Try Ubuntu Landscape on Xenial (by quqi99)

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Landscape is used for manage your Ubuntu Cluster remotely. You can install Landscape directly on a machine running Xenial (Ubuntu 16.04), this is called “Landscape On Premises.” It is free for up to 10 physical machines and 10 more virtual machines for a total of 20.

Install Landscape Server

; refer https://askubuntu.com/questions/549809/how-do-i-install-landscape-for-personal-usesudo ufw disablesudo add-apt-repository ppa:landscape/17.03sudo apt updatesudo apt install landscape-server-quickstart  ; register the landscape account using text based web brower, or visit 'https://<server-hostname>'sudo apt install links  links https://<server-hostname>

Register Landscape Clients

; now register ubuntu node; copy /etc/landscape/landscape_server.pem from landscape server to every ubuntu nodessudo nano /etc/landscape/client.conf  ssl_public_key = /etc/landscape/landscape_server.pemsudo apt install landscape-clientsudo landscape-config --computer-title "node2" --account-name standalone  --url https://xenial/message-system --ping-url http://xenial/ping --ok-no-register --silent; then accept this node in GUI page

Customized Installation for Landscape by Preseed

1, Prepare preseed.cfg and a customized script lds.sh

export DEBIAN_FRONTEND=noninteractiveapt-get install -y landscape-clientlandscape-client --daemon --pid-file /run/landscape.pidlandscape-config --computer-title "node2" --account-name standalone  --url https://xenial/message-system --ping-url http://xenial/ping --ok-no-register --silent --http-proxy PROXY-URL --https-proxy PROXY-URLkill $(cat /run/landscape.pid)

2, Use ‘python -m SimpleHTTPServer 8080’ to setup web server for them
3, After selecting language press F6 at installer welcome screen
4, Edit boot command and replace “file=/cdrom/preseed/ubuntu-server.seed” with “preseed/url=http://IP/preseed.cfg”
5, Press Enter and complete installation

Landscape start process

1, ubuntu-installer calls the following command to install landscape-client package [1] and [2].apt-install landscape-client || true2, landscape-client package continues to register client. *-proxy options will be writed to /etc/default/landscape-client# grep 'landscape-config' ./debian/landscape-client.postinst -A 11landscape-config --silent --ok-no-register \--computer-title "$COMPUTER_TITLE" \--account-name "$ACCOUNT_NAME" \--registration-key "$REGISTRATION_KEY" \--url "$URL" \--exchange-interval "$EXCHANGE_INTERVAL" \--urgent-exchange-interval "$URGENT_EXCHANGE_INTERVAL" \--ping-url "$PING_URL" \--ping-interval "$PING_INTERVAL" \--http-proxy "$HTTP_PROXY" \--https-proxy "$HTTPS_PROXY" \--tags "$TAGS"3, landscape-client package uses start-stop-daemon helper to start landscape-client daemon. But, installer's chroot will not allow to run start-stop-daemon [3], so we need to restart machine to do workaround.vim ./debian/landscape-client.initFULL_COMMAND="start-stop-daemon --start --quiet --oknodo --startas $DAEMON --pidfile $PIDFILE -g $DAEMON_GROUP -- --daemon --pid-file $PIDFILE"[1] http://bazaar.launchpad.net/~ubuntu-core-dev/pkgsel/ubuntu/revision/115[2] http://bazaar.launchpad.net/~ubuntu-core-dev/pkgsel/ubuntu/view/head:/debian/postinst#L197[3] https://github.com/linuxmint/ubiquity/blob/master/d-i/source/debian-installer-utils/chroot-setup.sh#L72

Appendix - How to Create Certificate

; above /etc/landscape/landscape_server.pem is created automatically by landscape-server-quickstart, you can also do it by hand.; create your own CA (Certificate Authority), then we will have ./demoCA/private/cakey.pem; refer https://help.landscape.canonical.com/LDS/SSL/usr/lib/ssl/misc/CA.pl -newca; generate an SSL certificate signed by your new CA, then we will have newkey.pem/usr/lib/ssl/misc/CA.pl -newreq-nodes; sign your newly created SSL certificate with your newly created CA, then we will have newcert.pem/usr/lib/ssl/misc/CA.pl -signreq; install the files to Landscapesudo mv newcert.pem /etc/ssl/certs/landscape.pemsudo mv newkey.pem /etc/ssl/private/landscape.keysudo cp demoCA/cacert.pem /etc/ssl/certs/landscape_server_ca.crt; make Landscape Clients trust the newly created CAcopy /etc/ssl/certs/landscape_server_ca.crt from the LDS server to the client's directory /usr/local/share/ca-certificates/ and run 'sudo update-ca-certificates'.; adding the certificate file to /etc/landscape/client.confssl_public_key = /usr/local/share/ca-certificates/landscape_server_ca.crt