InfluxDB is an open source time series database with no external dependencies. It's useful for recording metrics, events, and performing analytics.
The InfluxDB Helm chart uses the Helm package manager to bootstrap an InfluxDB StatefulSet and service on a Kubernetes cluster.
Note: ### If you're using the InfluxDB Enterprise Helm chart, check out InfluxDB Enterprise Helm chart.
- Helm v2 or later
- Kubernetes 1.4+
- (Optional) PersistentVolume (PV) provisioner support in the underlying infrastructure
-
Add the InfluxData Helm repository:
helm repo add influxdata https://helm.influxdata.com/
-
Run the following command, providing a name for your release:
helm upgrade --install my-release influxdata/influxdb
Tip:
--installcan be shortened to-i.This command deploys InfluxDB on the Kubernetes cluster using the default configuration. To find parameters you can configure during installation, see Configure the chart.
Tip: To view all Helm chart releases, run
helm list.
To uninstall the my-release deployment, use the following command:
helm uninstall my-releaseThis command removes all the Kubernetes components associated with the chart and deletes the release.
The following table lists configurable parameters, their descriptions, and their default values stored in values.yaml.
| Parameter | Description | Default |
|---|---|---|
| image.repository | Image repository url | influxdb |
| image.tag | Image tag | 1.8.0-alpine |
| image.pullPolicy | Image pull policy | IfNotPresent |
| image.pullSecrets | It will store the repository's credentials to pull image | nil |
| serviceAccount.create | It will create service account | true |
| serviceAccount.name | Service account name | "" |
| serviceAccount.annotations | Service account annotations | {} |
| livenessProbe | Health check for pod | {} |
| readinessProbe | Health check for pod | {} |
| startupProbe | Health check for pod | {} |
| service.type | Kubernetes service type | ClusterIP |
| service.loadBalancerIP | A user-specified IP address for service type LoadBalancer to use as External IP (if supported) | nil |
| service.externalIPs | A user-specified list of externalIPs to add to the service | nil |
| service.externalTrafficPolicy | A user specified external traffic policy | nil |
| service.nodePorts.http | Node port to expose for HTTP API if service.type=NodePort or service.type=LoadBalancer |
Random port from range 30000-32767 |
| persistence.enabled | Boolean to enable and disable persistance | true |
| persistence.existingClaim | An existing PersistentVolumeClaim, ignored if enterprise.enabled=true | nil |
| persistence.storageClass | If set to "-", storageClassName: "", which disables dynamic provisioning. If undefined (the default) or set to null, no storageClassName spec is set, choosing the default provisioner. (gp2 on AWS, standard on GKE, AWS & OpenStack | |
| persistence.annotations | Annotations for volumeClaimTemplates | nil |
| persistence.accessMode | Access mode for the volume | ReadWriteOnce |
| persistence.size | Storage size | 8Gi |
| podAnnotations | Annotations for pod | {} |
| podLabels | Labels for pod | {} |
| ingress.enabled | Boolean flag to enable or disable ingress | false |
| ingress.tls | Boolean to enable or disable tls for ingress. If enabled provide a secret in ingress.secretName containing TLS private key and certificate. |
false |
| ingress.secretName | Kubernetes secret containing TLS private key and certificate. It is only required if ingress.tls is enabled. |
nil |
| ingress.hostname | Hostname for the ingress | influxdb.foobar.com |
| ingress.annotations | ingress annotations | nil |
| schedulerName | Use an alternate scheduler, e.g. "stork". | nil |
| nodeSelector | Node labels for pod assignment | {} |
| affinity | Affinity for pod assignment | { |
| tolerations | Tolerations for pod assignment | [] |
| securityContext | securityContext for pod | {} |
| env | environment variables for influxdb container | {} |
| volumes | volumes stanza(s) to be used in the main container |
nil |
| mountPoints | volumeMount stanza(s) to be used in the main container |
nil |
| extraContainers | Additional containers to be added to the pod | {} |
| config.reporting_disabled | Details | false |
| config.rpc | RPC address for backup and storage | {} |
| config.meta | Details | {} |
| config.data | Details | {} |
| config.coordinator | Details | {} |
| config.retention | Details | {} |
| config.shard_precreation | Details | {} |
| config.monitor | Details | {} |
| config.http | Details | {} |
| config.logging | Details | {} |
| config.subscriber | Details | {} |
| config.graphite | Details | {} |
| config.collectd | Details | {} |
| config.opentsdb | Details | {} |
| config.udp | Details | {} |
| config.continous_queries | Details | {} |
| config.tls | Details | {} |
| initScripts.enabled | Boolean flag to enable and disable initscripts. If the container finds any files with the extensions .sh or .iql inside of the /docker-entrypoint-initdb.d folder, it will execute them. The order they are executed in is determined by the shell. This is usually alphabetical order. | false |
| initScripts.scripts | Init scripts | {} |
| backup.enabled | Enable backups, if true must configure one of the storage providers |
false |
| backup.gcs | Google Cloud Storage config | nil |
| backup.azure | Azure Blob Storage config | nil |
| backup.s3 | Amazon S3 (or compatible) config | nil |
| backup.schedule | Schedule to run jobs in cron format | 0 0 * * * |
| backup.startingDeadlineSeconds | Deadline in seconds for starting the job if it misses its scheduled time for any reason | nil |
| backup.annotations | Annotations for backup cronjob | {} |
| backup.podAnnotations | Annotations for backup cronjob pods | {} |
| backup.persistence.enabled | Boolean to enable and disable persistance | false |
| backup.persistence.storageClass | If set to "-", storageClassName: "", which disables dynamic provisioning. If undefined (the default) or set to null, no storageClassName spec is set, choosing the default provisioner. (gp2 on AWS, standard on GKE, AWS & OpenStack | |
| backup.persistence.annotations | Annotations for volumeClaimTemplates | nil |
| backup.persistence.accessMode | Access mode for the volume | ReadWriteOnce |
| backup.persistence.size | Storage size | 8Gi |
| backup.resources | Resources requests and limits for backup pods |
ephemeral-storage: 8Gi |
To configure the chart, do either of the following:
-
Specify each parameter using the
--set key=value[,key=value]argument tohelm upgrade --install. For example:helm upgrade --install my-release \ --set persistence.enabled=true,persistence.size=200Gi \ influxdata/influxdbThis command enables persistence and changes the size of the requested data volume to 200GB.
-
Provide a YAML file that specifies the parameter values while installing the chart. For example, use the following command:
helm upgrade --install my-release -f values.yaml influxdata/influxdb
Tip: Use the default values.yaml.
For information about running InfluxDB in Docker, see the full image documentation.
InfluxDB Enterprise includes features designed for production workloads, including high availability and horizontal scaling. InfluxDB Enterprise requires an InfluxDB Enterprise license.
To enable InfluxDB Enterprise, set the following keys and values in a values file provided to Helm.
| Key | Description | Recommended value |
|---|---|---|
livenessProbe.initalDelaySeconds |
Used to allow enough time to join meta nodes to a cluster | 3600 |
image.tag |
Set to a data image. See https://hub.docker.com/_/influxdb for details |
data |
service.ClusterIP |
Use a headless service for StatefulSets | "None" |
env.name[_HOSTNAME] |
Used to provide a unique name.service for InfluxDB. See values.yaml for an example |
valueFrom.fieldRef.fieldPath: metadata.name |
enterprise.enabled |
Create StatefulSets for use with influx-data and influx-meta images |
true |
enterprise.licensekey |
License for InfluxDB Enterprise | |
enterprise.clusterSize |
Replicas for influx StatefulSet |
Dependent on license |
enterprise.meta.image.tag |
Set to an meta image. See https://hub.docker.com/_/influxdb for details |
meta |
enterprise.meta.clusterSize |
Replicas for influxdb-meta StatefulSet. |
3 |
enterprise.meta.resources |
Resources requests and limits for meta influxdb-meta pods |
See values.yaml |
Meta and data pods must be joined using the command influxd-ctl found on meta pods.
We recommend running influxd-ctl on one and only one meta pod and joining meta pods together before data pods. For each meta pod, run influxd-ctl.
In the following examples, we use the pod names influxdb-meta-0 and influxdb-0 and the service name influxdb.
For example, using the default settings, your script should look something like this:
kubectl exec influxdb-meta-0 influxd-ctl add-meta influxdb-meta-0.influxdb-meta:8091From the same meta pod, for each data pod, run influxd-ctl. With default settings, your script should look something like this:
kubectl exec influxdb-meta-0 influxd-ctl add-data influxdb-0.influxdb:8088When using influxd-ctl, use the appropriate DNS name for your pods, following the naming scheme of pod.service.
The InfluxDB image stores data in the /var/lib/influxdb directory in the container.
If persistence is enabled, a Persistent Volume associated with StatefulSet is provisioned. The volume is created using dynamic volume provisioning. In case of a disruption (for example, a node drain), Kubernetes ensures that the same volume is reattached to the Pod, preventing any data loss. However, when persistence is not enabled, InfluxDB data is stored in an empty directory, so if a Pod restarts, data is lost.
In values.yaml, change .Values.config.http.auth-enabled to true.
To handle this set up during startup, set .Values.setDefaultUser.enabled to true.
Make sure to uncomment or configure default user settings after enabling it. If a password is not set, a random password will be generated.
Alternatively, if .Values.setDefaultUser.user.existingSecret is set the user and password are obtained from an existing Secret, the expected keys are influxdb-user and influxdb-password. Use this variable if you need to check in the values.yaml in a repository to avoid exposing your secrets.
Before proceeding, please read Backing up and restoring in InfluxDB OSS. While the chart offers backups by means of the backup-cronjob, restores do not fall under the chart's scope today but can be achieved by one-off kubernetes jobs.
When enabled, thebackup-cronjob runs on the configured schedule. One can create a job from the backup cronjob on demand as follows:
kubectl create job --from=cronjobs/influxdb-backup influx-backup-$(date +%Y%m%d%H%M%S)The backup process consists of an init-container that writes the backup to a
local volume, which is by default an emptyDir, shared to the runtime container
which uploads the backup to the configured object store.
In order to avoid filling the node's disk space, it is recommended to set a sufficient
ephemeral-storage request or enable persistence, which allocates a PVC.
Furthermore, if no object store provider is available, one can simply use the
PVC as the final storage destination when persistence is enabled.
It is up to the end user to configure their own one-off restore jobs. Below is just an example, which assumes that the backups are stored in GCS and that all dbs in the backup already exist and should be restored. It is to be used as a reference only; configure the init-container and the command and of the influxdb-restore container as well as both containers' resources to suit your needs.
apiVersion: batch/v1
kind: Job
metadata:
generateName: influxdb-restore-
namespace: monitoring
spec:
template:
spec:
volumes:
- name: backup
emptyDir: {}
serviceAccountName: influxdb
initContainers:
- name: init-gsutil-cp
image: google/cloud-sdk:alpine
command:
- /bin/sh
args:
- "-c"
- |
gsutil -m cp -r gs://<PATH TO BACKUP FOLDER>/* /backup
volumeMounts:
- name: backup
mountPath: /backup
resources:
requests:
cpu: 1
memory: 4Gi
limits:
cpu: 2
memory: 8Gi
containers:
- name: influxdb-restore
image: influxdb:1.8-alpine
volumeMounts:
- name: backup
mountPath: /backup
command:
- /bin/sh
args:
- "-c"
- |
#!/bin/sh
INFLUXDB_HOST=influxdb.monitoring.svc
for db in $(influx -host $INFLUXDB_HOST -execute 'SHOW DATABASES' | tail -n +5); do
influxd restore -host $INFLUXDB_HOST:8088 -portable -db "$db" -newdb "$db"_bak /backup
done
resources:
requests:
cpu: 100m
memory: 128Mi
limits:
cpu: 500m
memory: 512Mi
restartPolicy: OnFailureAt which point the data from the new <db name>_bak dbs would have to be side loaded into the original dbs.
Please see InfluxDB documentation for more restore examples.
Extra volumes can be mounted by providing the volumes and mountPoints keys, consistent
with the behavior of other charts provided by Influxdata.
volumes:
- name: ssl-cert-volume
secret:
secretName: secret-name
mountPoints:
- name: ssl-cert-volume
mountPath: /etc/ssl/certs/selfsigned/
readOnly: trueValues .Values.config.bind_address and .Values.exposeRpc no longer exist. They have been replaced with .Values.config.rpc.bind_address and .Values.config.rpc.enabled respectively. Please adjust your values file accordingly.
The Kubernetes API change to support 1.160 may not be backwards compatible and may require the chart to be uninstalled in order to upgrade. See this issue for some background.
Since version 3.0.0 this chart uses a StatefulSet instead of a Deployment. As part of this update the existing persistent volume (and all data) is deleted and a new one is created. Make sure to backup and restore the data manually.
Labels are changed in accordance with Kubernetes recommended labels. This change also removes the ability to configure clusterIP value to avoid Error: UPGRADE FAILED: failed to replace object: Service "my-influxdb" is invalid: spec.clusterIP: Invalid value: "": field is immutable type errors. For more information on this error and why it's important to avoid this error, please see this Github issue.
Due to the significance of the changes, we recommend uninstalling and reinstalling the chart (although the PVC shouldn't be deleted during this process, we highly recommended backing up your data beforehand).
Check out our Slack channel for support and information.