Standalone Containers based Deployment

This documentation explains how the underlying framework used by the Containerized Undercloud deployment mechanism can be reused to deploy a single node capable of running OpenStack services for development. Optional instructions for installing Ceph are included as well.

System Requirements for a Standalone Deployment

TripleO can be used as a standalone environment with all services installed on a single virtual or baremetal machine.

The machine you are deploying on must meet the following minimum specifications:

• 4 core CPU

• 8 GB memory

• 60 GB free disk space

Deploying a Standalone OpenStack node

1. Copy your SSH key to a non-root user on your machine (baremetal or VM) where you want to install the standalone services.:

   ssh-copy-id -i ~/.ssh/<your ssh key> <non-root-user>@<machine>
   

2. Connect to your machine as the non-root user.:

   ssh <non-root-user>@<machine>
   

3. Ensure a fully qualified hostname has been configured on the host being deployed on. For example:

   sudo hostnamectl set-hostname standalone.localdomain
   sudo hostnamectl set-hostname standalone.localdomain --transient
   

4. Enable needed repositories:

   Note

   Python3 is required for current releases of OpenStack which is supported on CentOS Stream 8.

   1. Download and install the python-tripleo-repos RPM from the appropriate RDO repository

      CentOS Strem 8

      Current Centos 8 RDO repository.

      sudo dnf install -y https://trunk.rdoproject.org/centos8/component/tripleo/current/python3-tripleo-repos-<version>.el8.noarch.rpm
      

      Note

      tripleo-repos removes any repositories that it manages before each run. This means all repositories must be specified in a single tripleo-repos call. As an example, the correct way to install the current and ceph repos is to run tripleo-repos current ceph, not two separate calls.

   2. Run tripleo-repos to install the appropriate repositories. The option below will enable the latest master TripleO packages, the latest promoted packages for all other OpenStack services and dependencies and the latest stable Ceph packages. There are other repository configurations available in tripleo-repos, see its --help output for details.

      sudo -E tripleo-repos current-tripleo-dev ceph
      

5. Install the TripleO CLI, which will pull in all other necessary packages as dependencies:

   sudo dnf install -y python3-tripleoclient
   

   Ceph

   Install the packages necessary to deploy Ceph.

   sudo dnf install -y util-linux lvm2 cephadm
   

6. Generate a file with the default ContainerImagePrepare value:

   openstack tripleo container image prepare default \
     --output-env-file $HOME/containers-prepare-parameters.yaml
   

   Note

   Update containers-prepare-parameters.yaml for your own needs. See Container Image Preparation for more details.

   Ceph

   Create a block device with logical volumes to be used as an OSD.

   sudo dd if=/dev/zero of=/var/lib/ceph-osd.img bs=1 count=0 seek=7G
   sudo losetup /dev/loop3 /var/lib/ceph-osd.img
   sudo pvcreate /dev/loop3
   sudo vgcreate vg2 /dev/loop3
   sudo lvcreate -n data-lv2 -l +100%FREE vg2
   

   Create a systemd service that restores the device on startup.

   cat <<EOF > /tmp/ceph-osd-losetup.service
   [Unit]
   Description=Ceph OSD losetup
   After=syslog.target
   
   [Service]
   Type=oneshot
   ExecStart=/bin/bash -c '/sbin/losetup /dev/loop3 || \
   /sbin/losetup /dev/loop3 /var/lib/ceph-osd.img ; partprobe /dev/loop3'
   ExecStop=/sbin/losetup -d /dev/loop3
   RemainAfterExit=yes
   
   [Install]
   WantedBy=multi-user.target
   EOF
   
   sudo mv /tmp/ceph-osd-losetup.service /etc/systemd/system/
   sudo systemctl enable ceph-osd-losetup.service
   

7. Configure basic standalone parameters which include network configuration and some deployment options.

   Warning

   The standalone deployment requires one network interface on the deployment machine and that interface will be reconfigured as per the parameters you specify below. The interface you want to use is specified by name in the $INTERFACE parameter below and passed as the NeutronPublicInterface in the standalone_parameters.yaml. If you only have one interface on your machine be advised that it will be reconfigured to have the IP address specified in $IP. If that is a remote box you may lose connectivity to it. Any other network interfaces are left untouched.

   For the standalone deployment we use a single NIC on the target machine which is reconfigured and set as a member of an ovs bridge, br-ctlplane. Two examples follow which can be copy/pasted as is - depending on your setup. You should only have to change the name of the interface to match whatever it is called on your system. Ideally you will have two network interfaces, so that one is used for the standalone deployment, whilst the other will be left untouched. This can be especially important if you are deploying on a remote box (e.g. via ssh).

   The following configuration can be used for a system with 2 network interfaces. This configuration assumes the first interface is used for management and we will only configure the second interface. The deployment assumes the second interface has a “public” /24 network which will be used for the cloud endpoints and public VM connectivity.

   In addition to the IPs used on eth1, a virtual IP will be added and managed by pacemaker. This must be a different address to the other IP as one will be bound to by haproxy while the other by backend services on the same.

   export IP=192.168.24.2
   export VIP=192.168.24.3
   export NETMASK=24
   export INTERFACE=eth1
   

   You will now create the standalone_parameters.yaml. The $IP, $VIP, $NETMASK, and $INTERFACE will be replaced with the values from the export commands.

   cat <<EOF > $HOME/standalone_parameters.yaml
   parameter_defaults:
     CloudName: $IP
     ControlPlaneStaticRoutes: []
     Debug: true
     DeploymentUser: $USER
     DnsServers:
       - 1.1.1.1
       - 8.8.8.8
     DockerInsecureRegistryAddress:
       - $IP:8787
     NeutronPublicInterface: $INTERFACE
     # domain name used by the host
     CloudDomain: localdomain
     NeutronDnsDomain: localdomain
     # re-use ctlplane bridge for public net, defined in the standalone
     # net config (do not change unless you know what you're doing)
     NeutronBridgeMappings: datacentre:br-ctlplane
     NeutronPhysicalBridge: br-ctlplane
     # enable to force metadata for public net
     #NeutronEnableForceMetadata: true
     StandaloneEnableRoutedNetworks: false
     StandaloneHomeDir: $HOME
     InterfaceLocalMtu: 1500
     # Needed if running in a VM, not needed if on baremetal
     NovaComputeLibvirtType: qemu
   EOF
   

   The following configuration can be used for a system with a single network interface. This configuration assumes that the interface is shared for management and cloud functions. This configuration requires there be at least 3 ip addresses available for configuration. 1 ip is used for the cloud endpoints, 1 is used for an internal router and 1 is used as a floating IP.

   export IP=192.168.24.2
   export VIP=192.168.24.3
   export NETMASK=24
   export GATEWAY=192.168.24.1
   export INTERFACE=eth0
   

   You will now create the standalone_parameters.yaml. The $IP, $NETMASK, $GATEWAY, and $INTERFACE will be replaced with the values from the export commands.

   cat <<EOF > $HOME/standalone_parameters.yaml
   parameter_defaults:
     CloudName: $IP
     # default gateway
     ControlPlaneStaticRoutes:
       - ip_netmask: 0.0.0.0/0
         next_hop: $GATEWAY
         default: true
     Debug: true
     DeploymentUser: $USER
     DnsServers:
       - 1.1.1.1
       - 8.8.8.8
     # needed for vip & pacemaker
     KernelIpNonLocalBind: 1
     DockerInsecureRegistryAddress:
       - $IP:8787
     NeutronPublicInterface: $INTERFACE
     # domain name used by the host
     CloudDomain: localdomain
     NeutronDnsDomain: localdomain
     # re-use ctlplane bridge for public net, defined in the standalone
     # net config (do not change unless you know what you're doing)
     NeutronBridgeMappings: datacentre:br-ctlplane
     NeutronPhysicalBridge: br-ctlplane
     # enable to force metadata for public net
     #NeutronEnableForceMetadata: true
     StandaloneEnableRoutedNetworks: false
     StandaloneHomeDir: $HOME
     InterfaceLocalMtu: 1500
     # Needed if running in a VM, not needed if on baremetal
     NovaComputeLibvirtType: qemu
   EOF
   

   Ceph

   Establish an IP address on which Ceph will listen. Because the 192.168.24.0/24 network containing the cloud IP and VIP defined earlier is not configured until openstack tripleo deploy is run, we need Ceph to run on a different network if we’re going to deploy Ceph before the overcloud as described in Deploying Ceph with TripleO. Any IP on the VM may be used including the IP on the default libvirt network 192.168.122.0/24. For example:

   export CEPH_IP=192.168.122.252
   

   Create an OSD spec file which references the block device with the logical volumes created earlier.

   cat <<EOF > $HOME/osd_spec.yaml
   data_devices:
     paths:
       - /dev/vg2/data-lv2
   EOF
   

   Use the Ceph IP and OSD spec file to create a Ceph spec file which will describe the Ceph cluster in a format cephadm can parse. The –standalone option covers a special case for this scenario because ‘openstack overcloud node provision’ is not used.

   sudo openstack overcloud ceph spec \
      --standalone \
      --mon-ip $CEPH_IP \
      --osd-spec $HOME/osd_spec.yaml \
      --output $HOME/ceph_spec.yaml
   

   Create the ceph-admin user by passing the Ceph spec created earlier and use the –standalone option.

   sudo openstack overcloud ceph user enable \
      --standalone \
      $HOME/ceph_spec.yaml \
   

   Though Ceph will be configured to run on a single host via the –single-host-defaults option, this deployment only has a single OSD so it cannot replicate data even on the same host. Create an initial Ceph configuration to disable replication:

   cat <<EOF > $HOME/initial_ceph.conf
   [global]
   osd pool default size = 1
   [mon]
   mon_warn_on_pool_no_redundancy = false
   EOF
   

   Additional Ceph daemons can be added to the Ceph cluster, but only Ceph mds and nfs daemons are supported. Create a Ceph_daemon spec definition, and add the required information for each daemon:

   cat <<EOF > $HOME/ceph_daemon.yaml
   ceph_nfs:
     cephfs_data: 'manila_data'
     cephfs_metadata: 'manila_metadata'
   EOF
   

   Deploy Ceph by passing the IP, Ceph spec, Ceph conf and Ceph daemon definition created above. Use the options –standalone, –single-host-defaults, –skip-hosts-config and –skip-container-registry-config. Use openstack overcloud ceph deploy –help for details on what these options do. User creation is skipped via –skip-user-create because it was handled in the previous step. Specify what the output deployed Ceph file should be called. The CephIngress deployment can be skipped in a standalone environment if there is no network isolation and the CephNFS daemon already has a stable floating ip.

   sudo openstack overcloud ceph deploy \
      --mon-ip $CEPH_IP \
      --ceph-spec $HOME/ceph_spec.yaml \
      --config $HOME/initial_ceph.conf \
      --daemon $HOME/ceph_daemon.yaml \
      --standalone \
      --single-host-defaults \
      --skip-hosts-config \
      --skip-container-registry-config \
      --skip-user-create \
      --output $HOME/deployed_ceph.yaml
   

   A Ceph RBD cluster should now be deployed and sudo cephadm shell – ceph -s may be used to check its status. The deployed_ceph.yaml file is a Heat environment file describing the deployed Ceph cluster and should be used during overcloud deployment.

8. Run the deploy command:

   sudo openstack tripleo deploy \
     --templates \
     --local-ip=$IP/$NETMASK \
     --control-virtual-ip $VIP \
     -e /usr/share/openstack-tripleo-heat-templates/environments/standalone/standalone-tripleo.yaml \
     -r /usr/share/openstack-tripleo-heat-templates/roles/Standalone.yaml \
     -e $HOME/containers-prepare-parameters.yaml \
     -e $HOME/standalone_parameters.yaml \
     --output-dir $HOME
   

   Ceph

   Include the Ceph environment files in the deploy command:

   sudo openstack tripleo deploy \
     --templates \
     --local-ip=$IP/$NETMASK \
     --control-virtual-ip $VIP \
     -e /usr/share/openstack-tripleo-heat-templates/environments/standalone/standalone-tripleo.yaml \
     -e /usr/share/openstack-tripleo-heat-templates/environments/cephadm/cephadm.yaml \
     -r /usr/share/openstack-tripleo-heat-templates/roles/Standalone.yaml \
     -e $HOME/containers-prepare-parameters.yaml \
     -e $HOME/standalone_parameters.yaml \
     -e $HOME/deployed_ceph.yaml \
     --output-dir $HOME
   

9. Check the deployed OpenStack Services

   At the end of the deployment, a clouds.yaml configuration file is placed in the /root/.config/openstack folder. This can be used with the openstack client to query the OpenStack services.

   export OS_CLOUD=standalone
   openstack endpoint list
   

10. Cleanup a deployment

    If you want to remove the services and files installed by Standalone after a deployment failure, or just to re-deploy from scratch, you can run the following script:

    #!/bin/bash
    echo "Tearing down TripleO environment"
    if type pcs &> /dev/null; then
        sudo pcs cluster destroy
    fi
    if type podman &> /dev/null; then
        echo "Removing podman containers and images (takes times...)"
        sudo podman rm -af
        sudo podman rmi -af
    fi
    sudo rm -rf \
        /var/lib/tripleo-config \
        /var/lib/config-data /var/lib/container-config-scripts \
        /var/lib/container-puppet \
        /var/lib/heat-config \
        /var/lib/image-serve \
        /var/lib/containers \
        /etc/systemd/system/tripleo* \
        /var/lib/mysql/* \
        /etc/openstack
    rm -rf ~/.config/openstack
    sudo systemctl daemon-reload
    

    Ceph

    To remove Ceph and its block device run the following.

    FSID=$(sudo ls /var/lib/ceph)
    sudo cephadm rm-cluster --force --fsid $FSID
    
    sudo systemctl stop ceph-osd-losetup.service
    sudo systemctl disable ceph-osd-losetup.service
    sudo lvremove --force /dev/vg2/data-lv2
    sudo vgremove --force vg2
    sudo pvremove --force /dev/loop3
    sudo losetup -d /dev/loop3
    sudo rm -f /var/lib/ceph-osd.img
    sudo partprobe
    

Manual deployments with ansible

With the --output-only option enabled, the installation stops before Ansible playbooks would be normally executed. Instead, it only creates a Heat stack, then downloads the ansible deployment data and playbooks to --output-dir for the manual execution.

Note

When updating the existing standalone installation, keep in mind the special cases described in Understanding undercloud/standalone stack updates. There is an additional case for the --force-stack-update flag that might need to be used, when in the --output-only mode. That is when you cannot know the results of the actual deployment before ansible has started.

Example: 1 NIC, Using Compute with Tenant and Provider Networks

The following example is based on the single NIC configuration and assumes that the environment had at least 3 total IP addresses available to it. The IPs are used for the following:

• 1 IP address for the OpenStack services (this is the --local-ip from the deploy command)

• 1 IP used as a Virtual Router to provide connectivity to the Tenant network is used for the OpenStack services (is automatically assigned in this example)

• The remaining IP addresses (at least 1) are used for Floating IPs on the provider network.

The following is an example post deployment launching of a VM using the private tenant network and the provider network.

1. Create helper variables for the configuration:

   # standalone with tenant networking and provider networking
   export OS_CLOUD=standalone
   export GATEWAY=192.168.24.1
   export STANDALONE_HOST=192.168.24.2
   export PUBLIC_NETWORK_CIDR=192.168.24.0/24
   export PRIVATE_NETWORK_CIDR=192.168.100.0/24
   export PUBLIC_NET_START=192.168.24.4
   export PUBLIC_NET_END=192.168.24.5
   export DNS_SERVER=1.1.1.1
   

2. Initial Nova and Glance setup:

   # nova flavor
   openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny
   # basic cirros image
   wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
   openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img
   # nova keypair for ssh
   ssh-keygen
   openstack keypair create --public-key ~/.ssh/id_rsa.pub default
   

3. Setup a simple network security group:

   # create basic security group to allow ssh/ping/dns
   openstack security group create basic
   # allow ssh
   openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0
   # allow ping
   openstack security group rule create --protocol icmp basic
   # allow DNS
   openstack security group rule create --protocol udp --dst-port 53:53 basic
   

4. Create Neutron Networks:

   openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
   openstack network create --internal private
   openstack subnet create public-net \
       --subnet-range $PUBLIC_NETWORK_CIDR \
       --no-dhcp \
       --gateway $GATEWAY \
       --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
       --network public
   openstack subnet create private-net \
       --subnet-range $PRIVATE_NETWORK_CIDR \
       --network private
   

5. Create Virtual Router:

   # create router
   # NOTE(aschultz): In this case an IP will be automatically assigned
   # out of the allocation pool for the subnet.
   openstack router create vrouter
   openstack router set vrouter --external-gateway public
   openstack router add subnet vrouter private-net
   

6. Create floating IP:

   # create floating ip
   openstack floating ip create public
   

7. Launch Instance:

   # launch instance
   openstack server create --flavor tiny --image cirros --key-name default --network private --security-group basic myserver
   

8. Assign Floating IP:

   openstack server add floating ip myserver <FLOATING_IP>
   

9. Test SSH:

   # login to vm
   ssh cirros@<FLOATING_IP>
   

Networking Details

Here’s a basic diagram of where the connections occur in the system for this example:

+-------------------------------------------------------+
|Standalone Host                                        |
|                                                       |
|              +----------------------------+           |
|              |          vrouter           |           |
|              |                            |           |
|              +------------+ +-------------+           |
|              |192.168.24.4| |             |           |
|              |192.168.24.3| |192.168.100.1|           |
|              +---------+------+-----------+           |
|      +-------------+   |      |                       |
|      |  myserver   |   |      |                       |
|      |192.168.100.2|   |      |                       |
|      +-------+-----+   |    +-+                       |
|              |         |    |                         |
|              |         |    |                         |
|             ++---------+----+-+   +-----------------+ |
|             |     br-int      +---+   br-ctlplane   | |
|             |                 |   |  192.168.24.2   | |
|             +------+----------+   +--------+--------+ |
|                    |                       |          |
|             +------+----------+            |          |
|             |     br-tun      |            |          |
|             |                 |            |          |
|             +-----------------+       +----+---+      |
|                                       |  eth0  |      |
+---------------------------------------+----+---+------+
                                             |
                                             |
                                     +-------+-----+
                                     |   switch    |
                                     +-------------+

Example: 1 NIC, Using Compute with Provider Network

The following example is based on the single NIC configuration and assumes that the environment had at least 4 total IP addresses available to it. The IPs are used for the following:

• 1 IP address for the OpenStack services (this is the --local-ip from the deploy command)

• 1 IP used as a Virtual Router to provide connectivity to the Tenant network is used for the OpenStack services

• 1 IP used for DHCP on the provider network

• The remaining IP addresses (at least 1) are used for Floating IPs on the provider network.

The following is an example post deployment launching of a VM using the private tenant network and the provider network.

1. Create helper variables for the configuration:

   # standalone with provider networking
   export OS_CLOUD=standalone
   export GATEWAY=192.168.24.1
   export STANDALONE_HOST=192.168.24.2
   export VROUTER_IP=192.168.24.3
   export PUBLIC_NETWORK_CIDR=192.168.24.0/24
   export PUBLIC_NET_START=192.168.24.4
   export PUBLIC_NET_END=192.168.24.5
   export DNS_SERVER=1.1.1.1
   

2. Initial Nova and Glance setup:

   # nova flavor
   openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny
   # basic cirros image
   wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
   openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img
   # nova keypair for ssh
   ssh-keygen
   openstack keypair create --public-key ~/.ssh/id_rsa.pub default
   

3. Setup a simple network security group:

   # create basic security group to allow ssh/ping/dns
   openstack security group create basic
   # allow ssh
   openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0
   # allow ping
   openstack security group rule create --protocol icmp basic
   # allow DNS
   openstack security group rule create --protocol udp --dst-port 53:53 basic
   

4. Create Neutron Networks:

   openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
   openstack subnet create public-net \
       --subnet-range $PUBLIC_NETWORK_CIDR \
       --gateway $GATEWAY \
       --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
       --network public \
       --host-route destination=169.254.169.254/32,gateway=$VROUTER_IP \
       --host-route destination=0.0.0.0/0,gateway=$GATEWAY \
       --dns-nameserver $DNS_SERVER
   

5. Create Virtual Router:

   # vrouter needed for metadata route
   # NOTE(aschultz): In this case we're creating a fixed IP because we need
   # to create a manual route in the subnet for the metadata service
   openstack router create vrouter
   openstack port create --network public --fixed-ip subnet=public-net,ip-address=$VROUTER_IP vrouter-port
   openstack router add port vrouter vrouter-port
   

6. Launch Instance:

   # launch instance
   openstack server create --flavor tiny --image cirros --key-name default --network public --security-group basic myserver
   

7. Test SSH:

   # login to vm
   ssh cirros@<VM_IP>
   

Networking Details

Here’s a basic diagram of where the connections occur in the system for this example:

+----------------------------------------------------+
|Standalone Host                                     |
|                                                    |
|    +------------+   +------------+                 |
|    |  myserver  |   |  vrouter   |                 |
|    |192.168.24.4|   |192.168.24.3|                 |
|    +---------+--+   +-+----------+                 |
|              |        |                            |
|          +---+--------+----+   +-----------------+ |
|          |     br-int      +---+   br-ctlplane   | |
|          |                 |   |  192.168.24.2   | |
|          +------+----------+   +--------+--------+ |
|                 |                       |          |
|          +------+----------+            |          |
|          |     br-tun      |            |          |
|          |                 |            |          |
|          +-----------------+       +----+---+      |
|                                    |  eth0  |      |
+------------------------------------+----+---+------+
                                          |
                                          |
                                  +-------+-----+
                                  |   switch    |
                                  +-------------+

Example: 2 NIC, Using Compute with Tenant and Provider Networks

The following example is based on the dual NIC configuration and assumes that the environment has an entire IP range available to it on the provider network. We are assuming the following would be reserved on the provider network:

• 1 IP address for a gateway on the provider network

• 1 IP address for OpenStack Endpoints

• 1 IP used as a Virtual Router to provide connectivity to the Tenant network is used for the OpenStack services (is automatically assigned in this example)

• The remaining IP addresses (at least 1) are used for Floating IPs on the provider network.

The following is an example post deployment launching of a VM using the private tenant network and the provider network.

1. Create helper variables for the configuration:

   # standalone with tenant networking and provider networking
   export OS_CLOUD=standalone
   export GATEWAY=192.168.24.1
   export STANDALONE_HOST=192.168.0.2
   export PUBLIC_NETWORK_CIDR=192.168.24.0/24
   export PRIVATE_NETWORK_CIDR=192.168.100.0/24
   export PUBLIC_NET_START=192.168.0.3
   export PUBLIC_NET_END=192.168.24.254
   export DNS_SERVER=1.1.1.1
   

2. Initial Nova and Glance setup:

   # nova flavor
   openstack flavor create --ram 512 --disk 1 --vcpu 1 --public tiny
   # basic cirros image
   wget https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img
   openstack image create cirros --container-format bare --disk-format qcow2 --public --file cirros-0.4.0-x86_64-disk.img
   # nova keypair for ssh
   ssh-keygen
   openstack keypair create --public-key ~/.ssh/id_rsa.pub default
   

3. Setup a simple network security group:

   # create basic security group to allow ssh/ping/dns
   openstack security group create basic
   # allow ssh
   openstack security group rule create basic --protocol tcp --dst-port 22:22 --remote-ip 0.0.0.0/0
   # allow ping
   openstack security group rule create --protocol icmp basic
   # allow DNS
   openstack security group rule create --protocol udp --dst-port 53:53 basic
   

4. Create Neutron Networks:

   openstack network create --external --provider-physical-network datacentre --provider-network-type flat public
   openstack network create --internal private
   openstack subnet create public-net \
       --subnet-range $PUBLIC_NETWORK_CIDR \
       --no-dhcp \
       --gateway $GATEWAY \
       --allocation-pool start=$PUBLIC_NET_START,end=$PUBLIC_NET_END \
       --network public
   openstack subnet create private-net \
       --subnet-range $PRIVATE_NETWORK_CIDR \
       --network private
   

5. Create Virtual Router:

   # create router
   # NOTE(aschultz): In this case an IP will be automatically assigned
   # out of the allocation pool for the subnet.
   openstack router create vrouter
   openstack router set vrouter --external-gateway public
   openstack router add subnet vrouter private-net
   

6. Create floating IP:

   # create floating ip
   openstack floating ip create public
   

7. Launch Instance:

   # launch instance
   openstack server create --flavor tiny --image cirros --key-name default --network private --security-group basic myserver
   

8. Assign Floating IP:

   openstack server add floating ip myserver <FLOATING_IP>
   

9. Test SSH:

   # login to vm
   ssh cirros@<FLOATING_IP>
   

Networking Details

Here’s a basic diagram of where the connections occur in the system for this example:

+---------------------------------------------------------------------+
|Standalone Host                                                      |
|                                                                     |
|            +----------------------------+                           |
|            |          vrouter           |                           |
|            |                            |                           |
|            +------------+ +-------------+                           |
|            |192.168.24.4| |             |                           |
|            |192.168.24.3| |192.168.100.1|                           |
|            +---------+------+-----------+                           |
|    +-------------+   |      |                                       |
|    |  myserver   |   |      |                                       |
|    |192.168.100.2|   |      |                                       |
|    +-------+-----+   |    +-+                                       |
|            |         |    |                                         |
|           ++---------+----+-+   +-----------------+                 |
|           |     br-int      +---+   br-ctlplane   |                 |
|           |                 |   |  192.168.24.2   |                 |
|           +------+----------+   +------------+----+                 |
|                  |                           |                      |
|           +------+----------+                |                      |
|           |     br-tun      |                |                      |
|           |                 |                |                      |
|           +-----------------+                |       +----------+   |
|                                        +-----+---+   |   eth0   |   |
|                                        |  eth1   |   | 10.0.1.4 |   |
+----------------------------------------+-----+---+---+-----+----+---+
                                               |             |
                                               |             |
                                        +------+------+      |
                                        |   switch    +------+
                                        +-------------+

Example: 2 nodes, 2 NIC, Using remote Compute with Tenant and Provider Networks

The following example uses two nodes and the split control plane method to simulate a distributed edge computing deployment. The first Heat stack deploys a controller node which could run in a Centralized Data Center. The second Heat stack deploys a second node which could run at another location on the Aggregation Edge Layer. The second node runs the nova-compute service, Ceph, and the cinder-volume service. Both nodes use the networking configuration found in the 2 NIC, Using Compute with Tenant and Provider Network example.

Deploy the central controller node

To deploy the first node, follow the Deploying a Standalone OpenStack node section described earlier in the document but also include the following parameters:

parameter_defaults:
  GlanceBackend: swift
  StandaloneExtraConfig:
    oslo_messaging_notify_use_ssl: false
    oslo_messaging_rpc_use_ssl: false

The above configures the Swift backend for Glance so that images are pulled by the remote compute node over HTTP and ensures that Oslo messaging does not use SSL for RPC and notifications. Note that in a production deployment this will result in sending unencrypted traffic over WAN connections.

When configuring the network keep in mind that it will be necessary for both standalone systems to be able to communicate with each other. E.g. the $IP for the first node will be in the endpoint map that later will be extracted from the first node and passed as a parameter to the second node for it to access its endpoints. In this standalone example both servers share an L2 network. In a production edge deployment it may be necessary instead to route.

When deploying the first node with openstack tripleo deploy, pass the --keep-running option so the Heat processes continue to run.

Extract deployment information from the controller node

The Heat processes were kept running in the previous step because this allows the Heat stack to be queried after the deployment in order to extract parameters that the second node’s deployment will need as input. To extract these parameters into separate files in a directory, (e.g. DIR=export_control_plane), which may then be exported to the second node, run the following:

unset OS_CLOUD
export OS_AUTH_TYPE=none
export OS_ENDPOINT=http://127.0.0.1:8006/v1/admin

openstack stack output show standalone EndpointMap --format json \
| jq '{"parameter_defaults": {"EndpointMapOverride": .output_value}}' \
> $DIR/endpoint-map.json

openstack stack output show standalone HostsEntry -f json \
| jq -r '{"parameter_defaults":{"ExtraHostFileEntries": .output_value}}' \
> $DIR/extra-host-file-entries.json

In addition to the above create a file in the same directory, e.g. $DIR/oslo.yaml, containing Oslo overrides for the second compute node:

parameter_defaults:
  StandaloneExtraConfig:
    oslo_messaging_notify_use_ssl: false
    oslo_messaging_rpc_use_ssl: false

In addition to the parameters above, add the oslo_messaging_notify_password and oslo_messaging_rpc_password parameters. Their values may be extracted from /etc/puppet/hieradata/service_configs.json on the first node. The following command will do this for you:

sudo egrep "oslo.*password" /etc/puppet/hieradata/service_configs.json \
| sed -e s/\"//g -e s/,//g >> $DIR/oslo.yaml

In addition to the above, you need to create $DIR/$HOME/export_control_plane/all-nodes-extra-map-data.json which will contain the following AllNodesExtraMapData. You first need to locate the group_vars generated by tripleo-ansible, located in the config-download directory.

Then you can generate the correct Heat environment with the following command:

STANDALONE_LATEST=$(find $HOME/standalone-ansible-* -type d -printf "%T@ %p\n" | sort -n | cut -d' ' -f 2- | tail -n 1)
python3 -c "import json; t = {'parameter_defaults': {'AllNodesExtraMapData': json.loads(open('$HOME/$STANDALONE_LATEST/group_vars/overcloud.json').read()) }}; print(t)" > $DIR/all-nodes-extra-map-data.json

Set a copy of the first node’s passwords aside for the second node:

cp $HOME/tripleo-standalone-passwords.yaml $DIR/passwords.yaml

Put a copy of the directory containing the extracted information, e.g. $DIR, on the second node to be deployed.

Deploy the remote compute node

On a second node, follow the procedure at the beginning of this document to deploy a standalone OpenStack node with Ceph up to the point where you have the following files:

• $HOME/standalone_parameters.yaml

• $HOME/containers-prepare-parameters.yaml

• $HOME/deployed_ceph.yaml

When setting the $IP of the second node, keep in mind that it should have a way to reach the endpoints of the first node as found in the endpoint-map.json, which was extracted from the first node.

Create an environment file, e.g. $HOME/standalone_edge.yaml, with the following content:

resource_registry:
  OS::TripleO::Services::CACerts: OS::Heat::None
  OS::TripleO::Services::CinderApi: OS::Heat::None
  OS::TripleO::Services::CinderScheduler: OS::Heat::None
  OS::TripleO::Services::Clustercheck: OS::Heat::None
  OS::TripleO::Services::HAproxy: OS::Heat::None
  OS::TripleO::Services::Horizon: OS::Heat::None
  OS::TripleO::Services::Keystone: OS::Heat::None
  OS::TripleO::Services::Memcached: OS::Heat::None
  OS::TripleO::Services::MySQL: OS::Heat::None
  OS::TripleO::Services::NeutronApi: OS::Heat::None
  OS::TripleO::Services::NeutronDhcpAgent: OS::Heat::None
  OS::TripleO::Services::NovaApi: OS::Heat::None
  OS::TripleO::Services::NovaConductor: OS::Heat::None
  OS::TripleO::Services::NovaConsoleauth: OS::Heat::None
  OS::TripleO::Services::NovaIronic: OS::Heat::None
  OS::TripleO::Services::NovaMetadata: OS::Heat::None
  OS::TripleO::Services::NovaPlacement: OS::Heat::None
  OS::TripleO::Services::NovaScheduler: OS::Heat::None
  OS::TripleO::Services::NovaVncProxy: OS::Heat::None
  OS::TripleO::Services::OsloMessagingNotify: OS::Heat::None
  OS::TripleO::Services::OsloMessagingRpc: OS::Heat::None
  OS::TripleO::Services::Redis: OS::Heat::None
  OS::TripleO::Services::SwiftProxy: OS::Heat::None
  OS::TripleO::Services::SwiftStorage: OS::Heat::None
  OS::TripleO::Services::SwiftRingBuilder: OS::Heat::None

parameter_defaults:
  CinderRbdAvailabilityZone: edge1
  GlanceBackend: swift
  GlanceCacheEnabled: true

The above file disables additional resources which /usr/share/openstack-tripleo-heat-templates/environments/standalone/standalone-tripleo.yaml does not disable since it represents a compute node which will consume those resources from the earlier deployed controller node. It also sets the Glance blackened to Swift and enables Glance caching so that after images are pulled from the central node once, they do not need to be pulled again. Finally the above sets the Cinder RBD availability zone a separate availability zone for the remote compute and cinder volume service.

Deploy the second node with the following:

sudo openstack tripleo deploy \
    --templates \
    --local-ip=$IP/$NETMASK \
    -r /usr/share/openstack-tripleo-heat-templates/roles/Standalone.yaml \
    -e /usr/share/openstack-tripleo-heat-templates/environments/standalone/standalone-tripleo.yaml \
    -e /usr/share/openstack-tripleo-heat-templates/environments/cephadm/cephadm-rbd-only.yaml \
    -e $HOME/containers-prepare-parameters.yaml \
    -e $HOME/standalone_parameters.yaml \
    -e $HOME/deployed_ceph.yaml \
    -e $HOME/standalone_edge.yaml \
    -e $HOME/export_control_plane/passwords.yaml \
    -e $HOME/export_control_plane/endpoint-map.json \
    -e $HOME/export_control_plane/all-nodes-extra-map-data.json \
    -e $HOME/export_control_plane/extra-host-file-entries.json \
    -e $HOME/export_control_plane/oslo.yaml \
    --output-dir $HOME

The example above assumes that export_control_plane is the name of the directory which contains the content extracted from the controller node.

Discover the remote compute node from the central controller node

After completing the prior steps, the openstack command will only work on the central node because of how the OS_CLOUD environment variable works with that nodes /root/.config/openstack folder, which in turn assumes that keystone is running the central node and not the edge nodes. To run openstack commands on edge nodes, override the auth URL to point to keystone on the central node.

On the central controller node run the following command to discover the new compute node:

sudo docker exec -it nova_api nova-manage cell_v2 discover_hosts --verbose

List the available zones, hosts, and hypervisors and look for the new node:

export OS_CLOUD=standalone
openstack availability zone list
openstack host list
openstack hypervisor list

Take note of the zone and host list so that you can use that information to schedule an instance on the new compute node. The following example shows the result of deploying two new external compute nodes:

[root@overcloud0 ~]# sudo docker exec -it nova_api nova-manage cell_v2 discover_hosts --verbose
Found 2 cell mappings.
Skipping cell0 since it does not contain hosts.
Getting computes from cell 'default': 631301c8-1744-4beb-8aa0-6a90aef6cd2d
Checking host mapping for compute host 'overcloud0.localdomain': 0884a9fc-9ef6-451c-ab22-06f825484e5e
Checking host mapping for compute host 'overcloud1.localdomain': 00fb920d-ef12-4a2a-9aa4-ba987d8a5e17
Creating host mapping for compute host 'overcloud1.localdomain': 00fb920d-ef12-4a2a-9aa4-ba987d8a5e17
Checking host mapping for compute host 'overcloud2.localdomain': 3e3a3cd4-5959-405a-b632-0b64415c43f2
Creating host mapping for compute host 'overcloud2.localdomain': 3e3a3cd4-5959-405a-b632-0b64415c43f2
Found 2 unmapped computes in cell: 631301c8-1744-4beb-8aa0-6a90aef6cd2d
[root@overcloud0 ~]# openstack hypervisor list
+----+------------------------+-----------------+--------------+-------+
| ID | Hypervisor Hostname    | Hypervisor Type | Host IP      | State |
+----+------------------------+-----------------+--------------+-------+
|  1 | overcloud0.example.com | QEMU            | 192.168.24.2 | up    |
|  2 | overcloud1.example.com | QEMU            | 192.168.24.7 | up    |
|  3 | overcloud2.example.com | QEMU            | 192.168.24.8 | up    |
+----+------------------------+-----------------+--------------+-------+
[root@overcloud0 ~]#

Note that the hostnames of the hypervisors above were set prior to the deployment.

On the central controller node run the following to create a host aggregate for a remote compute node:

openstack aggregate create HA-edge1 --zone edge1
openstack aggregate add host HA-edge1 overcloud1.localdomain

To test, follow the example from “2 NIC, Using remote Compute with Tenant and Provider Networks”, except when creating the instance use the –availability-zone option to schedule the instance on the new remote compute node:

openstack server create --flavor tiny --image cirros \
--key-name demokp --network private --security-group basic \
myserver --availability-zone edge1

On the first node, run the following command to create a volume on the second node:

openstack volume create --size 1 --availability-zone edge1 myvol

On the second node, verify that the instance is running locally and and that the Cinder volume was created on the local Ceph server:

[root@overcloud1 ~]# docker exec nova_libvirt virsh list
 Id    Name                           State
----------------------------------------------------
 1     instance-00000001              running

[root@overcloud1 ~]# docker exec -ti ceph-mon rbd -p volumes ls -l
NAME                                        SIZE PARENT FMT PROT LOCK
volume-f84ae4f5-cc25-4ed4-8a58-8b1408160e03 1GiB          2
[root@overcloud1 ~]#

Topology Details

Here’s a basic diagram of where the connections occur in the system for this example:

+-------------------------+         +-------------------------+
|standalone|compute|edge|1|         |standalone|compute|edge|2|
+-----------------------+-+         +-+-----------------------+
                        |             |
                   +----+-------------+----------+
                   |standalone|controller|central|
                   +-----------------------------+