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docs/guides/guide-delete-or-replace-metrics/README.md: adds a link to the API examples (#6863)
### Describe Your Changes Adds a link to the API example section that describes how to delete metrics on VM Single. ### Checklist The following checks are **mandatory**: - [x] My change adheres [VictoriaMetrics contributing guidelines](https://docs.victoriametrics.com/contributing/). --------- Signed-off-by: hagen1778 <roman@victoriametrics.com> Co-authored-by: hagen1778 <roman@victoriametrics.com>
This commit is contained in:
Denys Holius
GitHub
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1b9f3b39b4
commit
336406e2e1
@ -18,11 +18,11 @@ To check that metrics are present in **VictoriaMetrics Cluster** run the followi
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_Warning: response can return many metrics, so be careful with series selector._
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```sh
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curl -s 'http://vmselect:8481/select/0/prometheus/api/v1/series?match[]=process_cpu_cores_available' | jq
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```
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_See URL example for single-node [here](https://docs.victoriametrics.com/url-examples/#apiv1series)._
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The expected output:
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@ -31,16 +31,6 @@ The expected output:
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"status": "success",
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"isPartial": false,
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"data": [
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{
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"__name__": "process_cpu_cores_available",
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"job": "vmagent",
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"instance": "vmagent:8429"
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},
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{
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"__name__": "process_cpu_cores_available",
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"job": "vmalert",
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"instance": "vmalert:8880"
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},
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{
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"__name__": "process_cpu_cores_available",
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"job": "vminsert",
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@ -54,31 +44,24 @@ The expected output:
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{
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"__name__": "process_cpu_cores_available",
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"job": "vmstorage",
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"instance": "vmstorage-1:8482"
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},
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{
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"__name__": "process_cpu_cores_available",
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"job": "vmstorage",
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"instance": "vmstorage-2:8482"
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"instance": "vmstorage:8482"
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}
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]
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}
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```
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When you're sure [time series selector](https://prometheus.io/docs/prometheus/latest/querying/basics/#time-series-selectors) is correct, send a POST request to [delete API](https://docs.victoriametrics.com/url-examples/#apiv1admintsdbdelete_series) with [`match[]=<time-series-selector>`](https://prometheus.io/docs/prometheus/latest/querying/basics/#time-series-selectors) argument. For example:
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```sh
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curl -s 'http://vmselect:8481/delete/0/prometheus/api/v1/admin/tsdb/delete_series?match[]=process_cpu_cores_available'
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```
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_See URL example for single-node [here](https://docs.victoriametrics.com/url-examples/#apiv1admintsdbdelete_series)._
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If operation was successful, the deleted series will stop being [queryable](https://docs.victoriametrics.com/keyconcepts/#query-data). Storage space for the deleted time series isn't freed instantly - it is freed during subsequent [background merges of data files](https://medium.com/@valyala/how-victoriametrics-makes-instant-snapshots-for-multi-terabyte-time-series-data-e1f3fb0e0282). The background merges may never occur for data from previous months, so storage space won't be freed for historical data. In this case [forced merge](https://docs.victoriametrics.com/single-server-victoriametrics/#forced-merge) may help freeing up storage space.
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To trigger [forced merge](https://docs.victoriametrics.com/single-server-victoriametrics/#forced-merge) on VictoriaMetrics Cluster run the following command:
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```sh
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curl -v -X POST http://vmstorage:8482/internal/force_merge
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```
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@ -98,21 +81,19 @@ By default, VictoriaMetrics doesn't provide a mechanism for replacing or updatin
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For example, let's export metric for `node_memory_MemTotal_bytes` with labels `instance="node-exporter:9100"` and `job="hostname.com"`:
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```sh
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curl -X POST -g http://vmselect:8481/select/0/prometheus/api/v1/export -d 'match[]=node_memory_MemTotal_bytes{instance="node-exporter:9100", job="hostname.com"}' > data.jsonl
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```
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_See URL example for single-node [here](https://docs.victoriametrics.com/url-examples/#apiv1export)._
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To check that exported file contains time series we can use [cat](https://man7.org/linux/man-pages/man1/cat.1.html) and [jq](https://stedolan.github.io/jq/download/)
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To check that exported file contains time series we can use [cat](https://man7.org/linux/man-pages/man1/cat.1.html) and [jq](https://stedolan.github.io/jq/download/):
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```sh
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cat data.jsonl | jq
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```
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The expected output will look like:
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The expected output will look like the following:
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```json
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{
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@ -137,7 +118,7 @@ The expected output will look like:
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```
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In this example, we will replace the values of `node_memory_MemTotal_bytes` from `33604390912` to `17179869184` (from 32Gb to 16Gb) via [sed](https://linux.die.net/man/1/sed), but it can be done in any of the available ways.
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In this example, we will replace the values of `node_memory_MemTotal_bytes` from `33604390912` to `17179869184` (from 32Gb to 16Gb) via [sed](https://linux.die.net/man/1/sed), but it can be done in any of the available ways:
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```sh
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sed -i 's/33604390912/17179869184/g' data.jsonl
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@ -149,7 +130,7 @@ Let's check the changes in data.jsonl with `cat`:
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cat data.jsonl | jq
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```
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The expected output will be the next:
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The expected output will be the following:
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```json
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{
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@ -175,27 +156,28 @@ The expected output will be the next:
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### Delete metrics
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See [How-to-delete-metrics](https://docs.victoriametrics.com/guides/guide-delete-or-replace-metrics.html#how-to-delete-metrics) from the previous paragraph
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See [How-to-delete-metrics](https://docs.victoriametrics.com/guides/guide-delete-or-replace-metrics.html#how-to-delete-metrics) from the previous paragraph.
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### Import metrics
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Victoriametrics supports a lot of [ingestion protocols](https://docs.victoriametrics.com/single-server-victoriametrics/#how-to-import-time-series-data) and we will use [import from JSON line format](https://docs.victoriametrics.com/single-server-victoriametrics/#how-to-import-data-in-json-line-format).
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VictoriaMetrics supports a lot of [ingestion protocols](https://docs.victoriametrics.com/single-server-victoriametrics/#how-to-import-time-series-data) and we will use [import from JSON line format](https://docs.victoriametrics.com/single-server-victoriametrics/#how-to-import-data-in-json-line-format).
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The next command will import metrics from `data.jsonl` to VictoriaMetrics:
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```sh
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curl -v -X POST http://vminsert:8480/insert/0/prometheus/api/v1/import -T data.jsonl
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```
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### Check imported metrics
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_See URL example for single-node [here](https://docs.victoriametrics.com/url-examples/#apiv1import)._
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Please note, importing data with old timestamps is called **backfilling** and may require resetting caches as described [here](https://docs.victoriametrics.com/#backfilling).
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### Check imported metrics
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```sh
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curl -X POST -g http://vmselect:8481/select/0/prometheus/api/v1/export -d match[]=node_memory_MemTotal_bytes
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```
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The expected output will look like:
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```json
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