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This guide covers prerequisites, a standalone installation, Compose, TLS choices, firewall exposure, updates, Agent compatibility, and why Docker Swarm is a separate deployment path.
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What Portainer does on a VPS
Portainer Server is a web-based management layer that runs in Docker. It connects to the local Docker engine through the Unix socket and gives you a browser interface for containers, images, volumes, networks, stacks, and related engine resources. On a single VPS, the normal design is one Portainer Server container connected to that VPS’s local Docker engine.
Portainer can also manage remote or Edge environments through Agents. Those environments add networking and compatibility considerations that do not apply to a basic, single-host installation. Start with the standalone deployment unless the VPS is intentionally part of a Docker Swarm cluster.
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The persistent state is in Portainer’s /data directory. Mounting the named volume portainer_data at that path preserves Portainer’s database and configuration when the container is recreated for an upgrade or recovery.
Prerequisites and host checks
A working Docker engine
The official Linux procedure requires the latest version of Docker installed and working. Check it before installing Portainer:
docker version
docker infoBoth commands should return normally. If Docker is stopped, inaccessible, or only partially installed, fix that first; Portainer cannot manage an engine it cannot reach.
Sudo access and the Docker socket
You need sudo access on the VPS. The standard container connects to /var/run/docker.sock, the Unix socket used by a rootful Docker engine. The installation command therefore mounts that socket read/write into the container. Treat access to the socket as administrative access to Docker: anyone who can control Portainer should be considered able to control containers and data on the host.
SELinux and rootless Docker limitations
The documented setup assumes Docker runs as root and that SELinux is disabled unless the Portainer container is run privileged. Rootless Docker has limitations with this arrangement. If your VPS uses rootless mode or enforcing SELinux, validate the required socket permissions and security policy before relying on the standard command; do not assume the rootful instructions will behave identically.
DNS, firewall and administrative access
Decide whether you will initially connect by VPS address or by a DNS name. Ensure your firewall policy allows the endpoint you choose, while keeping Docker’s own daemon and socket private. The basic command publishes Portainer’s application ports; cloud firewall rules, host firewall rules, DNS records, and any reverse proxy remain your responsibility.
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These are different topologies, not two commands for the same installation. Use the standalone method for one VPS running one Docker engine. Use the Swarm method only when the host is a deliberately configured Swarm manager in a cluster.
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| Aspect | Standalone VPS | Docker Swarm |
|---|---|---|
| Topology | One host and its local Docker engine | Cluster with manager and worker nodes |
| Deployment command | docker run or Docker Compose |
docker stack deploy using a stack manifest |
| Port requirement highlighted by the guide | 9443 for the UI; 8000 is optional for Edge tunnel features | Manager-worker communication on port 9001, in addition to the services used by the cluster |
| Agent placement | One local Server container; remote Agents only when you add remote environments | One Portainer Server and a global Agent service across the cluster |
| Operational complexity | Lowest; suitable for a single VPS | Higher; requires Swarm mode, manager administration and cluster networking |
A single VPS does not gain anything from deploying the Swarm stack merely because Portainer supports Swarm. Swarm introduces cluster state and communication requirements; it is appropriate when you already operate a multi-node Swarm or have a specific reason to orchestrate services that way.
Portainer’s ports and what each one means
| Port | Purpose | Required for a basic local installation? |
|---|---|---|
9443 |
HTTPS web interface for Portainer Server | Yes |
8000 |
TCP tunnel server used by Edge Agent tunnel features | No, unless you use those Edge features |
9000 |
Legacy HTTP interface that can still be enabled for compatibility | No |
9001 |
Manager-worker communication in the documented Swarm deployment | No for standalone Docker |
Portainer’s current default is HTTPS on 9443. Port 8000 is not a second web interface and is not needed to manage containers on the same VPS. Port 9000 is a legacy HTTP option, not the preferred endpoint for a new installation. Port 9001 belongs to the Swarm deployment’s cluster communication requirements, not to a normal one-host setup.
Install Portainer CE with Docker
1. Create persistent storage
Create the named volume before starting the container:
docker volume create portainer_dataDocker stores the volume independently of the Portainer container. Do not replace this mount with an unplanned temporary directory if you want upgrades and redeployments to retain Portainer’s database.
2. Start the Portainer CE container
The official standalone command publishes the HTTPS UI and the optional Edge tunnel, mounts the Docker socket, mounts persistent data, and configures automatic restart:
docker run -d
-p 8000:8000
-p 9443:9443
--name portainer
--restart=always
-v /var/run/docker.sock:/var/run/docker.sock
-v portainer_data:/data
portainer/portainer-ce:stsThe portainer/portainer-ce:sts image tag in this command selects Portainer CE’s short-term-support stream. Keep the command or Compose file you used; the image tag, published ports, socket mount and data volume must be reproduced when you recreate the container.
3. Confirm that Docker started it
docker psYou should see a running container named portainer. If it is absent, inspect the container’s output:
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docker ps -a
docker logs portainerCommon causes of an immediate exit include a Docker engine that is not running, a port already occupied by another service, an inaccessible socket, or a security policy blocking the mount.
Use Docker Compose instead
Compose is useful when you want the deployment represented as a file that can be reviewed and recreated. Download Portainer’s official CE Compose file and start it:
curl -L https://downloads.portainer.io/ce-sts/portainer-compose.yaml -o portainer-compose.yaml
docker compose -f portainer-compose.yaml up -dThe supplied Compose definition maps 9443:9443, can map 8000:8000, mounts /var/run/docker.sock, and uses the named portainer_data volume. Before running it, read the file and confirm that its volume and port mappings match the exposure you intend. If you do not use Edge tunnel features, avoid publishing an unnecessary 8000 mapping.
Run Compose from a directory you protect as an administrative deployment directory. Keep the file available for later upgrades so you can compare changes rather than accidentally recreating Portainer with a different volume or port configuration.
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Use the VPS address, not localhost
From your own computer, browse to:
https://<server-ip-or-fqdn>:9443Replace the placeholder with the VPS’s reachable IP address or DNS name. A documentation example using localhost applies only when the browser is running on the Docker host itself; it is not the address to type when Portainer is on a remote VPS.
Understand the certificate warning
By default, Portainer generates a self-signed SSL certificate for port 9443. A browser therefore warns that the certificate is not trusted by the normal public certificate authorities. On a first, controlled setup, verify that you reached the correct VPS and proceed only if the connection is expected. Do not treat the warning as proof that the endpoint is safe.
Create the initial administrator
Complete Portainer’s first-run setup in the browser and choose strong credentials. Because the account controls Docker resources, protect it like a server administrator account. The self-signed certificate can later be replaced with a certificate you provide during installation or configure through Portainer’s interface.
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Choose a practical HTTPS exposure model
| Model | Certificate ownership | Firewall exposure | Hostname experience |
|---|---|---|---|
| Direct access to 9443 | Portainer initially uses its generated self-signed certificate; you can provide a personal certificate during installation or through the UI | 9443 must be reachable from the administrator’s network | Uses the VPS address or a DNS name with an explicit :9443 port |
| DNS and reverse proxy in front | The proxy can own the public certificate while forwarding to Portainer’s HTTPS service | Expose the proxy’s public HTTPS endpoint and restrict direct access to 9443 according to your policy | Can present a normal HTTPS hostname without an explicit nonstandard port |
A reverse proxy is a deployment choice outside the basic Portainer container command. If you use one, configure DNS to point at the proxy, issue and renew the certificate there, and ensure the proxy can reach Portainer on the private network path you selected. If you connect directly, keep 9443 protected by your VPS and cloud firewall rules and use a DNS name if you want a stable address.
Do not publish port 9000 just to avoid the certificate warning. It is an HTTP compatibility option, whereas 9443 is the HTTPS endpoint enabled by default since CE 2.9 and BE 2.10.
Verify connectivity and diagnose failures
The page does not load
- Run
docker psand confirm that theportainercontainer is running. - Check
docker logs portainerfor startup errors. - Confirm that the VPS firewall and any cloud security group permit 9443 from your administration network.
- Check for a port conflict with
ssor the host’s service manager if Docker reports that binding 9443 failed. - Use the VPS IP directly to separate DNS problems from Portainer problems.
The browser shows a certificate error
That is expected with the generated self-signed certificate. Verify the address and VPS identity, then either continue for a controlled administrative connection or install a trusted certificate through your chosen certificate and proxy arrangement.
Port 8000 appears closed
That does not indicate a failed local installation. Port 8000 serves the TCP tunnel used by Edge Agent features. Local management through the VPS’s Docker socket works without it. Only publish and permit 8000 when your Edge design requires the tunnel.
Portainer cannot see Docker resources
Check that the container was started with -v /var/run/docker.sock:/var/run/docker.sock and that the socket exists on the host. Rootless Docker and SELinux policies can change the permissions and confinement assumptions of the standard command. Correct those host-level conditions rather than recreating the container repeatedly.
Update Portainer without losing stacks
Stacks and Portainer’s configuration depend on the data in portainer_data. Recreating the container is safe only when the replacement mounts that same volume at /data.
Before changing the image
- Record the current deployment: image tag, published ports, restart policy, socket mount, data volume and any Compose file.
- Read the release notes and check the replacement image you intend to use.
- Test the upgrade path on a non-critical system first. Portainer recommends this because releases can change behavior while adding features and fixes.
- Back up Portainer’s configuration before updating when your edition provides backup and restore support, and separately protect any application data stored in the Docker volumes managed through Portainer.
- Plan a maintenance window and make sure you can reach the VPS through an independent administrative channel if the web UI is temporarily unavailable.
Recreate a standalone container while retaining data
For a Docker-run installation, pull the replacement image, stop the current container, remove only the container, and run the replacement with the same volume and required mappings:
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docker pull portainer/portainer-ce:sts
docker stop portainer
docker rm portainer
docker run -d
-p 8000:8000
-p 9443:9443
--name portainer
--restart=always
-v /var/run/docker.sock:/var/run/docker.sock
-v portainer_data:/data
portainer/portainer-ce:stsDo not delete the portainer_data volume during this process. Removing the container is different from removing its named volume; the latter discards the persistent Portainer database.
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Keep the same Compose file and volume declaration, update the image reference as directed by the release documentation, then recreate the service with Compose. Confirm that the resulting service still mounts portainer_data:/data and publishes the ports you actually need. Inspect the service status and logs before signing in.
Update Agents after the Server
When you manage remote or Edge environments, update the Portainer Server first and the Agents afterward. Portainer specifically recommends this order because Agent compatibility can be affected by release changes. After each Agent update, confirm that the environment reconnects and that the expected Docker resources remain visible.
When Edge Agents and port 8000 are relevant
Agents are separate from the local socket connection used by a standalone VPS. They are useful when Portainer Server manages remote or Edge environments. The 8000 mapping in the standard command exposes Portainer’s TCP tunnel server for Edge tunnel features; it does not replace the local Docker socket and does not make ordinary local management more secure.
If your design includes Edge devices, document which systems initiate connections, which firewall directions are permitted, and whether a reverse proxy or network boundary sits in front of Portainer. Test an Agent connection after Server upgrades, then update Agents in the recommended order.
Deploying Portainer on Docker Swarm
Use the Swarm guide only after the VPS is part of a configured Docker Swarm. The documented path requires Swarm mode, a manager node, manager-worker communication on port 9001, downloading a stack manifest, and running docker stack deploy. It deploys one Portainer Server and a global Agent service across the cluster.
This model changes where services run and how they are administered. A Swarm manager must be able to communicate with workers, and firewall rules must allow the cluster’s required traffic. A lone VPS that is not intentionally operating a cluster should use the standalone Docker command or Compose instead; installing the Swarm stack adds complexity without solving a single-host requirement.
Operational checklist for a hosted VPS
- Docker is installed, running and reachable with the permissions used by the deployment.
- The
portainer_datavolume exists and is mounted at/data. - The Docker socket mount is present when using local-engine management.
- Port 9443 is reachable only from the networks that need administrative access.
- Port 8000 is published only when Edge tunnel features require it.
- Port 9000 remains disabled unless a documented legacy integration needs HTTP.
- The self-signed certificate warning is understood, or a trusted certificate is configured.
- The exact deployment file and image tag are recorded for recovery.
- Backups and a tested restore path exist before upgrades on important systems.
- Portainer Server upgrades are tested before production and are completed before Agent upgrades.
- Swarm is used only when the VPS belongs to an intentionally managed cluster.
Bottom line
For one VPS, create portainer_data, run Portainer CE against the local Docker socket, publish HTTPS on 9443, and browse to the VPS address with that port. Keep the data volume whenever you recreate the container. Add port 8000 only for Edge tunnel requirements, use a trusted certificate or reverse proxy when the service is internet-facing, and reserve the Swarm procedure for an actual multi-node Swarm.
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