Update grafana/promtail Docker tag to v2.2.1

[renovate]

This PR contains the following updates:

Package	Update	Change
grafana/promtail	patch	2.2.0 -> 2.2.1
grafana/promtail	minor	2.1.0 -> 2.2.1

---

Release Notes

grafana/loki

v2.2.1

Compare Source

2.2.1 fixes several important bugs, it is recommended everyone running 2.2.0 upgrade to 2.2.1

2.2.1 also adds the labelallow pipeline stage in Promtail which lets an allowlist be created for what labels will be sent by Promtail to Loki.

• 3468 adityacs: Support labelallow stage in Promtail
• 3502 cyriltovena: Fixes a bug where unpack would mutate log line.
• 3540 cyriltovena: Support for single step metric query.
• 3550 cyriltovena: Fixes a bug in MatrixStepper when sharding queries.
• 3566 cyriltovena: Properly release the ticker in Loki client.
• 3573 cyriltovena: Fixes a race when using specific tenant and multi-client.

Installation:

The components of Loki are currently distributed in plain binary form and as Docker container images. Choose what fits your use-case best.

Docker container:

• https://hub.docker.com/r/grafana/loki
• https://hub.docker.com/r/grafana/promtail

$ docker pull "grafana/loki:2.2.1"
$ docker pull "grafana/promtail:2.2.1"

Binary

We provide pre-compiled binary executables for the most common operating systems and architectures.
Choose from the assets below for the application and architecture matching your system.
Example for Loki on the linux operating system and amd64 architecture:

$ curl -O -L "https://github.com/grafana/loki/releases/download/v2.2.1/loki-linux-amd64.zip"
### extract the binary
$ unzip "loki-linux-amd64.zip"
### make sure it is executable
$ chmod a+x "loki-linux-amd64"

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.