themoriarti / talm

Manage Talos Linux the GitOps Way!

Talm

Manage Talos the GitOps Way!

Talm is just like Helm, but for Talos Linux

Features

While developing Talm, we aimed to achieve the following goals:

• Automatic Discovery: In a bare-metal environment, each server may vary slightly in aspects such as disks and network interfaces. Talm enables discovery of node information, which is then used to generate patches.

• Ease of Customization: You can customize templates to create your unique configuration based on your environment. The templates use the standard Go templates syntax, enhanced with widely-known Helm templating logic.

• GitOps Friendly: The patches generated do not contain sensitive data, allowing them to be stored in Git in an unencrypted, open format. For scenarios requiring complete configurations, the --full option allows the obtain a complete config that can be used for matchbox and other solutions.

• Simplicity of Use: You no longer need to pass connection options for each specific server; they are saved along with the templating results into a separate file. This allows you to easily apply one or multiple files in batch using a syntax similar to kubectl apply -f node1.yaml -f node2.yaml.

• Compatibility with talosctl: We strive to maintain compatibility with the upstream project in patches and configurations. The configurations you obtain can be used with the official tools like talosctl and Omni.

Installation

Download binary from Github releases page

chmod +x ./talm-linux-amd64
sudo mv talm-linux-amd64 /usr/local/bin/talm

Getting Started

Create new project

mkdir newcluster
cd newcluster
talm init
mkdir nodes

Boot Talos Linux node, let's say it has address 1.2.3.4

Gather node information:

talm -n 1.2.3.4 -e 1.2.3.4 template -t templates/controlplane.yaml -i > nodes/node1.yaml

Edit nodes/node1.yaml file:

# talm: nodes=["1.2.3.4"], endpoints=["1.2.3.4"], templates=["templates/controlplane.yaml"]
machine:
    network:
        # -- Discovered interfaces:
        # enx9c6b0047066c:
        #   name: enp193s0f0
        #   mac:9c:6b:00:47:06:6c
        #   bus:0000:c1:00.0
        #   driver:bnxt_en
        #   vendor: Broadcom Inc. and subsidiaries
        #   product: BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller)
        # enx9c6b0047066d:
        #   name: enp193s0f1
        #   mac:9c:6b:00:47:06:6d
        #   bus:0000:c1:00.1
        #   driver:bnxt_en
        #   vendor: Broadcom Inc. and subsidiaries
        #   product: BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller)
        interfaces:
            - interface: enx9c6b0047066c
              addresses:
                - 1.2.3.4/26
              routes:
                - network: 0.0.0.0/0
                  gateway: 1.2.3.1
        nameservers:
            - 8.8.8.8
            - 8.8.4.4
    install:
        # -- Discovered disks:
        # /dev/nvme0n1:
        #    model: SAMSUNG MZQL21T9HCJR-00A07
        #    serial: S64GNE0RB00153
        #    wwid: eui.3634473052b001530025384500000001
        #    size: 1.75 TB
        # /dev/nvme1n1:
        #    model: SAMSUNG MZQL21T9HCJR-00A07
        #    serial: S64GNE0R811820
        #    wwid: eui.36344730528118200025384500000001
        #    size: 1.75 TB
        disk: /dev/nvme0n1
    type: controlplane
cluster:
    clusterName: talm
    controlPlane:
        endpoint: https://192.168.0.1:6443

Apply config:

talm apply -f nodes/node1.yaml -i

Upgrade node:

talm upgrade -f nodes/node1.yaml

Show diff:

talm apply -f nodes/node1.yaml --dry-run

Re-template and update generated file in place (this will overwrite it):

talm template -f nodes/node1.yaml -I

Using talosctl commands

Talm offers a similar set of commands to those provided by talosctl. However, you can specify the --file option for them.

For example, to run a dashboard for three nodes:

talm dashboard -f node1.yaml -f node2.yaml -f node3.yaml

Customization

You're free to edit template files in ./templates directory.

All the Helm and Sprig functions are supported, including lookup for talos resources!

Lookup function example:

{{ lookup "nodeaddresses" "network" "default" }}

- is equiualent to:

talosctl get nodeaddresses --namespace=network default

Querying disks map example:

{{ range .Disks }}{{ if .system_disk }}{{ .device_name }}{{ end }}{{ end }}

- will return the system disk device name

Encryption

Currently, Talm does not have built-in encryption support, but you can transparently encrypt your secrets using the git-crypt extension.

Example .gitattributes file:

kubeconfig filter=git-crypt diff=git-crypt
secrets.yaml filter=git-crypt diff=git-crypt
talosconfig filter=git-crypt diff=git-crypt
.gitattributes !filter !diff