Configure proxy o main host

1) Connect to CLI, using resadmin user

2) Run command

sudo resutil configset -key proxyhost -s <ip address>
sudo resutil configset -key proxyport -i <port>

3) Edit file /etc/systemd/system/k3s.service.env

and set

HTTP_PROXY=http://proxy.corp.com:8080 
HTTPS_PROXY=http://proxy.corp.com:8080 
NO_PROXY=localhost,127.0.0.1,localaddress,corp.com,10.0.0.0/8

sudo systemctl restart k3s

Configure proxy on app host

manageAppHost proxy --https-proxy-url http://<ip address>
manageAppHost proxy --http-proxy-url http://<ip address>