--- title: "How to share a private network between 2 Public Cloud projects" description: "Find out how to share a private network between two OVHcloud Public Cloud projects" url: https://docs.ovhcloud.com/pt/guides/public-cloud/network-services/create-share-private-network lang: pt lastUpdated: 2026-02-10 --- # How to share a private network between 2 Public Cloud projects ## Objective This tutorial will show you how to connect two projects on an internal network. It allows you to synchronize production and preproduction environments across several projects. ## Requirements - You have 2 or more Public Cloud projects. - Both projects must be placed in the same vRack. Refer to the following guides: - [Getting started with the OpenStack API](/pt/guides/public-cloud/compute/starting-with-nova.md). - [Attaching a Floating IP to a Public Cloud instance](/pt/guides/public-cloud/network-services/attach-floating-ip-to-instance.md). - [Managing firewall rules and port security on networks using OpenStack CLI ](/pt/guides/public-cloud/cross-functional/security-group-private-network.md). ## Instructions ### In the first project #### 1. List the project IDs ```sh openstack project list -c ID -f value ``` Example output: ```sh abc123def456ghi789jkl0mnopqr1234 ``` #### 2. Create the network that will be shared ```sh openstack network create shared_private_network ``` Example output: ```sh +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | admin_state_up | UP | | id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | name | shared_private_network | | project_id | abc123def456ghi789jkl0mnopqr1234 | +---------------------------+--------------------------------------+ ``` #### 3. Create two subnets, one for instances on our project and one shared with another project **For project 1 (local):** ```sh openstack subnet create --subnet-range 10.0.2.0/24 --network shared_private_network --allocation-pool start=10.0.2.2,end=10.0.2.254 local_subnet_v2 ``` Example output: ```sh +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.2.2-10.0.2.254 | | cidr | 10.0.2.0/24 | | id | aa5d399a-6acf-4328-a7a8-e962fa16b792 | | name | local_subnet_v2 | | network_id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | project_id | abc123def456ghi789jkl0mnopqr1234 | +----------------------+--------------------------------------+ ``` **For project 2 (shared):** ```sh openstack subnet create --subnet-range 10.0.3.0/24 --network shared_private_network --allocation-pool start=10.0.3.2,end=10.0.3.254 shared_subnet_v2 ``` Example output: ```sh +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.3.2-10.0.3.254 | | cidr | 10.0.3.0/24 | | id | 441d0d65-2e1b-413c-ad28-2876f1c14025 | | name | shared_subnet_v2 | | network_id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | project_id | abc123def456ghi789jkl0mnopqr1234 | +----------------------+--------------------------------------+ ``` #### 4. Share this network (and associated subnets) with the second project ```sh NETWORK_ID=$(openstack network list --name shared_private_network -c ID -f value) openstack network rbac create --target-project def456ghi789jkl0mnopqr1234 --action access_as_shared --type network ${NETWORK_ID} ``` Example output: ```sh +-------------------+--------------------------------------+ | Field | Value | +-------------------+--------------------------------------+ | action | access_as_shared | | id | 890c123d-4567-89ef-gh12-3456789ijkl0 | | object_id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | target_project_id | def456ghi789jkl0mnopqr1234 | | type | network | +-------------------+--------------------------------------+ ``` #### 5. Create a port on the local subnet and an instance associated with it ```sh openstack port create --network shared_private_network --fixed-ip subnet=local_subnet_v2 local_port_v2 ``` Example output: ```sh +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | id | 99cb41a8-3639-4717-81e0-e75618bd7775 | | name | local_port_v2 | | network_id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | fixed_ips | ip_address='10.0.2.185', subnet_id='aa5d399a-6acf-4328-a7a8-e962fa16b792' | +-------------------------+--------------------------------------+ ``` ```sh openstack server create --port 99cb41a8-3639-4717-81e0-e75618bd7775 --security-group default --key-name my_key --flavor d2-2 --image "Ubuntu 22.04" local_instance ``` ### In the second project #### 1. Switch to the second project ```sh export OS_PROJECT_ID=def456ghi789jkl0mnopqr1234 ``` #### 2. List the project IDs ```sh openstack project list -c ID -f value ``` Example output: ```sh def456ghi789jkl0mnopqr1234 ``` #### 3. Create a port on the shared network ```sh openstack port create --network shared_private_network --fixed-ip subnet=shared_subnet_v2 shared_port ``` Example output: ```sh +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | id | f6446f46-ce57-47c4-b3bc-42fa28e7d4ff | | name | shared_port | | network_id | 3d2ee28e-88a9-46ff-b768-3bf6734b8742 | | fixed_ips | ip_address='10.0.3.12', subnet_id='441d0d65-2e1b-413c-ad28-2876f1c14025' | +-------------------------+--------------------------------------+ ``` #### 4. Create an instance on the shared network ```sh openstack server create --port f6446f46-ce57-47c4-b3bc-42fa28e7d4ff --security-group default --key-name my_key --flavor d2-2 --image "Ubuntu 22.04" pong_server ``` Example output: ```sh +--------------------------------------+-----------------------------------------------------+ | Field | Value | +--------------------------------------+-----------------------------------------------------+ | id | b8212ec4-5fff-4e31-8969-164ce33e7380 | | name | pong_server | | status | BUILD | +--------------------------------------+-----------------------------------------------------+ ``` ### Verify connectivity #### 1. Connect to the first instance ```sh ssh -i ~/.ssh/id_rsa ubuntu@ ``` #### 2. Ping the second instance from the first instance ```sh ping -c1 10.0.3.12 ``` Example output: ```sh PING 10.0.3.12 (10.0.3.12) 56(84) bytes of data. 64 bytes from 10.0.3.12: icmp_seq=1 ttl=64 time=0.292 ms --- 10.0.3.12 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.292/0.292/0.292/0.000 ms ``` ## Go further Join our [community of users](https://community.ovhcloud.com/).