0.15 Upgrade Guide

Vector's 0.15.0 release includes a few minor breaking changes:

1. Dropping support for Kubernetes 1.14.X.
2. The sample transform now takes VRL conditions by default.
3. The remap condition type was renamed to vrl.

We cover each below to help you upgrade quickly:

Upgrade Guide

Dropping support for Kubernetes 1.14 {#first}

We've dropped support for Kubernetes version 1.14 as it is no longer a supported Kubernetes version nor do major cloud providers support it.

This version of Kubernetes is likely to still work with Vector, but we will no longer be testing against it and cannot guarantee future versions of Vector will be compatible.

In general, we will aim to match Kubernetes' supported releases and along with the versions supported by major cloud providers.

The sample transform now takes VRL conditions by default {#second}

In version 0.12.0 we switched to using VRL as the default condition type for our transforms that take conditions (like filter and route), but the sample transform was not updated even though its documentation was. This release brings the sample transform in line with the others by making VRL the default condition type.

This means, if you are presently using the deprecated check_fields syntax, you will need to add type = "check_fields" to your condition.

For example, if you previously had:

transforms:
  sample:
    type: "sample"
    inputs: ["in"]
    rate: 10
    key_field: "message"
    exclude:
      "message.contains": "error"

You will need to add exclude.type = "check_fields" like:

transforms:
  sample:
    type: "sample"
    inputs: ["in"]
    rate: 10
    key_field: "message"
    exclude:
      "type": "check_fields"
      "message.contains": "error"

To convert this to the new VRL conditions, you would write:

transforms:
  sample:
    type: "sample"
    inputs: ["in"]
    rate: 10
    key_field: "message"
    exclude: |
      contains!(.message, "error")

We recommend upgrading to the VRL conditions as these are much more powerful than the legacy check_fields-style conditions.

The remap condition type was renamed to vrl {#third}

The remap condition type has been renamed vrl in this release to better highlight that the syntax for it is a VRL program. Most examples of using this condition type have the short-hand condition config of just specifying the VRL program without specifying a type. For example:

transforms:
  filter_a:
    inputs: ["stdin"]
    type: "filter"
    condition: |
      message = if exists(.tags) { .tags.message } else { .message }
      message == "test filter 1"

Which is automatically a VRL condition. However, if you were specifying the type like:

transforms:
  filter_a:
    inputs: ["stdin"]
    type: "filter"
    condition:
      type: "remap"
      source: |
        message = if exists(.tags) { .tags.message } else { .message }
        message == "test filter 1"

Then you will need to update type = "remap" to type = "vrl" like:

transforms:
  filter_a:
    inputs: ["stdin"]
    type: "filter"
    condition:
      type: "vrl"
      source: |
        message = if exists(.tags) { .tags.message } else { .message }
        message == "test filter 1"