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214 lines
9.0 KiB
Markdown
214 lines
9.0 KiB
Markdown
---
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sort: 5
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weight: 5
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title: Migration from Prometheus
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menu:
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docs:
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parent: "operator"
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weight: 5
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aliases:
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- /operator/migration.html
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---
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# Migration from prometheus-operator
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Design and implementation inspired by [prometheus-operator](https://github.com/prometheus-operator/prometheus-operator).
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It's great a tool for managing monitoring configuration of your applications. VictoriaMetrics operator has api capability with it.
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So you can use familiar CRD objects: `ServiceMonitor`, `PodMonitor`, `PrometheusRule`, `Probe` and `AlertmanagerConfig`.
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Or you can use VictoriaMetrics CRDs:
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- `VMServiceScrape` (instead of `ServiceMonitor`) - defines scraping metrics configuration from pods backed by services. [See details](./resources/vmservicescrape.md).
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- `VMPodScrape` (instead of `PodMonitor`) - defines scraping metrics configuration from pods. [See details](./resources/vmpodscrape.md).
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- `VMRule` (instead of `PrometheusRule`) - defines alerting or recording rules. [See details](./resources/vmrule.md).
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- `VMProbe` (instead of `Probe`) - defines a probing configuration for targets with blackbox exporter. [See details](./resources/vmprobe.md).
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- `VMAlertmanagerConfig` (instead of `AlertmanagerConfig`) - defines a configuration for AlertManager. [See details](./resources/vmalertmanagerconfig.md).
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- `VMScrapeConfig` (instead of `ScrapeConfig`) - define a scrape config using any of the service discovery options supported in victoriametrics.
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Note that Prometheus CRDs are not supplied with the VictoriaMetrics operator,
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so you need to [install them separately](https://github.com/prometheus-operator/prometheus-operator/releases).
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VictoriaMetrics operator supports conversion from Prometheus CRD of
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version `monitoring.coreos.com/v1` for kinds `ServiceMonitor`, `PodMonitor`, `PrometheusRule`, `Probe`
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and version `monitoring.coreos.com/v1alpha1` for kind `AlertmanagerConfig`.
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The default behavior of the operator is as follows:
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- It **converts** all existing Prometheus `ServiceMonitor`, `PodMonitor`, `PrometheusRule`, `Probe` and `ScrapeConfig` objects into corresponding VictoriaMetrics Operator objects.
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- It **syncs** updates (including labels) from Prometheus `ServiceMonitor`, `PodMonitor`, `PrometheusRule`, `Probe` and `ScrapeConfig` objects to corresponding VictoriaMetrics Operator objects.
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- It **DOES NOT delete** converted objects after original ones are deleted.
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With this configuration removing prometheus-operator API objects wouldn't delete any converted objects. So you can safely migrate or run two operators at the same time.
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You can change default behavior with operator configuration - [see details below](#objects-conversion).
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## Objects conversion
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By default, the vmoperator converts all existing [prometheus-operator](https://github.com/prometheus-operator/prometheus-operator)
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API objects into corresponding VictoriaMetrics Operator objects ([see above](#migration-from-prometheus-operator)),
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i.e. creates resources of VictoriaMetrics similar to Prometheus resources in the same namespace.
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You can control this behaviour by setting env variable for operator:
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```sh
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# disable convertion for each object
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VM_ENABLEDPROMETHEUSCONVERTER_PODMONITOR=false
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VM_ENABLEDPROMETHEUSCONVERTER_SERVICESCRAPE=false
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VM_ENABLEDPROMETHEUSCONVERTER_PROMETHEUSRULE=false
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VM_ENABLEDPROMETHEUSCONVERTER_PROBE=false
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VM_ENABLEDPROMETHEUSCONVERTER_SCRAPECONFIG=false
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```
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For [victoria-metrics-operator helm-chart](https://github.com/VictoriaMetrics/helm-charts/blob/master/charts/victoria-metrics-operator/README.md) you can use following way:
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```yaml
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# values.yaml
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# ...
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operator:
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# -- By default, operator converts prometheus-operator objects.
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disable_prometheus_converter: true
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# ...
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```
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Otherwise, VictoriaMetrics Operator would try to discover prometheus-operator API and convert it.
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<img src="migration_prometheus-conversion.png" width="1200">
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For more information about the operator's workflow, see [this doc](./README.md).
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## Deletion synchronization
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By default, the operator doesn't make converted objects disappear after original ones are deleted. To change this behaviour
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configure adding `OwnerReferences` to converted objects with following [operator parameter](./setup.md#settings):
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```sh
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VM_ENABLEDPROMETHEUSCONVERTEROWNERREFERENCES=true
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```
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For [victoria-metrics-operator helm-chart](https://github.com/VictoriaMetrics/helm-charts/blob/master/charts/victoria-metrics-operator/README.md) you can use following way:
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```yaml
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# values.yaml
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# ...
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operator:
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# -- Enables ownership reference for converted prometheus-operator objects,
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# it will remove corresponding victoria-metrics objects in case of deletion prometheus one.
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enable_converter_ownership: true
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# ...
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```
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Converted objects will be linked to the original ones and will be deleted by kubernetes after the original ones are deleted.
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## Update synchronization
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Conversion of api objects can be controlled by annotations, added to `VMObject`s.
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Annotation `operator.victoriametrics.com/ignore-prometheus-updates` controls updates from Prometheus api objects.
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By default, it set to `disabled`. You define it to `enabled` state and all updates from Prometheus api objects will be ignored.
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Example:
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```yaml
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apiVersion: operator.victoriametrics.com/v1beta1
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kind: VMServiceScrape
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metadata:
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annotations:
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meta.helm.sh/release-name: prometheus
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operator.victoriametrics.com/ignore-prometheus-updates: enabled
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labels:
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release: prometheus
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name: prometheus-monitor
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spec:
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endpoints: []
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```
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Annotation `operator.victoriametrics.com/ignore-prometheus-updates` can be set on one of the resources:
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- [VMServiceScrape](./resources/vmservicescrape.md)
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- [VMPodScrape](./resources/vmpodscrape.md)
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- [VMRule](./resources/vmrule.md)
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- [VMProbe](./resources/vmprobe.md)
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- [VMAlertmanagerConfig](./resources/vmalertmanagerconfig.md)
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- [VMScrapeConfig](./resources/vmscrapeconfig.md)
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And annotation doesn't make sense for [VMStaticScrape](./resources/vmstaticscrape.md)
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and [VMNodeScrape](./resources/vmnodescrape.md) because these objects are not created as a result of conversion.
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## Labels and annotations synchronization
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Conversion of api objects can be controlled by annotations, added to `VMObject`s.
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Annotation `operator.victoriametrics.com/merge-meta-strategy` controls syncing of metadata labels and annotations
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between `VMObject`s and `Prometheus` api objects during updates to `Prometheus` objects.
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By default, it has `prefer-prometheus`. And annotations and labels will be used from `Prometheus` objects, manually set values will be dropped.
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You can set it to `prefer-victoriametrics`. In this case all labels and annotations applied to `Prometheus` object will be ignored and `VMObject` will use own values.
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Two additional strategies annotations -`merge-victoriametrics-priority` and `merge-prometheus-priority` merges labelSets into one combined labelSet, with priority.
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Example:
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```yaml
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apiVersion: operator.victoriametrics.com/v1beta1
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kind: VMServiceScrape
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metadata:
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annotations:
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meta.helm.sh/release-name: prometheus
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operator.victoriametrics.com/merge-meta-strategy: prefer-victoriametrics
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labels:
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release: prometheus
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name: prometheus-monitor
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spec:
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endpoints: []
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```
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Annotation `operator.victoriametrics.com/merge-meta-strategy` can be set on one of the resources:
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- [VMServiceScrape](./resources/vmservicescrape.md)
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- [VMPodScrape](./resources/vmpodscrape.md)
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- [VMRule](./resources/vmrule.md)
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- [VMProbe](./resources/vmprobe.md)
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- [VMAlertmanagerConfig](./resources/vmalertmanagerconfig.md)
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- [VMScrapeConfig](./resources/vmscrapeconfig.md)
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And annotation doesn't make sense for [VMStaticScrape](./resources/vmstaticscrape.md)
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and [VMNodeScrape](./resources/vmnodescrape.md) because these objects are not created as a result of conversion.
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You can filter labels for syncing
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with [operator parameter](./setup.md#settings) `VM_FILTERPROMETHEUSCONVERTERLABELPREFIXES`:
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```sh
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# it excludes all labels that start with "helm.sh" or "argoproj.io" from synchronization
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VM_FILTERPROMETHEUSCONVERTERLABELPREFIXES=helm.sh,argoproj.io
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```
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In the same way, annotations with specified prefixes can be excluded from synchronization
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with [operator parameter](./setup.md#settings) `VM_FILTERPROMETHEUSCONVERTERANNOTATIONPREFIXES`:
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```sh
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# it excludes all annotations that start with "helm.sh" or "argoproj.io" from synchronization
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VM_FILTERPROMETHEUSCONVERTERANNOTATIONPREFIXES=helm.sh,argoproj.io
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```
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## Using converter with ArgoCD
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If you use ArgoCD, you can allow ignoring objects at ArgoCD converted from Prometheus CRD
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with [operator parameter](./setup.md#settings) `VM_PROMETHEUSCONVERTERADDARGOCDIGNOREANNOTATIONS`.
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It helps to properly use converter with ArgoCD and should help prevent out-of-sync issues with argo-cd based deployments:
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```sh
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# adds compare-options and sync-options for prometheus objects converted by operator
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VM_PROMETHEUSCONVERTERADDARGOCDIGNOREANNOTATIONS=true
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```
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## Data migration
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You can use [vmctl](https://docs.victoriametrics.com/vmctl.html) for migrating your data from Prometheus to VictoriaMetrics.
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See [this doc](https://docs.victoriametrics.com/vmctl.html#migrating-data-from-prometheus) for more details.
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