Continental Innovates with Rancher and Kubernetes
For development and testing environments that have a special requirement to terminate TLS/SSL at a load balancer instead of your Rancher Server container, deploy Rancher and configure a load balancer to work with it conjunction.
A layer-7 load balancer can be beneficial if you want to centralize your TLS termination in your infrastructure. Layer-7 load balancing also offers the capability for your load balancer to make decisions based on HTTP attributes such as cookies, etc. that a layer-4 load balancer is not able to concern itself with.
This install procedure walks you through deployment of Rancher using a single container, and then provides a sample configuration for a layer-7 NGINX load balancer.
Want to skip the external load balancer? See Docker Installation instead.
Make sure that your node fulfills the general installation requirements.
Provision a single Linux host according to our Requirements to launch your Rancher Server.
For security purposes, SSL (Secure Sockets Layer) is required when using Rancher. SSL secures all Rancher network communication, like when you login or interact with a cluster.
Do you want to… Complete an Air Gap Installation? Record all transactions with the Rancher API? See Advanced Options below before continuing.
Do you want to…
See Advanced Options below before continuing.
Choose from the following options:
If you elect to use a self-signed certificate to encrypt communication, you must install the certificate on your load balancer (which you’ll do later) and your Rancher container. Run the Docker command to deploy Rancher, pointing it toward your certificate.
Prerequisites: Create a self-signed certificate. The certificate files must be in PEM format.
Prerequisites: Create a self-signed certificate.
To Install Rancher Using a Self-Signed Cert:
docker run -d --restart=unless-stopped \ -p 80:80 -p 443:443 \ -v /etc/your_certificate_directory/cacerts.pem:/etc/rancher/ssl/cacerts.pem \ rancher/rancher:latest
If your cluster is public facing, it’s best to use a certificate signed by a recognized CA.
Prerequisites: The certificate files must be in PEM format.
Prerequisites:
To Install Rancher Using a Cert Signed by a Recognized CA:
If you use a certificate signed by a recognized CA, installing your certificate in the Rancher container isn’t necessary. We do have to make sure there is no default CA certificate generated and stored, you can do this by passing the --no-cacerts parameter to the container.
--no-cacerts
Enter the following command.
``` docker run -d --restart=unless-stopped \ -p 80:80 -p 443:443 \ rancher/rancher:latest --no-cacerts ```
When using a load balancer in front of your Rancher container, there’s no need for the container to redirect port communication from port 80 or port 443. By passing the header X-Forwarded-Proto: https header, this redirect is disabled.
X-Forwarded-Proto: https
The load balancer or proxy has to be configured to support the following:
Passing / setting the following headers:
Host
X-Forwarded-Proto
https
rancher/rancher
X-Forwarded-Port
X-Forwarded-For
This NGINX configuration is tested on NGINX 1.14.
Note: This NGINX configuration is only an example and may not suit your environment. For complete documentation, see NGINX Load Balancing - HTTP Load Balancing.
rancher-server
FQDN
/certs/fullchain.pem
/certs/privkey.pem
worker_processes 4; worker_rlimit_nofile 40000; events { worker_connections 8192; } http { upstream rancher { server rancher-server:80; } map $http_upgrade $connection_upgrade { default Upgrade; '' close; } server { listen 443 ssl http2; server_name FQDN; ssl_certificate /certs/fullchain.pem; ssl_certificate_key /certs/privkey.pem; location / { proxy_set_header Host $host; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header X-Forwarded-Port $server_port; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://rancher; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; # This allows the ability for the execute shell window to remain open for up to 15 minutes. Without this parameter, the default is 1 minute and will automatically close. proxy_read_timeout 900s; proxy_buffering off; } } server { listen 80; server_name FQDN; return 301 https://$server_name$request_uri; } }
For help troubleshooting certificates, see this section.
If you want to record all transactions with the Rancher API, enable the API Auditing feature by adding the flags below into your install command.
-e AUDIT_LEVEL=1 \ -e AUDIT_LOG_PATH=/var/log/auditlog/rancher-api-audit.log \ -e AUDIT_LOG_MAXAGE=20 \ -e AUDIT_LOG_MAXBACKUP=20 \ -e AUDIT_LOG_MAXSIZE=100 \
If you are visiting this page to complete an Air Gap Installation, you must pre-pend your private registry URL to the server tag when running the installation command in the option that you choose. Add <REGISTRY.DOMAIN.COM:PORT> with your private registry URL in front of rancher/rancher:latest.
<REGISTRY.DOMAIN.COM:PORT>
rancher/rancher:latest
Example:
<REGISTRY.DOMAIN.COM:PORT>/rancher/rancher:latest
Rancher uses etcd as a datastore. When Rancher is installed with Docker, the embedded etcd is being used. The persistent data is at the following path in the container: /var/lib/rancher.
/var/lib/rancher
You can bind mount a host volume to this location to preserve data on the host it is running on:
docker run -d --restart=unless-stopped \ -p 80:80 -p 443:443 \ -v /opt/rancher:/var/lib/rancher \ --privileged \ rancher/rancher:latest
As of Rancher v2.5, privileged access is required.
This layer 7 NGINX configuration is tested on NGINX version 1.13 (mainline) and 1.14 (stable).
Note: This NGINX configuration is only an example and may not suit your environment. For complete documentation, see NGINX Load Balancing - TCP and UDP Load Balancer.
upstream rancher { server rancher-server:80; } map $http_upgrade $connection_upgrade { default Upgrade; '' close; } server { listen 443 ssl http2; server_name rancher.yourdomain.com; ssl_certificate /etc/your_certificate_directory/fullchain.pem; ssl_certificate_key /etc/your_certificate_directory/privkey.pem; location / { proxy_set_header Host $host; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header X-Forwarded-Port $server_port; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://rancher; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; # This allows the ability for the execute shell window to remain open for up to 15 minutes. Without this parameter, the default is 1 minute and will automatically close. proxy_read_timeout 900s; proxy_buffering off; } } server { listen 80; server_name rancher.yourdomain.com; return 301 https://$server_name$request_uri; }