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Ceph Produktionsbeispiel¶
In diesem Abschnitt wird eine Beispielproduktionsumgebung für eine funktionierende OpenStack-Ansible-Bereitstellung (OSA) mit Hochverfügbarkeitsdiensten und die Verwendung des Ceph-Back-Ends für Abbilder, Datenträger und Instanzen beschrieben.
Diese Beispielumgebung weist die folgenden Merkmale auf:
Drei Infrastruktur (Kontrollebene) Hosts mit Ceph-Mon-Containern
Zwei Rechnerhosts
Drei Ceph OSD-Speicher-Hosts
Ein Protokollaggregationshost
Mehrere Netzwerkschnittstellenkarten (Network Interface Cards, NIC), die als verbundene Paare für jeden Host konfiguriert sind
Komplettes Compute-Kit mit dem Telemetrie-Service (Ceilometer) im Lieferumfang enthalten, wobei Ceph als Speicher-Back-End für die Image (glance) und Block Storage (Cinder) -Dienste konfiguriert ist
Internetzugang über die Router-Adresse 172.29.236.1 im Management-Netzwerk
Integration mit Ceph¶
OpenStack-Ansible allows Ceph storage cluster integration in three ways:
connecting to your own pre-deployed ceph cluster by pointing to its information in
user_variables.yml
and allowing openstack-ansible to ssh to the ceph monitors to retrieve the contents of ceph.conf and the keyrings.This method only requires a very small amount of configuration in
user_variables.yml
to point to the external ceph cluster monitors. The whole configuration for ceph-ansible would live outside the openstack-ansible deployment and there is no duplication. Theceph_mons
variable expects a list of IP addresses for the Ceph Monitor servers in the external ceph deployment:
Bemerkung
Overriding ceph_mons is required only when you are using external
cluster which does not present in the OpenStack-Ansible’s inventory
(ie group mon_group_name
is not defined).
ceph_mons:
- 172.29.244.151
- 172.29.244.152
- 172.29.244.153
connecting to your own pre-deployed ceph cluster by pointing to its monitors in
user_variables.yml
as above and providing data to populate ceph.conf and ceph keyring files on the deploy host. This is described here. No ssh access by openstack-ansible is required to the ceph cluster.deploying a ceph cluster as part of the openstack-ansible deployment by using the roles maintained by the Ceph-Ansible project. Deployers can enable the
ceph-install.yml
playbook by adding hosts to theceph-mon_hosts
andceph-osd_hosts
groups inopenstack_user_config.yml
. In order to enableceph-rgw-install.yml
playbook you need to addceph-rgw_hosts
inopenstack_user_config.yml
.
Bemerkung
Please mention, that RGW installation should be performed after deployment of Keystone service.
Once groups are defined, you can proceed with configuring Ceph-Ansible specific vars
in the OpenStack-Ansible user_variables.yml
file.
Warnung
Deploying ceph cluster as part of openstack-ansible is not recommended since ceph-ansible upgrade path is not tested or supported. This option is mainly used for CI and AIO deployments to test and demonstrate a sample integration of the software stack.
Dieses Beispiel konzentriert sich auf die Bereitstellung von OpenStack-Ansible und seines Ceph-Clusters.
Netzwerkkonfiguration¶
Netzwerk CIDR / VLAN Zuweisungen¶
Die folgenden CIDR- und VLAN-Zuweisungen werden für diese Umgebung verwendet.
Netzwerk |
CIDR |
VLAN |
---|---|---|
Verwaltungsnetzwerk |
172.29.236.0/22 |
10 |
Tunnel (VXLAN) Netzwerk |
172.29.240.0/22 |
30 |
Speichernetzwerk |
172.29.244.0/22 |
20 |
IP-Zuweisungen¶
Die folgenden Hostnamen und IP-Adresszuweisungen werden für diese Umgebung verwendet.
Hostname |
Verwaltungs-IP |
Tunnel (VxLAN) IP |
Speicher-IP |
---|---|---|---|
lb_vip_adresse |
172.29.236.9 |
||
infra1 |
172.29.236.11 |
172.29.240.11 |
|
infra2 |
172.29.236.12 |
172.29.240.12 |
|
infra3 |
172.29.236.13 |
172.29.240.13 |
|
log1 |
172.29.236.14 |
||
compute1 |
172.29.236.16 |
172.29.240.16 |
172.29.244.16 |
compute2 |
172.29.236.17 |
172.29.240.17 |
172.29.244.17 |
osd1 |
172.29.236.18 |
172.29.244.18 |
|
osd2 |
172.29.236.19 |
172.29.244.19 |
|
osd3 |
172.29.236.20 |
172.29.244.20 |
Host-Netzwerkkonfiguration¶
Für jeden Host müssen die richtigen Netzwerkbrücken implementiert werden. Das Folgende ist die /etc/network/interfaces
Datei für `` infra1``.
Bemerkung
Wenn Ihre Umgebung nicht eth0
, sondern p1p1
oder einen anderen Namen hat, stellen Sie sicher, dass alle Verweise auf eth0
in allen Konfigurationsdateien durch den entsprechenden Namen ersetzt werden. Gleiches gilt für zusätzliche Netzwerkschnittstellen.
# This is a multi-NIC bonded configuration to implement the required bridges
# for OpenStack-Ansible. This illustrates the configuration of the first
# Infrastructure host and the IP addresses assigned should be adapted
# for implementation on the other hosts.
#
# After implementing this configuration, the host will need to be
# rebooted.
# Assuming that eth0/1 and eth2/3 are dual port NIC's we pair
# eth0 with eth2 and eth1 with eth3 for increased resiliency
# in the case of one interface card failing.
auto eth0
iface eth0 inet manual
bond-master bond0
bond-primary eth0
auto eth1
iface eth1 inet manual
bond-master bond1
bond-primary eth1
auto eth2
iface eth2 inet manual
bond-master bond0
auto eth3
iface eth3 inet manual
bond-master bond1
# Create a bonded interface. Note that the "bond-slaves" is set to none. This
# is because the bond-master has already been set in the raw interfaces for
# the new bond0.
auto bond0
iface bond0 inet manual
bond-slaves none
bond-mode active-backup
bond-miimon 100
bond-downdelay 200
bond-updelay 200
# This bond will carry VLAN and VXLAN traffic to ensure isolation from
# control plane traffic on bond0.
auto bond1
iface bond1 inet manual
bond-slaves none
bond-mode active-backup
bond-miimon 100
bond-downdelay 250
bond-updelay 250
# Container/Host management VLAN interface
auto bond0.10
iface bond0.10 inet manual
vlan-raw-device bond0
# OpenStack Networking VXLAN (tunnel/overlay) VLAN interface
auto bond1.30
iface bond1.30 inet manual
vlan-raw-device bond1
# Storage network VLAN interface (optional)
auto bond0.20
iface bond0.20 inet manual
vlan-raw-device bond0
# Container/Host management bridge
auto br-mgmt
iface br-mgmt inet static
bridge_stp off
bridge_waitport 0
bridge_fd 0
bridge_ports bond0.10
address 172.29.236.11
netmask 255.255.252.0
gateway 172.29.236.1
dns-nameservers 8.8.8.8 8.8.4.4
# OpenStack Networking VXLAN (tunnel/overlay) bridge
#
# The COMPUTE, NETWORK and INFRA nodes must have an IP address
# on this bridge.
#
auto br-vxlan
iface br-vxlan inet static
bridge_stp off
bridge_waitport 0
bridge_fd 0
bridge_ports bond1.30
address 172.29.240.16
netmask 255.255.252.0
# OpenStack Networking VLAN bridge
auto br-vlan
iface br-vlan inet manual
bridge_stp off
bridge_waitport 0
bridge_fd 0
bridge_ports bond1
# compute1 Network VLAN bridge
#auto br-vlan
#iface br-vlan inet manual
# bridge_stp off
# bridge_waitport 0
# bridge_fd 0
#
# For tenant vlan support, create a veth pair to be used when the neutron
# agent is not containerized on the compute hosts. 'eth12' is the value used on
# the host_bind_override parameter of the br-vlan network section of the
# openstack_user_config example file. The veth peer name must match the value
# specified on the host_bind_override parameter.
#
# When the neutron agent is containerized it will use the container_interface
# value of the br-vlan network, which is also the same 'eth12' value.
#
# Create veth pair, do not abort if already exists
# pre-up ip link add br-vlan-veth type veth peer name eth12 || true
# Set both ends UP
# pre-up ip link set br-vlan-veth up
# pre-up ip link set eth12 up
# Delete veth pair on DOWN
# post-down ip link del br-vlan-veth || true
# bridge_ports bond1 br-vlan-veth
# Storage bridge (optional)
#
# Only the COMPUTE and STORAGE nodes must have an IP address
# on this bridge. When used by infrastructure nodes, the
# IP addresses are assigned to containers which use this
# bridge.
#
auto br-storage
iface br-storage inet manual
bridge_stp off
bridge_waitport 0
bridge_fd 0
bridge_ports bond0.20
# compute1 Storage bridge
#auto br-storage
#iface br-storage inet static
# bridge_stp off
# bridge_waitport 0
# bridge_fd 0
# bridge_ports bond0.20
# address 172.29.244.16
# netmask 255.255.252.0
Bereitstellungskonfiguration¶
Umgebungslayout¶
Die Datei /etc/openstack_deploy/openstack_user_config.yml
definiert das Umgebungslayout.
Die folgende Konfiguration beschreibt das Layout für diese Umgebung.
---
cidr_networks: &cidr_networks
management: 172.29.236.0/22
tunnel: 172.29.240.0/22
storage: 172.29.244.0/22
used_ips:
- "172.29.236.1,172.29.236.50"
- "172.29.240.1,172.29.240.50"
- "172.29.244.1,172.29.244.50"
- "172.29.248.1,172.29.248.50"
global_overrides:
cidr_networks: *cidr_networks
internal_lb_vip_address: 172.29.236.9
#
# The below domain name must resolve to an IP address
# in the CIDR specified in haproxy_keepalived_external_vip_cidr.
# If using different protocols (https/http) for the public/internal
# endpoints the two addresses must be different.
#
external_lb_vip_address: openstack.example.com
management_bridge: "br-mgmt"
provider_networks:
- network:
container_bridge: "br-mgmt"
container_type: "veth"
container_interface: "eth1"
ip_from_q: "management"
type: "raw"
group_binds:
- all_containers
- hosts
is_management_address: true
- network:
container_bridge: "br-vxlan"
container_type: "veth"
container_interface: "eth10"
ip_from_q: "tunnel"
type: "vxlan"
range: "1:1000"
net_name: "vxlan"
group_binds:
- neutron_linuxbridge_agent
- network:
container_bridge: "br-vlan"
container_type: "veth"
container_interface: "eth12"
host_bind_override: "eth12"
type: "flat"
net_name: "physnet1"
group_binds:
- neutron_linuxbridge_agent
- network:
container_bridge: "br-vlan"
container_type: "veth"
container_interface: "eth11"
type: "vlan"
range: "101:200,301:400"
net_name: "physnet2"
group_binds:
- neutron_linuxbridge_agent
- network:
container_bridge: "br-storage"
container_type: "veth"
container_interface: "eth2"
ip_from_q: "storage"
type: "raw"
group_binds:
- glance_api
- cinder_api
- cinder_volume
- manila_share
- nova_compute
- ceph-mon
- ceph-osd
###
### Infrastructure
###
_infrastructure_hosts: &infrastructure_hosts
infra1:
ip: 172.29.236.11
infra2:
ip: 172.29.236.12
infra3:
ip: 172.29.236.13
# nova hypervisors
compute_hosts: &compute_hosts
compute1:
ip: 172.29.236.16
compute2:
ip: 172.29.236.17
ceph-osd_hosts:
osd1:
ip: 172.29.236.18
osd2:
ip: 172.29.236.19
osd3:
ip: 172.29.236.20
# galera, memcache, rabbitmq, utility
shared-infra_hosts: *infrastructure_hosts
# zookeeper
coordination_hosts: *infrastructure_hosts
# ceph-mon containers
ceph-mon_hosts: *infrastructure_hosts
# ceph-mds containers
ceph-mds_hosts: *infrastructure_hosts
# ganesha-nfs hosts
ceph-nfs_hosts: *infrastructure_hosts
# repository (apt cache, python packages, etc)
repo-infra_hosts: *infrastructure_hosts
# load balancer
# Ideally the load balancer should not use the Infrastructure hosts.
# Dedicated hardware is best for improved performance and security.
load_balancer_hosts: *infrastructure_hosts
###
### OpenStack
###
# keystone
identity_hosts: *infrastructure_hosts
# cinder api services
storage-infra_hosts: *infrastructure_hosts
# cinder volume hosts (Ceph RBD-backed)
storage_hosts: *infrastructure_hosts
# glance
image_hosts: *infrastructure_hosts
# placement
placement-infra_hosts: *infrastructure_hosts
# nova api, conductor, etc services
compute-infra_hosts: *infrastructure_hosts
# heat
orchestration_hosts: *infrastructure_hosts
# horizon
dashboard_hosts: *infrastructure_hosts
# neutron server, agents (L3, etc)
network_hosts: *infrastructure_hosts
# ceilometer (telemetry data collection)
metering-infra_hosts: *infrastructure_hosts
# aodh (telemetry alarm service)
metering-alarm_hosts: *infrastructure_hosts
# gnocchi (telemetry metrics storage)
metrics_hosts: *infrastructure_hosts
# manila (share service)
manila-infra_hosts: *infrastructure_hosts
manila-data_hosts: *infrastructure_hosts
# ceilometer compute agent (telemetry data collection)
metering-compute_hosts: *compute_hosts
Umgebungsanpassungen¶
Die optional bereitgestellten Dateien in /etc/openstack_deploy/env.d
ermöglichen die Anpassung von Ansible-Gruppen. Dadurch kann der Deployer festlegen, ob die Dienste in einem Container (Standard) oder auf dem Host (auf Metall) ausgeführt werden.
Für eine Ceph-Umgebung können Sie das Cinder-Volume
in einem Container ausführen. Dazu müssen Sie eine Datei /etc/openstack_deploy/env.d/cinder.yml
mit folgendem Inhalt erstellen:
---
# This file contains an example to show how to set
# the cinder-volume service to run in a container.
#
# Important note:
# When using LVM or any iSCSI-based cinder backends, such as NetApp with
# iSCSI protocol, the cinder-volume service *must* run on metal.
# Reference: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1226855
container_skel:
cinder_volumes_container:
properties:
is_metal: false
Benutzervariablen¶
Die Datei /etc/openstack_deploy/user_variables.yml
definiert die globalen Überschreibungen für die Standardvariablen.
Für diese Beispielumgebung konfigurieren wir einen HA-Lastenausgleich. Wir implementieren den Load Balancer (HAProxy) mit einer HA-Schicht (keepalived) auf den Infrastrukturhosts. Ihr /etc/openstack_deploy/user_variables.yml
muss den folgenden Inhalt haben, um haproxy, keepalived und ceph zu konfigurieren:
---
# Because we have three haproxy nodes, we need
# to one active LB IP, and we use keepalived for that.
# These variables must be defined when external_lb_vip_address or
# internal_lb_vip_address is set to FQDN.
## Load Balancer Configuration (haproxy/keepalived)
haproxy_keepalived_external_vip_cidr: "<external_ip_address>/<netmask>"
haproxy_keepalived_internal_vip_cidr: "172.29.236.9/32"
haproxy_keepalived_external_interface: ens2
haproxy_keepalived_internal_interface: br-mgmt
## Ceph cluster fsid (must be generated before first run)
## Generate a uuid using: python -c 'import uuid; print(str(uuid.uuid4()))'
generate_fsid: false
fsid: 116f14c4-7fe1-40e4-94eb-9240b63de5c1 # Replace with your generated UUID
## ceph-ansible settings
## See https://github.com/ceph/ceph-ansible/tree/master/group_vars for
## additional configuration options available.
monitor_address_block: "{{ cidr_networks.storage }}"
public_network: "{{ cidr_networks.storage }}"
cluster_network: "{{ cidr_networks.storage }}"
journal_size: 10240 # size in MB
# ceph-ansible automatically creates pools & keys for OpenStack services
openstack_config: true
cinder_ceph_client: cinder
glance_ceph_client: glance
glance_default_store: rbd
glance_rbd_store_pool: images
nova_libvirt_images_rbd_pool: vms
cinder_backends:
rbd_volumes:
volume_driver: cinder.volume.drivers.rbd.RBDDriver
rbd_pool: volumes
rbd_ceph_conf: /etc/ceph/ceph.conf
rbd_store_chunk_size: 8
volume_backend_name: rbddriver
rbd_user: "{{ cinder_ceph_client }}"
rbd_secret_uuid: "{{ cinder_ceph_client_uuid }}"
report_discard_supported: true