rancher-partner-charts/charts/bitnami/airflow

Apache Airflow packaged by Bitnami

Apache Airflow is a tool to express and execute workflows as directed acyclic graphs (DAGs). It includes utilities to schedule tasks, monitor task progress and handle task dependencies.

Overview of Apache Airflow

Trademarks: This software listing is packaged by Bitnami. The respective trademarks mentioned in the offering are owned by the respective companies, and use of them does not imply any affiliation or endorsement.

TL;DR

helm repo add my-repo https://charts.bitnami.com/bitnami
helm install my-release my-repo/airflow

Introduction

This chart bootstraps an Apache Airflow deployment on a Kubernetes cluster using the Helm package manager.

Bitnami charts can be used with Kubeapps for deployment and management of Helm Charts in clusters.

Prerequisites

• Kubernetes 1.19+
• Helm 3.2.0+

Installing the Chart

To install the chart with the release name my-release:

helm repo add my-repo https://charts.bitnami.com/bitnami
helm install my-release my-repo/airflow

These commands deploy Airflow on the Kubernetes cluster in the default configuration. The Parameters section lists the parameters that can be configured during installation.

Tip: List all releases using helm list

Uninstalling the Chart

To uninstall/delete the my-release deployment:

helm delete my-release

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

Parameters

Global parameters

Name	Description	Value
global.imageRegistry	Global Docker image registry	""
global.imagePullSecrets	Global Docker registry secret names as an array	[]
global.storageClass	Global StorageClass for Persistent Volume(s)	""

Common parameters

Name	Description	Value
kubeVersion	Override Kubernetes version	""
nameOverride	String to partially override common.names.fullname template (will maintain the release name)	""
fullnameOverride	String to fully override common.names.fullname template	""
clusterDomain	Kubernetes Cluster Domain	cluster.local
extraDeploy	Extra objects to deploy (evaluated as a template)	[]
commonLabels	Add labels to all the deployed resources	{}
commonAnnotations	Add annotations to all the deployed resources	{}
diagnosticMode.enabled	Enable diagnostic mode (all probes will be disabled and the command will be overridden)	false
diagnosticMode.command	Command to override all containers in the the deployment(s)/statefulset(s)	["sleep"]
diagnosticMode.args	Args to override all containers in the the deployment(s)/statefulset(s)	["infinity"]

Airflow common parameters

Name	Description	Value
auth.username	Username to access web UI	user
auth.password	Password to access web UI	""
auth.fernetKey	Fernet key to secure connections	""
auth.secretKey	Secret key to run your flask app	""
auth.existingSecret	Name of an existing secret to use for Airflow credentials	""
executor	Airflow executor. Allowed values: SequentialExecutor, LocalExecutor, CeleryExecutor, KubernetesExecutor, CeleryKubernetesExecutor and LocalKubernetesExecutor	CeleryExecutor
loadExamples	Switch to load some Airflow examples	false
configuration	Specify content for Airflow config file (auto-generated based on other env. vars otherwise)	""
existingConfigmap	Name of an existing ConfigMap with the Airflow config file	""
dags.existingConfigmap	Name of an existing ConfigMap with all the DAGs files you want to load in Airflow	""
dags.image.registry	Init container load-dags image registry	docker.io
dags.image.repository	Init container load-dags image repository	bitnami/bitnami-shell
dags.image.tag	Init container load-dags image tag (immutable tags are recommended)	11-debian-11-r102
dags.image.digest	Init container load-dags image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
dags.image.pullPolicy	Init container load-dags image pull policy	IfNotPresent
dags.image.pullSecrets	Init container load-dags image pull secrets	[]
extraEnvVars	Add extra environment variables for all the Airflow pods	[]
extraEnvVarsCM	ConfigMap with extra environment variables for all the Airflow pods	""
extraEnvVarsSecret	Secret with extra environment variables for all the Airflow pods	""
extraEnvVarsSecrets	List of secrets with extra environment variables for all the Airflow pods	[]
sidecars	Add additional sidecar containers to all the Airflow pods	[]
initContainers	Add additional init containers to all the Airflow pods	[]
extraVolumeMounts	Optionally specify extra list of additional volumeMounts for all the Airflow pods	[]
extraVolumes	Optionally specify extra list of additional volumes for the all the Airflow pods	[]

Airflow web parameters

Name	Description	Value
web.image.registry	Airflow image registry	docker.io
web.image.repository	Airflow image repository	bitnami/airflow
web.image.tag	Airflow image tag (immutable tags are recommended)	2.5.3-debian-11-r0
web.image.digest	Airflow image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
web.image.pullPolicy	Airflow image pull policy	IfNotPresent
web.image.pullSecrets	Airflow image pull secrets	[]
web.image.debug	Enable image debug mode	false
web.baseUrl	URL used to access to Airflow web ui	""
web.existingConfigmap	Name of an existing config map containing the Airflow web config file	""
web.command	Override default container command (useful when using custom images)	[]
web.args	Override default container args (useful when using custom images)	[]
web.extraEnvVars	Array with extra environment variables to add Airflow web pods	[]
web.extraEnvVarsCM	ConfigMap containing extra environment variables for Airflow web pods	""
web.extraEnvVarsSecret	Secret containing extra environment variables (in case of sensitive data) for Airflow web pods	""
web.extraEnvVarsSecrets	List of secrets with extra environment variables for Airflow web pods	[]
web.containerPorts.http	Airflow web HTTP container port	8080
web.replicaCount	Number of Airflow web replicas	1
web.livenessProbe.enabled	Enable livenessProbe on Airflow web containers	true
web.livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	180
web.livenessProbe.periodSeconds	Period seconds for livenessProbe	20
web.livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	5
web.livenessProbe.failureThreshold	Failure threshold for livenessProbe	6
web.livenessProbe.successThreshold	Success threshold for livenessProbe	1
web.readinessProbe.enabled	Enable readinessProbe on Airflow web containers	true
web.readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	30
web.readinessProbe.periodSeconds	Period seconds for readinessProbe	10
web.readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	5
web.readinessProbe.failureThreshold	Failure threshold for readinessProbe	6
web.readinessProbe.successThreshold	Success threshold for readinessProbe	1
web.startupProbe.enabled	Enable startupProbe on Airflow web containers	false
web.startupProbe.initialDelaySeconds	Initial delay seconds for startupProbe	60
web.startupProbe.periodSeconds	Period seconds for startupProbe	10
web.startupProbe.timeoutSeconds	Timeout seconds for startupProbe	1
web.startupProbe.failureThreshold	Failure threshold for startupProbe	15
web.startupProbe.successThreshold	Success threshold for startupProbe	1
web.customLivenessProbe	Custom livenessProbe that overrides the default one	{}
web.customReadinessProbe	Custom readinessProbe that overrides the default one	{}
web.customStartupProbe	Custom startupProbe that overrides the default one	{}
web.resources.limits	The resources limits for the Airflow web containers	{}
web.resources.requests	The requested resources for the Airflow web containers	{}
web.podSecurityContext.enabled	Enabled Airflow web pods' Security Context	true
web.podSecurityContext.fsGroup	Set Airflow web pod's Security Context fsGroup	1001
web.containerSecurityContext.enabled	Enabled Airflow web containers' Security Context	true
web.containerSecurityContext.runAsUser	Set Airflow web containers' Security Context runAsUser	1001
web.containerSecurityContext.runAsNonRoot	Set Airflow web containers' Security Context runAsNonRoot	true
web.lifecycleHooks	for the Airflow web container(s) to automate configuration before or after startup	{}
web.hostAliases	Deployment pod host aliases	[]
web.podLabels	Add extra labels to the Airflow web pods	{}
web.podAnnotations	Add extra annotations to the Airflow web pods	{}
web.affinity	Affinity for Airflow web pods assignment (evaluated as a template)	{}
web.nodeAffinityPreset.key	Node label key to match. Ignored if web.affinity is set.	""
web.nodeAffinityPreset.type	Node affinity preset type. Ignored if web.affinity is set. Allowed values: soft or hard	""
web.nodeAffinityPreset.values	Node label values to match. Ignored if web.affinity is set.	[]
web.nodeSelector	Node labels for Airflow web pods assignment	{}
web.podAffinityPreset	Pod affinity preset. Ignored if web.affinity is set. Allowed values: soft or hard.	""
web.podAntiAffinityPreset	Pod anti-affinity preset. Ignored if web.affinity is set. Allowed values: soft or hard.	soft
web.tolerations	Tolerations for Airflow web pods assignment	[]
web.topologySpreadConstraints	Topology Spread Constraints for pod assignment spread across your cluster among failure-domains. Evaluated as a template	[]
web.priorityClassName	Priority Class Name	""
web.schedulerName	Use an alternate scheduler, e.g. "stork".	""
web.terminationGracePeriodSeconds	Seconds Airflow web pod needs to terminate gracefully	""
web.updateStrategy.type	Airflow web deployment strategy type	RollingUpdate
web.updateStrategy.rollingUpdate	Airflow web deployment rolling update configuration parameters	{}
web.sidecars	Add additional sidecar containers to the Airflow web pods	[]
web.initContainers	Add additional init containers to the Airflow web pods	[]
web.extraVolumeMounts	Optionally specify extra list of additional volumeMounts for the Airflow web pods	[]
web.extraVolumes	Optionally specify extra list of additional volumes for the Airflow web pods	[]
web.pdb.create	Deploy a pdb object for the Airflow web pods	false
web.pdb.minAvailable	Maximum number/percentage of unavailable Airflow web replicas	1
web.pdb.maxUnavailable	Maximum number/percentage of unavailable Airflow web replicas	""

Airflow scheduler parameters

Name	Description	Value
scheduler.image.registry	Airflow Scheduler image registry	docker.io
scheduler.image.repository	Airflow Scheduler image repository	bitnami/airflow-scheduler
scheduler.image.tag	Airflow Scheduler image tag (immutable tags are recommended)	2.5.3-debian-11-r0
scheduler.image.digest	Airflow Schefuler image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
scheduler.image.pullPolicy	Airflow Scheduler image pull policy	IfNotPresent
scheduler.image.pullSecrets	Airflow Scheduler image pull secrets	[]
scheduler.image.debug	Enable image debug mode	false
scheduler.replicaCount	Number of scheduler replicas	1
scheduler.command	Override cmd	[]
scheduler.args	Override args	[]
scheduler.extraEnvVars	Add extra environment variables	[]
scheduler.extraEnvVarsCM	ConfigMap with extra environment variables	""
scheduler.extraEnvVarsSecret	Secret with extra environment variables	""
scheduler.extraEnvVarsSecrets	List of secrets with extra environment variables for Airflow scheduler pods	[]
scheduler.customLivenessProbe	Custom livenessProbe that overrides the default one	{}
scheduler.customReadinessProbe	Custom readinessProbe that overrides the default one	{}
scheduler.customStartupProbe	Custom startupProbe that overrides the default one	{}
scheduler.resources.limits	The resources limits for the Airflow scheduler containers	{}
scheduler.resources.requests	The requested resources for the Airflow scheduler containers	{}
scheduler.podSecurityContext.enabled	Enabled Airflow scheduler pods' Security Context	true
scheduler.podSecurityContext.fsGroup	Set Airflow scheduler pod's Security Context fsGroup	1001
scheduler.containerSecurityContext.enabled	Enabled Airflow scheduler containers' Security Context	true
scheduler.containerSecurityContext.runAsUser	Set Airflow scheduler containers' Security Context runAsUser	1001
scheduler.containerSecurityContext.runAsNonRoot	Set Airflow scheduler containers' Security Context runAsNonRoot	true
scheduler.lifecycleHooks	for the Airflow scheduler container(s) to automate configuration before or after startup	{}
scheduler.hostAliases	Deployment pod host aliases	[]
scheduler.podLabels	Add extra labels to the Airflow scheduler pods	{}
scheduler.podAnnotations	Add extra annotations to the Airflow scheduler pods	{}
scheduler.affinity	Affinity for Airflow scheduler pods assignment (evaluated as a template)	{}
scheduler.nodeAffinityPreset.key	Node label key to match. Ignored if scheduler.affinity is set.	""
scheduler.nodeAffinityPreset.type	Node affinity preset type. Ignored if scheduler.affinity is set. Allowed values: soft or hard	""
scheduler.nodeAffinityPreset.values	Node label values to match. Ignored if scheduler.affinity is set.	[]
scheduler.nodeSelector	Node labels for Airflow scheduler pods assignment	{}
scheduler.podAffinityPreset	Pod affinity preset. Ignored if scheduler.affinity is set. Allowed values: soft or hard.	""
scheduler.podAntiAffinityPreset	Pod anti-affinity preset. Ignored if scheduler.affinity is set. Allowed values: soft or hard.	soft
scheduler.tolerations	Tolerations for Airflow scheduler pods assignment	[]
scheduler.topologySpreadConstraints	Topology Spread Constraints for pod assignment spread across your cluster among failure-domains. Evaluated as a template	[]
scheduler.priorityClassName	Priority Class Name	""
scheduler.schedulerName	Use an alternate scheduler, e.g. "stork".	""
scheduler.terminationGracePeriodSeconds	Seconds Airflow scheduler pod needs to terminate gracefully	""
scheduler.updateStrategy.type	Airflow scheduler deployment strategy type	RollingUpdate
scheduler.updateStrategy.rollingUpdate	Airflow scheduler deployment rolling update configuration parameters	{}
scheduler.sidecars	Add additional sidecar containers to the Airflow scheduler pods	[]
scheduler.initContainers	Add additional init containers to the Airflow scheduler pods	[]
scheduler.extraVolumeMounts	Optionally specify extra list of additional volumeMounts for the Airflow scheduler pods	[]
scheduler.extraVolumes	Optionally specify extra list of additional volumes for the Airflow scheduler pods	[]
scheduler.pdb.create	Deploy a pdb object for the Airflow scheduler pods	false
scheduler.pdb.minAvailable	Maximum number/percentage of unavailable Airflow scheduler replicas	1
scheduler.pdb.maxUnavailable	Maximum number/percentage of unavailable Airflow scheduler replicas	""

Airflow worker parameters

Name	Description	Value
worker.image.registry	Airflow Worker image registry	docker.io
worker.image.repository	Airflow Worker image repository	bitnami/airflow-worker
worker.image.tag	Airflow Worker image tag (immutable tags are recommended)	2.5.3-debian-11-r0
worker.image.digest	Airflow Worker image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
worker.image.pullPolicy	Airflow Worker image pull policy	IfNotPresent
worker.image.pullSecrets	Airflow Worker image pull secrets	[]
worker.image.debug	Enable image debug mode	false
worker.command	Override default container command (useful when using custom images)	[]
worker.args	Override default container args (useful when using custom images)	[]
worker.extraEnvVars	Array with extra environment variables to add Airflow worker pods	[]
worker.extraEnvVarsCM	ConfigMap containing extra environment variables for Airflow worker pods	""
worker.extraEnvVarsSecret	Secret containing extra environment variables (in case of sensitive data) for Airflow worker pods	""
worker.extraEnvVarsSecrets	List of secrets with extra environment variables for Airflow worker pods	[]
worker.containerPorts.http	Airflow worker HTTP container port	8793
worker.replicaCount	Number of Airflow worker replicas	1
worker.livenessProbe.enabled	Enable livenessProbe on Airflow worker containers	true
worker.livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	180
worker.livenessProbe.periodSeconds	Period seconds for livenessProbe	20
worker.livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	5
worker.livenessProbe.failureThreshold	Failure threshold for livenessProbe	6
worker.livenessProbe.successThreshold	Success threshold for livenessProbe	1
worker.readinessProbe.enabled	Enable readinessProbe on Airflow worker containers	true
worker.readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	30
worker.readinessProbe.periodSeconds	Period seconds for readinessProbe	10
worker.readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	5
worker.readinessProbe.failureThreshold	Failure threshold for readinessProbe	6
worker.readinessProbe.successThreshold	Success threshold for readinessProbe	1
worker.startupProbe.enabled	Enable startupProbe on Airflow worker containers	false
worker.startupProbe.initialDelaySeconds	Initial delay seconds for startupProbe	60
worker.startupProbe.periodSeconds	Period seconds for startupProbe	10
worker.startupProbe.timeoutSeconds	Timeout seconds for startupProbe	1
worker.startupProbe.failureThreshold	Failure threshold for startupProbe	15
worker.startupProbe.successThreshold	Success threshold for startupProbe	1
worker.customLivenessProbe	Custom livenessProbe that overrides the default one	{}
worker.customReadinessProbe	Custom readinessProbe that overrides the default one	{}
worker.customStartupProbe	Custom startupProbe that overrides the default one	{}
worker.resources.limits	The resources limits for the Airflow worker containers	{}
worker.resources.requests	The requested resources for the Airflow worker containers	{}
worker.podSecurityContext.enabled	Enabled Airflow worker pods' Security Context	true
worker.podSecurityContext.fsGroup	Set Airflow worker pod's Security Context fsGroup	1001
worker.containerSecurityContext.enabled	Enabled Airflow worker containers' Security Context	true
worker.containerSecurityContext.runAsUser	Set Airflow worker containers' Security Context runAsUser	1001
worker.containerSecurityContext.runAsNonRoot	Set Airflow worker containers' Security Context runAsNonRoot	true
worker.lifecycleHooks	for the Airflow worker container(s) to automate configuration before or after startup	{}
worker.hostAliases	Deployment pod host aliases	[]
worker.podLabels	Add extra labels to the Airflow worker pods	{}
worker.podAnnotations	Add extra annotations to the Airflow worker pods	{}
worker.affinity	Affinity for Airflow worker pods assignment (evaluated as a template)	{}
worker.nodeAffinityPreset.key	Node label key to match. Ignored if worker.affinity is set.	""
worker.nodeAffinityPreset.type	Node affinity preset type. Ignored if worker.affinity is set. Allowed values: soft or hard	""
worker.nodeAffinityPreset.values	Node label values to match. Ignored if worker.affinity is set.	[]
worker.nodeSelector	Node labels for Airflow worker pods assignment	{}
worker.podAffinityPreset	Pod affinity preset. Ignored if worker.affinity is set. Allowed values: soft or hard.	""
worker.podAntiAffinityPreset	Pod anti-affinity preset. Ignored if worker.affinity is set. Allowed values: soft or hard.	soft
worker.tolerations	Tolerations for Airflow worker pods assignment	[]
worker.topologySpreadConstraints	Topology Spread Constraints for pod assignment spread across your cluster among failure-domains. Evaluated as a template	[]
worker.priorityClassName	Priority Class Name	""
worker.schedulerName	Use an alternate scheduler, e.g. "stork".	""
worker.terminationGracePeriodSeconds	Seconds Airflow worker pod needs to terminate gracefully	""
worker.updateStrategy.type	Airflow worker deployment strategy type	RollingUpdate
worker.updateStrategy.rollingUpdate	Airflow worker deployment rolling update configuration parameters	{}
worker.sidecars	Add additional sidecar containers to the Airflow worker pods	[]
worker.initContainers	Add additional init containers to the Airflow worker pods	[]
worker.extraVolumeMounts	Optionally specify extra list of additional volumeMounts for the Airflow worker pods	[]
worker.extraVolumes	Optionally specify extra list of additional volumes for the Airflow worker pods	[]
worker.extraVolumeClaimTemplates	Optionally specify extra list of volumesClaimTemplates for the Airflow worker statefulset	[]
worker.podTemplate	Template to replace the default one to be use when executor=KubernetesExecutor to create Airflow worker pods	{}
worker.pdb.create	Deploy a pdb object for the Airflow worker pods	false
worker.pdb.minAvailable	Maximum number/percentage of unavailable Airflow worker replicas	1
worker.pdb.maxUnavailable	Maximum number/percentage of unavailable Airflow worker replicas	""
worker.autoscaling.enabled	Whether enable horizontal pod autoscaler	false
worker.autoscaling.minReplicas	Configure a minimum amount of pods	1
worker.autoscaling.maxReplicas	Configure a maximum amount of pods	3
worker.autoscaling.targetCPU	Define the CPU target to trigger the scaling actions (utilization percentage)	80
worker.autoscaling.targetMemory	Define the memory target to trigger the scaling actions (utilization percentage)	80

Airflow git sync parameters

Name	Description	Value
git.image.registry	Git image registry	docker.io
git.image.repository	Git image repository	bitnami/git
git.image.tag	Git image tag (immutable tags are recommended)	2.40.0-debian-11-r5
git.image.digest	Git image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
git.image.pullPolicy	Git image pull policy	IfNotPresent
git.image.pullSecrets	Git image pull secrets	[]
git.dags.enabled	Enable in order to download DAG files from git repositories.	false
git.dags.repositories	Array of repositories from which to download DAG files	[]
git.plugins.enabled	Enable in order to download Plugins files from git repositories.	false
git.plugins.repositories	Array of repositories from which to download DAG files	[]
git.clone.command	Override cmd	[]
git.clone.args	Override args	[]
git.clone.extraVolumeMounts	Add extra volume mounts	[]
git.clone.extraEnvVars	Add extra environment variables	[]
git.clone.extraEnvVarsCM	ConfigMap with extra environment variables	""
git.clone.extraEnvVarsSecret	Secret with extra environment variables	""
git.clone.resources	Clone init container resource requests and limits	{}
git.sync.interval	Interval in seconds to pull the git repository containing the plugins and/or DAG files	60
git.sync.command	Override cmd	[]
git.sync.args	Override args	[]
git.sync.extraVolumeMounts	Add extra volume mounts	[]
git.sync.extraEnvVars	Add extra environment variables	[]
git.sync.extraEnvVarsCM	ConfigMap with extra environment variables	""
git.sync.extraEnvVarsSecret	Secret with extra environment variables	""
git.sync.resources	Sync sidecar container resource requests and limits	{}

Airflow ldap parameters

Name	Description	Value
ldap.enabled	Enable LDAP authentication	false
ldap.uri	Server URI, eg. ldap://ldap_server:389	ldap://ldap_server:389
ldap.basedn	Base of the search, eg. ou=example,o=org.	dc=example,dc=org
ldap.searchAttribute	if doing an indirect bind to ldap, this is the field that matches the username when searching for the account to bind to	cn
ldap.binddn	DN of the account used to search in the LDAP server.	cn=admin,dc=example,dc=org
ldap.bindpw	Bind Password	""
ldap.userRegistration	Set to True to enable user self registration	True
ldap.userRegistrationRole	Set role name to be assign when a user registers himself. This role must already exist. Mandatory when using ldap.userRegistration	Public
ldap.rolesMapping	mapping from LDAP DN to a list of roles	{ "cn=All,ou=Groups,dc=example,dc=org": ["User"], "cn=Admins,ou=Groups,dc=example,dc=org": ["Admin"], }
ldap.rolesSyncAtLogin	replace ALL the user's roles each login, or only on registration	True
ldap.tls.enabled	Enabled TLS/SSL for LDAP, you must include the CA file.	false
ldap.tls.allowSelfSigned	Allow to use self signed certificates	true
ldap.tls.certificatesSecret	Name of the existing secret containing the certificate CA file that will be used by ldap client	""
ldap.tls.certificatesMountPath	Where LDAP certifcates are mounted.	/opt/bitnami/airflow/conf/certs
ldap.tls.CAFilename	LDAP CA cert filename	""

Traffic Exposure Parameters

Name	Description	Value
service.type	Airflow service type	ClusterIP
service.ports.http	Airflow service HTTP port	8080
service.nodePorts.http	Node port for HTTP	""
service.sessionAffinity	Control where client requests go, to the same pod or round-robin	None
service.sessionAffinityConfig	Additional settings for the sessionAffinity	{}
service.clusterIP	Airflow service Cluster IP	""
service.loadBalancerIP	Airflow service Load Balancer IP	""
service.loadBalancerSourceRanges	Airflow service Load Balancer sources	[]
service.externalTrafficPolicy	Airflow service external traffic policy	Cluster
service.annotations	Additional custom annotations for Airflow service	{}
service.extraPorts	Extra port to expose on Airflow service	[]
ingress.enabled	Enable ingress record generation for Airflow	false
ingress.ingressClassName	IngressClass that will be be used to implement the Ingress (Kubernetes 1.18+)	""
ingress.pathType	Ingress path type	ImplementationSpecific
ingress.apiVersion	Force Ingress API version (automatically detected if not set)	""
ingress.hostname	Default host for the ingress record	airflow.local
ingress.path	Default path for the ingress record	/
ingress.annotations	Additional annotations for the Ingress resource. To enable certificate autogeneration, place here your cert-manager annotations.	{}
ingress.tls	Enable TLS configuration for the host defined at ingress.hostname parameter	false
ingress.selfSigned	Create a TLS secret for this ingress record using self-signed certificates generated by Helm	false
ingress.extraHosts	An array with additional hostname(s) to be covered with the ingress record	[]
ingress.extraPaths	An array with additional arbitrary paths that may need to be added to the ingress under the main host	[]
ingress.extraTls	TLS configuration for additional hostname(s) to be covered with this ingress record	[]
ingress.secrets	Custom TLS certificates as secrets	[]
ingress.extraRules	Additional rules to be covered with this ingress record	[]

Other Parameters

Name	Description	Value
serviceAccount.create	Enable creation of ServiceAccount for Airflow pods	false
serviceAccount.name	The name of the ServiceAccount to use.	""
serviceAccount.automountServiceAccountToken	Allows auto mount of ServiceAccountToken on the serviceAccount created	true
serviceAccount.annotations	Additional custom annotations for the ServiceAccount	{}
rbac.create	Create Role and RoleBinding	false
rbac.rules	Custom RBAC rules to set	[]

Airflow metrics parameters

Name	Description	Value
metrics.enabled	Whether or not to create a standalone Airflow exporter to expose Airflow metrics	false
metrics.image.registry	Airflow exporter image registry	docker.io
metrics.image.repository	Airflow exporter image repository	bitnami/airflow-exporter
metrics.image.tag	Airflow exporter image tag (immutable tags are recommended)	0.20220314.0-debian-11-r106
metrics.image.digest	Airflow exporter image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
metrics.image.pullPolicy	Airflow exporter image pull policy	IfNotPresent
metrics.image.pullSecrets	Airflow exporter image pull secrets	[]
metrics.extraEnvVars	Array with extra environment variables to add Airflow exporter pods	[]
metrics.extraEnvVarsCM	ConfigMap containing extra environment variables for Airflow exporter pods	""
metrics.extraEnvVarsSecret	Secret containing extra environment variables (in case of sensitive data) for Airflow exporter pods	""
metrics.containerPorts.http	Airflow exporter metrics container port	9112
metrics.resources.limits	The resources limits for the container	{}
metrics.resources.requests	The requested resources for the container	{}
metrics.podSecurityContext.enabled	Enable security context for the pods	true
metrics.podSecurityContext.fsGroup	Set Airflow exporter pod's Security Context fsGroup	1001
metrics.containerSecurityContext.enabled	Enable Airflow exporter containers' Security Context	true
metrics.containerSecurityContext.runAsUser	Set Airflow exporter containers' Security Context runAsUser	1001
metrics.containerSecurityContext.runAsNonRoot	Set Airflow exporter containers' Security Context runAsNonRoot	true
metrics.lifecycleHooks	for the Airflow exporter container(s) to automate configuration before or after startup	{}
metrics.hostAliases	Airflow exporter pods host aliases	[]
metrics.podLabels	Extra labels for Airflow exporter pods	{}
metrics.podAnnotations	Extra annotations for Airflow exporter pods	{}
metrics.podAffinityPreset	Pod affinity preset. Ignored if metrics.affinity is set. Allowed values: soft or hard	""
metrics.podAntiAffinityPreset	Pod anti-affinity preset. Ignored if metrics.affinity is set. Allowed values: soft or hard	soft
metrics.nodeAffinityPreset.type	Node affinity preset type. Ignored if metrics.affinity is set. Allowed values: soft or hard	""
metrics.nodeAffinityPreset.key	Node label key to match Ignored if metrics.affinity is set.	""
metrics.nodeAffinityPreset.values	Node label values to match. Ignored if metrics.affinity is set.	[]
metrics.affinity	Affinity for pod assignment	{}
metrics.nodeSelector	Node labels for pod assignment	{}
metrics.tolerations	Tolerations for pod assignment	[]
metrics.schedulerName	Name of the k8s scheduler (other than default) for Airflow exporter	""
metrics.service.ports.http	Airflow exporter metrics service port	9112
metrics.service.clusterIP	Static clusterIP or None for headless services	""
metrics.service.sessionAffinity	Control where client requests go, to the same pod or round-robin	None
metrics.service.annotations	Annotations for the Airflow exporter service	{}
metrics.serviceMonitor.enabled	if true, creates a Prometheus Operator ServiceMonitor (requires metrics.enabled to be true)	false
metrics.serviceMonitor.namespace	Namespace in which Prometheus is running	""
metrics.serviceMonitor.interval	Interval at which metrics should be scraped	""
metrics.serviceMonitor.scrapeTimeout	Timeout after which the scrape is ended	""
metrics.serviceMonitor.labels	Additional labels that can be used so ServiceMonitor will be discovered by Prometheus	{}
metrics.serviceMonitor.selector	Prometheus instance selector labels	{}
metrics.serviceMonitor.relabelings	RelabelConfigs to apply to samples before scraping	[]
metrics.serviceMonitor.metricRelabelings	MetricRelabelConfigs to apply to samples before ingestion	[]
metrics.serviceMonitor.honorLabels	Specify honorLabels parameter to add the scrape endpoint	false
metrics.serviceMonitor.jobLabel	The name of the label on the target service to use as the job name in prometheus.	""

Airflow database parameters

Name	Description	Value
postgresql.enabled	Switch to enable or disable the PostgreSQL helm chart	true
postgresql.auth.enablePostgresUser	Assign a password to the "postgres" admin user. Otherwise, remote access will be blocked for this user	false
postgresql.auth.username	Name for a custom user to create	bn_airflow
postgresql.auth.password	Password for the custom user to create	""
postgresql.auth.database	Name for a custom database to create	bitnami_airflow
postgresql.auth.existingSecret	Name of existing secret to use for PostgreSQL credentials	""
postgresql.architecture	PostgreSQL architecture (standalone or replication)	standalone
externalDatabase.host	Database host	localhost
externalDatabase.port	Database port number	5432
externalDatabase.user	Non-root username for Airflow	bn_airflow
externalDatabase.password	Password for the non-root username for Airflow	""
externalDatabase.database	Airflow database name	bitnami_airflow
externalDatabase.existingSecret	Name of an existing secret resource containing the database credentials	""
externalDatabase.existingSecretPasswordKey	Name of an existing secret key containing the database credentials	""
redis.enabled	Switch to enable or disable the Redis® helm	true
redis.auth.enabled	Enable password authentication	true
redis.auth.password	Redis® password	""
redis.auth.existingSecret	The name of an existing secret with Redis® credentials	""
redis.architecture	Redis® architecture. Allowed values: standalone or replication	standalone
externalRedis.host	Redis® host	localhost
externalRedis.port	Redis® port number	6379
externalRedis.username	Redis® username	""
externalRedis.password	Redis® password	""
externalRedis.existingSecret	Name of an existing secret resource containing the Redis&trade credentials	""
externalRedis.existingSecretPasswordKey	Name of an existing secret key containing the Redis&trade credentials	""

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

helm install my-release \
               --set auth.username=my-user \
               --set auth.password=my-passsword \
               --set auth.fernetKey=my-fernet-key \
               --set auth.secretKey=my-secret-key \
               my-repo/airflow

The above command sets the credentials to access the Airflow web UI.

NOTE: Once this chart is deployed, it is not possible to change the application's access credentials, such as usernames or passwords, using Helm. To change these application credentials after deployment, delete any persistent volumes (PVs) used by the chart and re-deploy it, or use the application's built-in administrative tools if available.

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

helm install my-release -f values.yaml my-repo/airflow

Tip: You can use the default values.yaml

Configuration and installation details

Rolling VS Immutable tags

It is strongly recommended to use immutable tags in a production environment. This ensures your deployment does not change automatically if the same tag is updated with a different image.

Bitnami will release a new chart updating its containers if a new version of the main container, significant changes, or critical vulnerabilities exist.

Generate a Fernet key

A Fernet key is required in order to encrypt password within connections. The Fernet key must be a base64-encoded 32-byte key.

Learn how to generate one here

Generate a Secret key

Secret key used to run your flask app. It should be as random as possible. However, when running more than 1 instances of webserver, make sure all of them use the same secret_key otherwise one of them will error with "CSRF session token is missing".

Load DAG files

There are two different ways to load your custom DAG files into the Airflow chart. All of them are compatible so you can use more than one at the same time.

Option 1: Specify an existing config map

You can manually create a config map containing all your DAG files and then pass the name when deploying Airflow chart. For that, you can pass the option dags.existingConfigmap.

Option 2: Get your DAG files from a git repository

You can store all your DAG files on GitHub repositories and then clone to the Airflow pods with an initContainer. The repositories will be periodically updated using a sidecar container. In order to do that, you can deploy airflow with the following options:

NOTE: When enabling git synchronization, an init container and sidecar container will be added for all the pods running airflow, this will allow scheduler, worker and web component to reach dags if it was needed.

git.dags.enabled=true
git.dags.repositories[0].repository=https://github.com/USERNAME/REPOSITORY
git.dags.repositories[0].name=REPO-IDENTIFIER
git.dags.repositories[0].branch=master

If you use a private repository from GitHub, a possible option to clone the files is using a Personal Access Token and using it as part of the URL: https://USERNAME:PERSONAL_ACCESS_TOKEN@github.com/USERNAME/REPOSITORY

Loading Plugins

You can load plugins into the chart by specifying a git repository containing the plugin files. The repository will be periodically updated using a sidecar container. In order to do that, you can deploy airflow with the following options:

NOTE: When enabling git synchronization, an init container and sidecar container will be added for all the pods running airflow, this will allow scheduler, worker and web component to reach plugins if it was needed.

git.plugins.enabled=true
git.plugins.repositories[0].repository=https://github.com/teamclairvoyant/airflow-rest-api-plugin.git
git.plugins.repositories[0].branch=v1.0.9-branch
git.plugins.repositories[0].path=plugins

Existing Secrets

You can use an existing secret to configure your Airflow auth, external Postgres, and external Redis® passwords:

postgresql.enabled=false
externalDatabase.host=my.external.postgres.host
externalDatabase.user=bn_airflow
externalDatabase.database=bitnami_airflow
externalDatabase.existingSecret=all-my-secrets
externalDatabase.existingSecretPasswordKey=postgresql-password

redis.enabled=false
externalRedis.host=my.external.redis.host
externalRedis.existingSecret=all-my-secrets
externalRedis.existingSecretPasswordKey=redis-password

auth.existingSecret=all-my-secrets

The expected secret resource looks as follows:

apiVersion: v1
kind: Secret
metadata:
  name: all-my-secrets
type: Opaque
data:
  airflow-password: "Smo1QTJLdGxXMg=="
  airflow-fernet-key: "YVRZeVJVWnlXbU4wY1dOalVrdE1SV3cxWWtKeFIzWkVRVTVrVjNaTFR6WT0="
  airflow-secret-key: "a25mQ1FHTUh3MnFRSk5KMEIyVVU2YmN0VGRyYTVXY08="
  postgresql-password: "cG9zdGdyZXMK"
  redis-password: "cmVkaXMK"

This is useful if you plan on using Bitnami's sealed secrets to manage your passwords.

Setting Pod's affinity

This chart allows you to set your custom affinity using the affinity parameter. Find more information about Pod's affinity in the kubernetes documentation.

As an alternative, you can use of the preset configurations for pod affinity, pod anti-affinity, and node affinity available at the bitnami/common chart. To do so, set the podAffinityPreset, podAntiAffinityPreset, or nodeAffinityPreset parameters.

Install extra python packages

This chart allows you to mount volumes using extraVolumes and extraVolumeMounts in all 3 airflow components (web, scheduler, worker). Mounting a requirements.txt using these options to /bitnami/python/requirements.txt will execute pip install -r /bitnami/python/requirements.txt on container start.

Enabling network policies

This chart allows you to set network policies that will rectrict the access to the deployed pods in the cluster. Basically, no other pods apart from Scheduler's pods may access Worker's pods and no other pods apart from Web's pods may access Worker's ones. To do so, set networkPolicies.enabled=true.

Executors

Airflow supports different executors runtimes and this chart provides support for the following ones.

CeleryExecutor

Celery executor is the default value for this chart with it you can scale out the number of workers. To point the executor parameter to CeleryExecutor you need to do something, you just install the chart with default parameters.

KubernetesExecutor

The kubernetes executor is introduced in Apache Airflow 1.10.0. The Kubernetes executor will create a new pod for every task instance using the pod_template.yaml that you can find templates/config/configmap.yaml, otherwise you can override this template using worker.podTemplate. To enable KubernetesExecutor set the following parameters.

NOTE: Redis® is not needed to be deployed when using KubernetesExecutor so you must disable it using redis.enabled=false.

executor=KubernetesExecutor
redis.enabled=false
rbac.create=true
serviceaccount.create=true

CeleryKubernetesExecutor

The CeleryKubernetesExecutor is introduced in Airflow 2.0 and is a combination of both the Celery and the Kubernetes executors. Tasks will be executed using Celery by default, but those tasks that require it can be executed in a Kubernetes pod using the 'kubernetes' queue.

LocalExecutor

Local executor runs tasks by spawning processes in the Scheduler pods. To enable LocalExecutor set the following parameters.

executor=LocalExecutor
redis.enabled=false

LocalKubernetesExecutor

The LocalKubernetesExecutor is introduced in Airflow 2.3 and is a combination of both the Local and the Kubernetes executors. Tasks will be executed in the scheduler by default, but those tasks that require it can be executed in a Kubernetes pod using the 'kubernetes' queue.

SequentialExecutor

This executor will only run one task instance at a time in the Scheduler pods. For production use case, please use other executors. To enable SequentialExecutor set the following parameters.

executor=SequentialExecutor
redis.enabled=false

Scaling worker pods

Sometime when using large workloads a fixed number of worker pods may make task to take a long time to be executed. This chart provide two ways for scaling worker pods.

• If you are using KubernetesExecutor auto scaling pods would be done by the Scheduler without adding anything more.
• If you are using SequentialExecutor you would have to enable worker.autoscaling to do so, please, set the following parameters. It will use autoscaling by default configuration that you can change using worker.autoscaling.replicas.* and worker.autoscaling.targets.*.

worker.autoscaling.enabled=true
worker.resources.requests.cpu=200m
worker.resources.requests.memory=250Mi

Persistence

The Bitnami Airflow chart relies on the PostgreSQL chart persistence. This means that Airflow does not persist anything.

Troubleshooting

Find more information about how to deal with common errors related to Bitnami's Helm charts in this troubleshooting guide.

Upgrading

To 14.0.0

This major updates the PostgreSQL subchart to its newest major, 12.0.0. Here you can find more information about the changes introduced in that version.

To any previous version

Refer to the chart documentation for more information about how to upgrade from previous releases.

License

Copyright © 2023 Bitnami

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.