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136 lines
4.8 KiB
Markdown
136 lines
4.8 KiB
Markdown
---
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weight: 3
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title: Security
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menu:
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docs:
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parent: "operator"
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weight: 3
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aliases:
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- /operator/security/
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- /operator/security/index.html
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---
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## Access control
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### Roles
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To run in a cluster the operator needs certain permissions, you can see them in [this directory](https://github.com/VictoriaMetrics/operator/tree/master/config/rbac):
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- [`role.yaml` file](https://github.com/VictoriaMetrics/operator/blob/master/config/rbac/role.yaml) - basic set of cluster roles for launching an operator.
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- [`leader_election_role.yaml` file](https://github.com/VictoriaMetrics/operator/blob/master/config/rbac/leader_election_role.yaml) - set of roles with permissions to do leader election (is necessary to run the operator in several replicas for high availability).
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Also, you can use single-namespace mode with minimal permissions, see [this section](https://docs.victoriametrics.com/operator/configuration#namespaced-mode) for details.
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Also in [the same directory](https://github.com/VictoriaMetrics/operator/tree/master/config/rbac) are files with a set of separate permissions to view or edit [operator resources](https://docs.victoriametrics.com/operator/resources/) to organize fine-grained access:
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- file `<RESOURCE_NAME>_viewer_role.yaml` - permissions for viewing (`get`, `list` and `watch`) some resource of vmoperator.
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- file `<RESOURCE_NAME>_editor_role.yaml` - permissions for editing (`create`, `delete`, `patch`, `update` and `deletecollection`) some resource of vmoperator (also includes viewing permissions).
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For instance, [`vmalert_editor_role.yaml` file](https://github.com/VictoriaMetrics/operator/blob/master/config/rbac/operator_vmalert_editor_role.yaml) contain permission
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for editing [`vmagent` custom resources](https://docs.victoriametrics.com/operator/resources/vmagent).
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<!-- TODO: service accounts / role bindings? -->
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<!-- TODO: resource/roles relations -->
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## Security policies
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VictoriaMetrics operator provides several security features, such as [PodSecurityPolicies](https://kubernetes.io/docs/concepts/policy/pod-security-policy/),
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[PodSecurityContext](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/).
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### PodSecurityPolicy
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> PodSecurityPolicy was [deprecated](https://kubernetes.io/docs/concepts/security/pod-security-policy/) in Kubernetes v1.21, and removed from Kubernetes in v1.25.
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If your Kubernetes version is under v1.25 and want to use PodSecurityPolicy, you can set env `VM_PSPAUTOCREATEENABLED: "true"` in operator, it will create serviceAccount for each cluster resource and binds default `PodSecurityPolicy` to it.
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Default psp:
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```yaml
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apiVersion: policy/v1beta1
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kind: PodSecurityPolicy
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metadata:
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name: vmagent-example-vmagent
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spec:
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allowPrivilegeEscalation: false
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fsGroup:
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rule: RunAsAny
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hostNetwork: true
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requiredDropCapabilities:
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- ALL
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runAsUser:
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rule: RunAsAny
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seLinux:
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rule: RunAsAny
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supplementalGroups:
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rule: RunAsAny
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volumes:
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- persistentVolumeClaim
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- secret
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- emptyDir
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- configMap
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- projected
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- downwardAPI
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- nfs
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```
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User may also override default pod security policy with setting: `spec.podSecurityPolicyName: "psp-name"`.
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## PodSecurityContext
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VictoriaMetrics operator will add default Security Context to managed pods and containers if env `EnableStrictSecurity: "true"` is set.
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The following SecurityContext will be applied:
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### Pod SecurityContext
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1. **RunAsNonRoot: true**
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1. **RunAsUser/RunAsGroup/FSGroup: 65534**
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'65534' refers to 'nobody' in all the used default images like alpine, busybox.
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If you're using customize image, please make sure '65534' is a valid uid in there or specify SecurityContext.
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1. **FSGroupChangePolicy: &onRootMismatch**
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If KubeVersion>=1.20, use `FSGroupChangePolicy="onRootMismatch"` to skip the recursive permission change
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when the root of the volume already has the correct permissions
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1. **SeccompProfile: {type: RuntimeDefault}**
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Use `RuntimeDefault` seccomp profile by default, which is defined by the container runtime,
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instead of using the Unconfined (seccomp disabled) mode.
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### Container SecurityContext
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1. **AllowPrivilegeEscalation: false**
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1. **ReadOnlyRootFilesystem: true**
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1. **Capabilities: {drop: [all]}**
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Also `SecurityContext` can be configured with spec setting. It may be useful for mounted volumes, with `VMSingle` for example:
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```yaml
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apiVersion: operator.victoriametrics.com/v1beta1
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kind: VMSingle
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metadata:
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name: vmsingle-f
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namespace: monitoring-system
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spec:
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retentionPeriod: "2"
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removePvcAfterDelete: true
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securityContext:
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runAsUser: 1000
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fsGroup: 1000
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runAsGroup: 1000
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extraArgs:
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dedup.minScrapeInterval: 10s
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storage:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 25Gi
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resources:
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requests:
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cpu: "0.5"
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memory: "512Mi"
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limits:
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cpu: "1"
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memory: "1512Mi"
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```
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