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talos/docs/website/content/v0.3/en/customization/containerd.md
Spencer Smith e0181c85eb feat: allow ability to customize containerd 
This PR will allow for any toml files added into `/var/cri/conf.d` to be
picked up and parsed as a containerd config. This should allow users a
nice way to add additional configs by passing extra files in machine
config like:

```
machine:
  ...
  files:
    - content: |
        [metrics]
          address = "0.0.0.0:11234"
      path: /var/cri/conf.d/metrics.toml
      op: create
```

Will close #1718.

Signed-off-by: Spencer Smith <robertspencersmith@gmail.com>
2020-01-22 17:08:10 -05:00

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title
title
Customizing containerd

We offer the ability to use custom configuration files for containerd. The base containerd configuration expects to merge in any additional configs present in /var/cri/conf.d/*.toml.

An example of exposing metrics

Into each machine config, add the following:

machine:
  ...
  files:
    - content: |
        [metrics]
          address = "0.0.0.0:11234"
      path: /var/cri/conf.d/metrics.toml
      op: create

Create cluster like normal and see that metrics are now present on this port:

$ curl 127.0.0.1:11234/v1/metrics
# HELP container_blkio_io_service_bytes_recursive_bytes The blkio io service bytes recursive
# TYPE container_blkio_io_service_bytes_recursive_bytes gauge
container_blkio_io_service_bytes_recursive_bytes{container_id="0677d73196f5f4be1d408aab1c4125cf9e6c458a4bea39e590ac779709ffbe14",device="/dev/dm-0",major="253",minor="0",namespace="k8s.io",op="Async"} 0
container_blkio_io_service_bytes_recursive_bytes{container_id="0677d73196f5f4be1d408aab1c4125cf9e6c458a4bea39e590ac779709ffbe14",device="/dev/dm-0",major="253",minor="0",namespace="k8s.io",op="Discard"} 0
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