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SETUP.md

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Docker Installation

Table of contents

  1. Downloading CT-Template
  2. Creating CT
  3. Post-Create
  4. Start the CT and Install Docker
  5. Installation preparation for Dockge
  6. Network for Docker (VLAN's)
  7. Configuring Trunks



1. Downloading CT-Template

I used Debian Bullseye as the base template because Proxmox was already running on it and
so you have the same operating system everywhere. To get the CT template, do the following.

  • Go to Local > CT Templates in the Proxmox WebUI
  • Click on the button Templates
  • Choose and downloaded "Debian-11-Standard"
    • Decription: Debian 11 Bullseye (standard)
  • Wait until it says “TASK OK” and close the window



2. Creating CT

Start by creating a new CT in proxmox WebUI.
Click on the Create CT button above and set the CT with the following values. I left all values that were not specified as they were or were not specified at the time of creation.

Note

Activate Advanced Mode at the bottom of the window


CT Settingvalues

  • General:

    • Node: proxmox
    • CT ID: 101
    • Name: Dockersoft
    • Password: defined a password I liked to use
    • confirm Password: confirm password
    • SSH public key: Select your just downloaded template

  • Template:

    • Storage: local
    • Template: Choose your

  • Disk:

    • Disk size: 350 GB (depends on the amount of docker container, you can go smaller and resize it later)

  • CPU:

    • Cores: 3-open (I assigned most of my cores to the CT because I plan to run most of the services as docker containers)

  • Memory:

    • RAM: 40 GB
    • SWAP: 6 GB

Note

You must enter this value in MiB, i.e. 40960 MiB for 40GB and 6144 MiB for 6 GB


  • Network:

    • Bridge: vmbr1 (VLAN-Network)
    • VLAN Tag: 101 (The same as my container ID)
    • IPv4: Static
    • IPv4/CIDR: 10.1.1.2/24
    • Gateway (IPv4): 10.1.1.1 (You have to create this VLAN in OPNSense look at the OPNSense Setup.md)

  • DNS:

    • DNS domain: /
    • DNS servers: 8.8.8.8

After creating the CT we will add the vlan network aswell. Now confirm the whole thing in the Confirm area and click on the finish button.



3. Post-Create

I also enabled Start at Boot in the Options of the CT.



4. Start the CT and Install Docker

At first create a new VLAN for this docker.
My Example ID is now: 101 Use the OPNsense documentation for this and access to the internet.

[!WARNING]> You need to make sure the container has access to the internet. You can test this by pinging ping 1.1.1.1 for example. Possibly you would have to turn the firewall back on.

To install docker into the CT you need to startup the container and login.
To do this we simply use the get Docker script.

  • Run apt update and apt upgrade
  • Run apt install curl -y to install curl

Now you can install docker.

curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh (Shows you the current installation status)

You can verify the installation with docker ps



5. Installation preparation for Dockge

Later we will install dockge as a container manager. To make things easier for later we can already create all files for dockge.
For example what I like to do is create /opt/stacks for dockge with mkdir /opt/stacks.

I also like to add it to my .bashrc with nano ~/.bashrc and adding cd /opt/stacks.



6. Network for Docker (VLAN's)

We will also need to setup a VLAN Trunk.
That way we can later seperate all docker containers into their VLAN's.
For that we will need to add a new Network in the Proxmox WebUI.

  • Go into your proxmoy WebUI via yourip:8006
  • Go to "Proxmox > Docker CT > Network"
  • Click on "Add" and choose "Network Device" to create a new network device

Network Device Settingvalues

  • Name: vlan0 (way the vlans will later be named vlan0.102 internally for example. The same as in OPNSense)
  • Bridge: vmbr1 (VLAN-Network)



7. Configuring Trunks

You will have to add a new trunk each time you want to connect a new VLAN to the Docker CT.
For that its simmelar to the OPNSense setup.
run the Commands in the proxmox-shell. You can edit the config with vim or nano.

cd /etc/pve/lxc
nano 101.conf

We will need to edit the line starting with net1: and add all your VLANS as trunks trunks=102;103;...
It should look like this after that

net1: name=vlan0,bridge=vmbr1,firewall=1,hwaddr=BC:24:11:1C:45:19,type=veth,trunks=102;103;104;110;111

I added 102-104 and 110, 111 for now, because I will need them for sure.

Caution

MAKE SURE TO ADD NEW VLANS TO TRUNKS WHEN NEEDING A NEW VLAN