Bump prometheus-client from 2.1.0 to 4.2.1

[dependabot]

Bumps prometheus-client from 2.1.0 to 4.2.1.

Release notes

Sourced from prometheus-client's releases.

v4.2.1

4.2.1 / 2023-08-04

Codename: If a bug falls in the forest

Bug fixes

• #291 Handle / in job name in Prometheus::Client::Push: Previously, if you included a / in your job name when using the Pushgateway client, you'd get a 400 error back as we didn't encode it properly. We now base64 encode it per the Pushgateway spec.

  It's possible that nobody has hit this bug (/ is fairly unlikely to appear in a job name) or that the error message (a 400 from Pushgateway with a complaint about an odd number of path components) didn't make it look like a bug in the Ruby client. Either way, this hopefully brings us fully in line with the spec!

v4.2.0

4.2.0 / 2023-07-25

Codename: Funny number

Small improvements

• #287 Add Gauge#set_to_current_time: Does what you'd expect - sets a gauge to the current unix epoch timestamp (including fractional seconds).

  Other client libraries have this and it's about time we did!

v4.1.0

4.1.0 / 2023-03-20

Codename: They finally made a point release

Small improvements

• #264 Add JRuby 9.3 to build matrix: JRuby 9.3 was released, and added as an officially supported version

• #273 Add Ruby 3.2 to build matrix: Ruby 3.2 was released, and added as an officially supported version

• #280 Optimize incrementing values in DirectFileStore adapter: There were some expensive method calls being made multiple times when they didn't need to be for simple increments. This PR introduces a specialised implementation for that case.

• #277 Allow use of instance and job labels: It's now possible to set the instance and job labels on metrics, where previously they had been reserved.

  The reason we'd reserved them is that Prometheus automatically generates values for them when it scrapes a target, and we didn't want to cause a collision. It turns out Prometheus handles that collision just fine.

  By default, Prometheus server will prepend exported_ to them if they're present in the scraped data (i.e. exported_instance and exported_job). Users can set honor_labels in their Prometheus server config if they prefer the labels from the scraped metric data to take precedence over the labels generated by the server.

Bug fixes

• #268 Use lowercase response headers in Rack example: Rack 3.0.0 started requiring this for compatibility with HTTP/2

... (truncated)

Changelog

Sourced from prometheus-client's changelog.

4.2.1 / 2023-08-04

Codename: If a bug falls in the forest

Bug fixes

• #291 Handle / in job name in Prometheus::Client::Push: Previously, if you included a / in your job name when using the Pushgateway client, you'd get a 400 error back as we didn't encode it properly. We now base64 encode it per the Pushgateway spec.

  It's possible that nobody has hit this bug (/ is fairly unlikely to appear in a job name) or that the error message (a 400 from Pushgateway with a complaint about an odd number of path components) didn't make it look like a bug in the Ruby client. Either way, this hopefully brings us fully in line with the spec!

4.2.0 / 2023-07-25

Codename: Funny number

Small improvements

• #287 Add Gauge#set_to_current_time: Does what you'd expect - sets a gauge to the current unix epoch timestamp (including fractional seconds).

  Other client libraries have this and it's about time we did!

4.1.0 / 2023-03-20

Codename: They finally made a point release

Small improvements

• #264 Add JRuby 9.3 to build matrix: JRuby 9.3 was released, and added as an officially supported version

• #273 Add Ruby 3.2 to build matrix: Ruby 3.2 was released, and added as an officially supported version

• #280 Optimize incrementing values in DirectFileStore adapter: There were some expensive method calls being made multiple times when they didn't need to be for simple increments. This PR introduces a specialised implementation for that case.

• #277 Allow use of instance and job labels: It's now possible to set the instance and job labels on metrics, where previously they had been reserved.

  The reason we'd reserved them is that Prometheus automatically generates values

... (truncated)

Commits

• e144d62 Merge pull request #292 from prometheus/sinjo-prepare-4-2-1
• a9e8a30 Prepare release 4.2.1
• 8dc02e4 Merge pull request #291 from prometheus/sinjo-base64-job-push
• 6f7b6cf Handle / in job name in Prometheus::Client::Push
• 77e6b7b Merge pull request #288 from prometheus/sinjo-prepare-release-4-2-0
• 6ce3fdd Prepare release 4.2.0
• 7507716 Merge pull request #287 from prometheus/sinjo-add-gauge-current-timestamp
• 1d96723 Add Gauge#set_to_current_time
• 907b495 Merge pull request #285 from duffn/duffn/update-test-headeres
• f543a3c Use Rack::Response#headers in place of header
• Additional commits viewable in compare view

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