In scenarios where IP addresses can change, such as with DHCP, you’ll need to configure plgd hub and plgd dps (Device Provisioning Service) using both a dynamic and a static IP address.
Configuring the System: To accommodate both dynamic and static IP addresses, follow these steps:
Add an Additional IP (Secondary IP) to the Ubuntu System. This can be achieved by referring to guides such as: How To Add Additional IP (Secondary IP) In Ubuntu System Ask Ubuntu - Does netplan support DHCP and static addresses on one interface?
Assign a static IP address, for example: 10.254.254.1/32
Update the /etc/hosts file with domains pointing to the static IP address:
10.254.254.1 demo.mycompany.com auth.demo.mycompany.com api.demo.mycompany.com
Installing and Configuring DNS Server:
Install a DNS server, such as dnsmasq, to serve domains to MicroK8s. Make this configuration permanent for reboots. Allow the server to listen on 10.254.254.1.
Configuring MicroK8s to Use Custom DNS:
Configure MicroK8s to utilize the custom DNS server with IP 10.254.254.1 by following the MicroK8s documentation for adding custom DNS as an add-on.
Updating Helm Values for PLGD Services:
Adjust the Helm values YAML for PLGD services to utilize the domain and the DHCP assigned IP address. Modify the values.yaml with the following settings:
global:
domain: demo.mycompany.com
coapgateway:
apis:
coap:
externalAddress: <DHCP_IP:PORT>
resourcedirectory:
publicConfiguration:
coapGateway: coaps+tcp://<DHCP_IP:PORT>
deviceProvisioningService:
enrollmentGroups:
- id:
hub:
coapGateway: <DHCP_IP:PORT>
Replace <DHCP_IP:PORT> with the actual DHCP-assigned IP address and port.
Sustaining IP Address Changes:
After changing the IP address, you only need to update the values.yaml in Helm for the changes to take effect. Then the coap-gateway, resource-directory, and device-provisioning-service pods will be restarted to load configuration.
Accessing the Services:
Ensure that any laptop attempting to access https://demo.mycompany.com has the updated /etc/hosts file pointing to the new DHCP-assigned IP address.
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