed certificates.
|
|
|
|
Two certificate files are required to use TLS securely with authentication.
|
|
These two files will be provided by your Certificate Authority. These
|
|
two files are the server certificate with private key and the CA certificate
|
|
with any intermediate certificates. The server certificate needs to be
|
|
installed with the kolla deployment and is configured with the
|
|
``kolla_external_fqdn_cert`` parameter. If the server certificate provided
|
|
is not already trusted by the client, then the CA certificate file will
|
|
need to be distributed to the client.
|
|
|
|
When using TLS to connect to a public endpoint, an OpenStack client will
|
|
have settings similar to this:
|
|
|
|
::
|
|
|
|
export OS_PROJECT_DOMAIN_ID=default
|
|
export OS_USER_DOMAIN_ID=default
|
|
export OS_PROJECT_NAME=demo
|
|
export OS_USERNAME=demo
|
|
export OS_PASSWORD=demo-password
|
|
export OS_AUTH_URL=https://mykolla.example.net:5000
|
|
# os_cacert is optional for trusted certificates
|
|
export OS_CACERT=/etc/pki/mykolla-cacert.crt
|
|
export OS_IDENTITY_API_VERSION=3
|
|
|
|
Self-Signed Certificates
|
|
========================
|
|
|
|
.. note:: Self-signed certificates should never be used in production.
|
|
|
|
It is not always practical to get a certificate signed by a well-known
|
|
trust CA, for example a development or internal test kolla deployment. In
|
|
these cases it can be useful to have a self-signed certificate to use.
|
|
|
|
For convenience, the kolla-ansible command will generate the necessary
|
|
certificate files based on the information in the ``globals.yml``
|
|
configuration file:
|
|
|
|
::
|
|
|
|
kolla-ansible certificates
|
|
|
|
The files haproxy.pem and haproxy-ca.pem will be generated and stored
|
|
in the ``/etc/kolla/certificates/`` directory.
|
|
|
|
Deployment Configuration
|
|
========================
|
|
|
|
TODO(all) fill this section out
|
|
|
|
OpenStack Service Configuration in Kolla
|
|
========================================
|
|
|
|
.. note:: As of now kolla only supports config overrides for ini based configs.
|
|
An operator can change the location where custom config files are read
|
|
from by editing ``/etc/kolla/globals.yml`` and adding the following
|
|
line.
|
|
|
|
::
|
|
|
|
# The directory to merge custom config files the kolla's config files
|
|
node_custom_config: "/etc/kolla/config"
|
|
|
|
Kolla allows the operator to override configuration of services. Kolla will
|
|
look for a file in ``/etc/kolla/config/<< service name >>/<< config file >>``.
|
|
This can be done per-project, per-service or per-service-on-specified-host.
|
|
For example to override scheduler_max_attempts in nova scheduler, the operator
|
|
needs to create ``/etc/kolla/config/nova/nova-scheduler.conf`` with content:
|
|
|
|
::
|
|
|
|
[DEFAULT]
|
|
scheduler_max_attempts = 100
|
|
|
|
If the operator wants to configure compute node ram allocation ratio
|
|
on host myhost, the operator needs to create file
|
|
``/etc/kolla/config/nova/myhost/nova.conf`` with content:
|
|
|
|
::
|
|
|
|
[DEFAULT]
|
|
ram_allocation_ratio = 5.0
|
|
|
|
The operator can make these changes after services were already deployed by
|
|
using following command:
|
|
|
|
::
|
|
|
|
kolla-ansible reconfigure
|
|
|
|
IP Address Constrained Environments
|
|
===================================
|
|
|
|
If a development environment doesn't have a free IP address available for VIP
|
|
configuration, the host's IP address may be used here by disabling HAProxy by
|
|
adding:
|
|
|
|
::
|
|
|
|
enable_haproxy: "no"
|
|
|
|
Note this method is not recommended and generally not tested by the
|
|
Kolla community, but included since sometimes a free IP is not available
|
|
in a testing environment.
|
|
|
|
External Elasticsearch/Kibana environment
|
|
=========================================
|
|
|
|
It is possible to use an external Elasticsearch/Kibana environment. To do this
|
|
first disable the deployment of the central logging.
|
|
|
|
::
|
|
|
|
enable_central_logging: "no"
|
|
|
|
Now you can use the parameter ``elasticsearch_address`` to configure the
|
|
address of the external Elasticsearch environment.
|
|
|
|
Non-default <service> port
|
|
==========================
|
|
|
|
It is sometimes required to use a different than default port
|
|
for service(s) in Kolla. It is possible with setting <service>_port
|
|
in ``globals.yml`` file.
|
|
For example:
|
|
|
|
::
|
|
|
|
database_port: 3307
|
|
|
|
As <service>_port value is saved in different services' configurationso
|
|
it's advised to make above change before deploying.
|
|
|