Chart version: 1.6.1
Api version: v1
App version: 1.6.1
Flagger is a progressive delivery operator for Kubernetes
Chart Type
Set me up:
helm repo add center https://repo.chartcenter.io
Install Chart:
helm install flagger center/flagger/flagger
Versions (0)


Flagger is an operator that automates the release process of applications on Kubernetes.

Flagger can run automated application analysis, testing, promotion and rollback for the following deployment strategies: * Canary Release (progressive traffic shifting) * A/B Testing (HTTP headers and cookies traffic routing) * Blue/Green (traffic switching and mirroring)

Flagger works with service mesh solutions (Istio, Linkerd, AWS App Mesh) and with Kubernetes ingress controllers (NGINX, Skipper, Gloo, Contour, Traefik). Flagger can be configured to send alerts to various chat platforms such as Slack, Microsoft Teams, Discord and Rocket.


  • Kubernetes >= 1.16

Installing the Chart

Add Flagger Helm repository:

$ helm repo add flagger https://flagger.app

Install Flagger’s custom resource definitions:

$ kubectl apply -f https://raw.githubusercontent.com/fluxcd/flagger/main/artifacts/flagger/crd.yaml

To install Flagger for Istio:

$ helm upgrade -i flagger flagger/flagger \
    --namespace=istio-system \
    --set meshProvider=istio \
    --set metricsServer=http://prometheus:9090

To install Flagger for Linkerd:

$ helm upgrade -i flagger flagger/flagger \
    --namespace=linkerd \
    --set meshProvider=linkerd \
    --set metricsServer=http://linkerd-prometheus:9090

To install Flagger for AWS App Mesh:

$ helm upgrade -i flagger flagger/flagger \
    --namespace=appmesh-system \
    --set meshProvider=appmesh:v1beta2 \
    --set metricsServer=http://appmesh-prometheus:9090

To install Flagger and Prometheus for NGINX Ingress (requires controller metrics enabled):

$ helm upgrade -i flagger flagger/flagger \
    --namespace=ingress-nginx \
    --set meshProvider=nginx \
    --set prometheus.install=true

To install Flagger and Prometheus for Gloo (requires Gloo discovery enabled):

$ helm upgrade -i flagger flagger/flagger \
    --namespace=gloo-system \
    --set meshProvider=gloo \
    --set prometheus.install=true

To install Flagger and Prometheus for Contour:

$ helm upgrade -i flagger flagger/flagger \
    --namespace=projectcontour \
    --set meshProvider=contour \
    --set ingressClass=contour \
    --set prometheus.install=true

To install Flagger and Prometheus for Traefik:

$ helm upgrade -i flagger flagger/flagger \
    --namespace=traefik \
    --set prometheus.install=true \
    --set meshProvider=traefik

The configuration section lists the parameters that can be configured during installation.

Uninstalling the Chart

To uninstall/delete the flagger deployment:

$ helm delete flagger

The command removes all the Kubernetes components associated with the chart and deletes the release.


The following tables lists the configurable parameters of the Flagger chart and their default values.

Parameter Description Default
image.repository Image repository ghcr.io/fluxcd/flagger
image.tag Image tag <VERSION>
image.pullPolicy Image pull policy IfNotPresent
logLevel Log level info
metricsServer Prometheus URL, used when prometheus.install is false http://prometheus.istio-system:9090
prometheus.install If true, installs Prometheus configured to scrape all pods in the custer false
prometheus.retention Prometheus data retention 2h
selectorLabels List of labels that Flagger uses to create pod selectors app,name,app.kubernetes.io/name
configTracking.enabled If true, flagger will track changes in Secrets and ConfigMaps referenced in the target deployment true
eventWebhook If set, Flagger will publish events to the given webhook None
slack.url Slack incoming webhook None
slack.channel Slack channel None
slack.user Slack username flagger
msteams.url Microsoft Teams incoming webhook None
podMonitor.enabled If true, create a PodMonitor for monitoring the metrics false
podMonitor.namespace Namespace where the PodMonitor is created the same namespace
podMonitor.interval Interval at which metrics should be scraped 15s
podMonitor.podMonitor Additional labels to add to the PodMonitor {}
leaderElection.enabled If true, Flagger will run in HA mode false
leaderElection.replicaCount Number of replicas 1
serviceAccount.create If true, Flagger will create service account true
serviceAccount.name The name of the service account to create or use. If not set and serviceAccount.create is true, a name is generated using the Flagger fullname ""
serviceAccount.annotations Annotations for service account {}
ingressAnnotationsPrefix Annotations prefix for ingresses custom.ingress.kubernetes.io
includeLabelPrefix List of prefixes of labels that are copied when creating primary deployments or daemonsets. Use * to include all ""
rbac.create If true, create and use RBAC resources true
rbac.pspEnabled If true, create and use a restricted pod security policy false
crd.create If true, create Flagger’s CRDs (should be enabled for Helm v2 only) false
resources.requests/cpu Pod CPU request 10m
resources.requests/memory Pod memory request 32Mi
resources.limits/cpu Pod CPU limit 1000m
resources.limits/memory Pod memory limit 512Mi
affinity Node/pod affinities None
nodeSelector Node labels for pod assignment {}
threadiness Number of controller workers 2
tolerations List of node taints to tolerate []
istio.kubeconfig.secretName The name of the Kubernetes secret containing the Istio shared control plane kubeconfig None
istio.kubeconfig.key The name of Kubernetes secret data key that contains the Istio control plane kubeconfig kubeconfig
ingressAnnotationsPrefix Annotations prefix for NGINX ingresses None
ingressClass Ingress class used for annotating HTTPProxy objects, e.g. contour None
podPriorityClassName PriorityClass name for pod priority configuration ””
podDisruptionBudget.enabled A PodDisruptionBudget will be created if true false
podDisruptionBudget.minAvailable The minimal number of available replicas that will be set in the PodDisruptionBudget 1

Specify each parameter using the --set key=value[,key=value] argument to helm upgrade. For example,

$ helm upgrade -i flagger flagger/flagger \
  --namespace flagger-system \
  --set slack.url=https://hooks.slack.com/services/YOUR/SLACK/WEBHOOK \
  --set slack.channel=general

Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,

$ helm upgrade -i flagger flagger/flagger \
  --namespace istio-system \
  -f values.yaml

Tip: You can use the default values.yaml