Feature idea summary

Cgroups plugin supports only proportional and max Block IO policies. We should support BFQ scheduler as well. Disk stats for the scheduler are in blkio.bfq.io_service_bytes and blkio.bfq.io_serviced files.

When using right Y-axis, the first (rightmost) legend label is hard to click. Only a small fraction on the left side of the label is actually clickable. Almost impossible to hit on touch devices.

I assume this is due to the negative margin of the parent item (<div class="view" ...>)

![recording](https://user-images.githubusercontent.com/12658837/93191834-46273480-f745-11ea-8eb8-3c9921a5b

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• [√ ] Question or discussion
• Bug
• Requirement
• Feature or performance improvement

Question

• What do you want to know?
  Is there no support for python websocket

Bug

• Which version of SkyWalking, OS, and JRE?

• Which company or project?

• What happened?

https://github.com/heptiolabs/healthcheck

This will give us metric on healtcheck and more granularity on checks we want to have.

/cc @slim-bean @joe-elliott

This is a reminder for me or a task if anyone wants :P

Basically, The last two questions aren't really regex's questions.

To do:

• Move said questions to correct place.
• Add new regex questions (Python related!)?
• Maybe add a new ## Regex section, as it is a valuable skill

postcss before v8.2.10 (used by the React UI) is affected by CVE-2021-23368 (see https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23368)

Output from npm list postcss:

+-- react-scripts@3.4.4
| +-- css-loader@3.4.2
| | +-- icss-utils@4.1.1
| | | `-- postcss@7.0.35  deduped
| | +-- postcss@7.0.35
| | +-- postcss-modules-extract-imports@2.0.0
| | | `-- postcss@7.0.35  dedupe

What happened?

After being fine for a couple days, Prometheus mysteriously started crashing with this error:

level=error ts=2020-09-02T15:16:55.096Z caller=query_logger.go:87 component=activeQueryTracker msg="Error opening query log file" file=/prometheus/queries.active err="open /prometheus/queries.active: permission denied"
panic: Unable to create mmap-ed active query log

goro

Is your feature request related to a problem? Please describe.
It's very easy to see ingester and ha ring status, but distributor ring status is only sort of viewable via Consul

Describe the solution you'd like
A status page that shows the distributor ring status similar to how we can currently view ingester ring status.

Describe alternatives you've considered
Currently I ta

What is missing?
kube-prometheus ships by default grafana, but there are no alerts around it. Since upstream project has a monitoring mixin we may as well use it.

Why do we need it?
To provide alerts/dashboards for grafana OOTB.

What did you expect to see?

I'm expecting to be able to filter out the requests from blackbox exporter in my access logs.
So, please, add a user agent header that container the "blackbox exporter" string somewhere.

What did you see instead?

I see User-Agent: Go-http-client/1.1
Not easy to filter in the access logs...

It would be awesome if the metrics could include the node's topology.kubernetes.io/region & topology.kubernetes.io/zone (not sure what the non-AWS fields are called). That would help quickly identify patterns in the results. e.g., zone "a" is slower than zone "b" or that cross-zone traffic is what's causing a large spike in response times. Not sure if this is possible within the framework of this