This is an example of deploying a docker swarm on localhost to host personal Serverless Functions using OpenFaaS.
Each machine is set up with a vagrant user that is added to the docker group.
To set up these machines you will need to install VirtualBox and Vagrant.
After that, download/clone this repository and run vagrant up from this
directory to install the machines. Next, type vagrant ssh <MACHINE_NAME>
to access the machines command line.
Default Machines
- start1 - IP 192.168.100.71
- start2 - IP 192.168.100.72
- start3 - IP 192.168.100.73
We will need to set up the swarm before installing OpenFaaS. If this was done on start1 then the command will be:
docker swarm init --advertise-addr=192.168.100.71
docker swarm join-token manager
Copy the command output of the second command and run it in the other machines.
exit
vagrant ssh start2
<COPIED COMMAND WITH TOKEN>
exit
vagrant ssh start3
<SAME COPIED COMMAND WITH TOKEN>
Now return to whichever machine will be your main machine, enter the shared directory and run the launch_faas.sh script to download and startup OpenFaaS.
cd /shared
sh launch_faas.sh
Now navigate your browser to 192.168.100.71:8080 to see the default FaaS UI.
We have installed the faas-cli so we can use that to make our own hello world function.
Inside the VM make sure you are in the shared folder. We will create a node function running on an alpine container in docker. The first command will generate boilerplate files for us. We then need to change the .yml file with an IP address of one of our VM's
faas-cli new callme --lang node
// Use vim or a Code Editor to change localhost to 192.168.100.71
faas-cli build -f callme.yml
faas-cli deploy -f callme.yml
To remove a function:
faas-cli rm -f callme.yml
OpenFaaS comes with some example containers built in. One of these is a UI to see the functions that are deployed and will allow you to manually invoke the functions. On your machine you can visit http://192.168.100.71:8080/ui/ to see the default functions.