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Grafana

Usage example

??? example ```yaml apiVersion: aiven.io/v1alpha1 kind: Grafana metadata: name: my-grafana spec: authSecretRef: name: aiven-token key: token

  connInfoSecretTarget:
    name: grafana-secret
    prefix: MY_SECRET_PREFIX_
    annotations:
      foo: bar
    labels:
      baz: egg

  project: my-aiven-project
  cloudName: google-europe-west1
  plan: startup-1

  maintenanceWindowDow: sunday
  maintenanceWindowTime: 11:00:00

  userConfig:
    public_access:
      grafana: true
    ip_filter:
      - network: 0.0.0.0
        description: whatever
      - network: 10.20.0.0/16
```

Grafana {: #Grafana }

Grafana is the Schema for the grafanas API.

!!! Info "Exposes secret keys"

`GRAFANA_HOST`, `GRAFANA_PORT`, `GRAFANA_USER`, `GRAFANA_PASSWORD`, `GRAFANA_URI`, `GRAFANA_HOSTS`.

Required

  • apiVersion{: name='apiVersion-property'} (string). Value aiven.io/v1alpha1.
  • kind{: name='kind-property'} (string). Value Grafana.
  • metadata{: name='metadata-property'} (object). Data that identifies the object, including a name string and optional namespace.
  • spec{: name='spec-property'} (object). GrafanaSpec defines the desired state of Grafana. See below for nested schema.

spec {: #spec }

Appears on Grafana.

GrafanaSpec defines the desired state of Grafana.

Required

  • plan{: name='spec.plan-property'} (string, MaxLength: 128). Subscription plan.
  • project{: name='spec.project-property'} (string, Immutable, MaxLength: 63, Format: ^[a-zA-Z0-9_-]+$). Identifies the project this resource belongs to.

Optional

  • authSecretRef{: name='spec.authSecretRef-property'} (object). Authentication reference to Aiven token in a secret. See below for nested schema.
  • cloudName{: name='spec.cloudName-property'} (string, MaxLength: 256). Cloud the service runs in.
  • connInfoSecretTarget{: name='spec.connInfoSecretTarget-property'} (object). Secret configuration. See below for nested schema.
  • connInfoSecretTargetDisabled{: name='spec.connInfoSecretTargetDisabled-property'} (boolean, Immutable). When true, the secret containing connection information will not be created, defaults to false. This field cannot be changed after resource creation.
  • disk_space{: name='spec.disk_space-property'} (string, Format: ^[1-9][0-9]*(GiB|G)*). The disk space of the service, possible values depend on the service type, the cloud provider and the project. Reducing will result in the service re-balancing.
  • maintenanceWindowDow{: name='spec.maintenanceWindowDow-property'} (string, Enum: monday, tuesday, wednesday, thursday, friday, saturday, sunday). Day of week when maintenance operations should be performed. One monday, tuesday, wednesday, etc.
  • maintenanceWindowTime{: name='spec.maintenanceWindowTime-property'} (string, MaxLength: 8). Time of day when maintenance operations should be performed. UTC time in HH:mm:ss format.
  • projectVPCRef{: name='spec.projectVPCRef-property'} (object). ProjectVPCRef reference to ProjectVPC resource to use its ID as ProjectVPCID automatically. See below for nested schema.
  • projectVpcId{: name='spec.projectVpcId-property'} (string, MaxLength: 36). Identifier of the VPC the service should be in, if any.
  • serviceIntegrations{: name='spec.serviceIntegrations-property'} (array of objects, Immutable, MaxItems: 1). Service integrations to specify when creating a service. Not applied after initial service creation. See below for nested schema.
  • tags{: name='spec.tags-property'} (object, AdditionalProperties: string). Tags are key-value pairs that allow you to categorize services.
  • technicalEmails{: name='spec.technicalEmails-property'} (array of objects, MaxItems: 10). Defines the email addresses that will receive alerts about upcoming maintenance updates or warnings about service instability. See below for nested schema.
  • terminationProtection{: name='spec.terminationProtection-property'} (boolean). Prevent service from being deleted. It is recommended to have this enabled for all services.
  • userConfig{: name='spec.userConfig-property'} (object). Cassandra specific user configuration options. See below for nested schema.

authSecretRef {: #spec.authSecretRef }

Appears on spec.

Authentication reference to Aiven token in a secret.

Required

  • key{: name='spec.authSecretRef.key-property'} (string, MinLength: 1).
  • name{: name='spec.authSecretRef.name-property'} (string, MinLength: 1).

connInfoSecretTarget {: #spec.connInfoSecretTarget }

Appears on spec.

Secret configuration.

Required

  • name{: name='spec.connInfoSecretTarget.name-property'} (string). Name of the secret resource to be created. By default, it is equal to the resource name.

Optional

  • annotations{: name='spec.connInfoSecretTarget.annotations-property'} (object, AdditionalProperties: string). Annotations added to the secret.
  • labels{: name='spec.connInfoSecretTarget.labels-property'} (object, AdditionalProperties: string). Labels added to the secret.
  • prefix{: name='spec.connInfoSecretTarget.prefix-property'} (string). Prefix for the secret's keys. Added "as is" without any transformations. By default, is equal to the kind name in uppercase + underscore, e.g. KAFKA_, REDIS_, etc.

projectVPCRef {: #spec.projectVPCRef }

Appears on spec.

ProjectVPCRef reference to ProjectVPC resource to use its ID as ProjectVPCID automatically.

Required

  • name{: name='spec.projectVPCRef.name-property'} (string, MinLength: 1).

Optional

  • namespace{: name='spec.projectVPCRef.namespace-property'} (string, MinLength: 1).

serviceIntegrations {: #spec.serviceIntegrations }

Appears on spec.

Service integrations to specify when creating a service. Not applied after initial service creation.

Required

  • integrationType{: name='spec.serviceIntegrations.integrationType-property'} (string, Enum: read_replica).
  • sourceServiceName{: name='spec.serviceIntegrations.sourceServiceName-property'} (string, MinLength: 1, MaxLength: 64).

technicalEmails {: #spec.technicalEmails }

Appears on spec.

Defines the email addresses that will receive alerts about upcoming maintenance updates or warnings about service instability.

Required

  • email{: name='spec.technicalEmails.email-property'} (string, Format: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$). Email address.

userConfig {: #spec.userConfig }

Appears on spec.

Cassandra specific user configuration options.

Optional

  • additional_backup_regions{: name='spec.userConfig.additional_backup_regions-property'} (array of strings, MaxItems: 1). Additional Cloud Regions for Backup Replication.
  • alerting_enabled{: name='spec.userConfig.alerting_enabled-property'} (boolean). Enable or disable Grafana legacy alerting functionality. This should not be enabled with unified_alerting_enabled.
  • alerting_error_or_timeout{: name='spec.userConfig.alerting_error_or_timeout-property'} (string, Enum: alerting, keep_state). Default error or timeout setting for new alerting rules.
  • alerting_max_annotations_to_keep{: name='spec.userConfig.alerting_max_annotations_to_keep-property'} (integer, Minimum: 0, Maximum: 1000000). Max number of alert annotations that Grafana stores. 0 (default) keeps all alert annotations.
  • alerting_nodata_or_nullvalues{: name='spec.userConfig.alerting_nodata_or_nullvalues-property'} (string, Enum: alerting, no_data, keep_state, ok). Default value for 'no data or null values' for new alerting rules.
  • allow_embedding{: name='spec.userConfig.allow_embedding-property'} (boolean). Allow embedding Grafana dashboards with iframe/frame/object/embed tags. Disabled by default to limit impact of clickjacking.
  • auth_azuread{: name='spec.userConfig.auth_azuread-property'} (object). Azure AD OAuth integration. See below for nested schema.
  • auth_basic_enabled{: name='spec.userConfig.auth_basic_enabled-property'} (boolean). Enable or disable basic authentication form, used by Grafana built-in login.
  • auth_generic_oauth{: name='spec.userConfig.auth_generic_oauth-property'} (object). Generic OAuth integration. See below for nested schema.
  • auth_github{: name='spec.userConfig.auth_github-property'} (object). Github Auth integration. See below for nested schema.
  • auth_gitlab{: name='spec.userConfig.auth_gitlab-property'} (object). GitLab Auth integration. See below for nested schema.
  • auth_google{: name='spec.userConfig.auth_google-property'} (object). Google Auth integration. See below for nested schema.
  • cookie_samesite{: name='spec.userConfig.cookie_samesite-property'} (string, Enum: lax, strict, none). Cookie SameSite attribute: strict prevents sending cookie for cross-site requests, effectively disabling direct linking from other sites to Grafana. lax is the default value.
  • custom_domain{: name='spec.userConfig.custom_domain-property'} (string, MaxLength: 255). Serve the web frontend using a custom CNAME pointing to the Aiven DNS name.
  • dashboard_previews_enabled{: name='spec.userConfig.dashboard_previews_enabled-property'} (boolean). This feature is new in Grafana 9 and is quite resource intensive. It may cause low-end plans to work more slowly while the dashboard previews are rendering.
  • dashboards_min_refresh_interval{: name='spec.userConfig.dashboards_min_refresh_interval-property'} (string, Pattern: ^[0-9]+(ms|s|m|h|d)$, MaxLength: 16). Signed sequence of decimal numbers, followed by a unit suffix (ms, s, m, h, d), e.g. 30s, 1h.
  • dashboards_versions_to_keep{: name='spec.userConfig.dashboards_versions_to_keep-property'} (integer, Minimum: 1, Maximum: 100). Dashboard versions to keep per dashboard.
  • dataproxy_send_user_header{: name='spec.userConfig.dataproxy_send_user_header-property'} (boolean). Send X-Grafana-User header to data source.
  • dataproxy_timeout{: name='spec.userConfig.dataproxy_timeout-property'} (integer, Minimum: 15, Maximum: 90). Timeout for data proxy requests in seconds.
  • date_formats{: name='spec.userConfig.date_formats-property'} (object). Grafana date format specifications. See below for nested schema.
  • disable_gravatar{: name='spec.userConfig.disable_gravatar-property'} (boolean). Set to true to disable gravatar. Defaults to false (gravatar is enabled).
  • editors_can_admin{: name='spec.userConfig.editors_can_admin-property'} (boolean). Editors can manage folders, teams and dashboards created by them.
  • external_image_storage{: name='spec.userConfig.external_image_storage-property'} (object). External image store settings. See below for nested schema.
  • google_analytics_ua_id{: name='spec.userConfig.google_analytics_ua_id-property'} (string, Pattern: ^(G|UA|YT|MO)-[a-zA-Z0-9-]+$, MaxLength: 64). Google Analytics ID.
  • ip_filter{: name='spec.userConfig.ip_filter-property'} (array of objects, MaxItems: 1024). Allow incoming connections from CIDR address block, e.g. 10.20.0.0/16. See below for nested schema.
  • metrics_enabled{: name='spec.userConfig.metrics_enabled-property'} (boolean). Enable Grafana /metrics endpoint.
  • oauth_allow_insecure_email_lookup{: name='spec.userConfig.oauth_allow_insecure_email_lookup-property'} (boolean). Enforce user lookup based on email instead of the unique ID provided by the IdP.
  • private_access{: name='spec.userConfig.private_access-property'} (object). Allow access to selected service ports from private networks. See below for nested schema.
  • privatelink_access{: name='spec.userConfig.privatelink_access-property'} (object). Allow access to selected service components through Privatelink. See below for nested schema.
  • project_to_fork_from{: name='spec.userConfig.project_to_fork_from-property'} (string, Immutable, Pattern: ^[a-z][-a-z0-9]{0,63}$|^$, MaxLength: 63). Name of another project to fork a service from. This has effect only when a new service is being created.
  • public_access{: name='spec.userConfig.public_access-property'} (object). Allow access to selected service ports from the public Internet. See below for nested schema.
  • recovery_basebackup_name{: name='spec.userConfig.recovery_basebackup_name-property'} (string, Pattern: ^[a-zA-Z0-9-_:.]+$, MaxLength: 128). Name of the basebackup to restore in forked service.
  • service_log{: name='spec.userConfig.service_log-property'} (boolean). Store logs for the service so that they are available in the HTTP API and console.
  • service_to_fork_from{: name='spec.userConfig.service_to_fork_from-property'} (string, Immutable, Pattern: ^[a-z][-a-z0-9]{0,63}$|^$, MaxLength: 64). Name of another service to fork from. This has effect only when a new service is being created.
  • smtp_server{: name='spec.userConfig.smtp_server-property'} (object). SMTP server settings. See below for nested schema.
  • static_ips{: name='spec.userConfig.static_ips-property'} (boolean). Use static public IP addresses.
  • unified_alerting_enabled{: name='spec.userConfig.unified_alerting_enabled-property'} (boolean). Enable or disable Grafana unified alerting functionality. By default this is enabled and any legacy alerts will be migrated on upgrade to Grafana 9+. To stay on legacy alerting, set unified_alerting_enabled to false and alerting_enabled to true. See https://grafana.com/docs/grafana/latest/alerting/set-up/migrating-alerts/ for more details.
  • user_auto_assign_org{: name='spec.userConfig.user_auto_assign_org-property'} (boolean). Auto-assign new users on signup to main organization. Defaults to false.
  • user_auto_assign_org_role{: name='spec.userConfig.user_auto_assign_org_role-property'} (string, Enum: Viewer, Admin, Editor). Set role for new signups. Defaults to Viewer.
  • viewers_can_edit{: name='spec.userConfig.viewers_can_edit-property'} (boolean). Users with view-only permission can edit but not save dashboards.

auth_azuread {: #spec.userConfig.auth_azuread }

Appears on spec.userConfig.

Azure AD OAuth integration.

Required

  • auth_url{: name='spec.userConfig.auth_azuread.auth_url-property'} (string, MaxLength: 2048). Authorization URL.
  • client_id{: name='spec.userConfig.auth_azuread.client_id-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client ID from provider.
  • client_secret{: name='spec.userConfig.auth_azuread.client_secret-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client secret from provider.
  • token_url{: name='spec.userConfig.auth_azuread.token_url-property'} (string, MaxLength: 2048). Token URL.

Optional

  • allow_sign_up{: name='spec.userConfig.auth_azuread.allow_sign_up-property'} (boolean). Automatically sign-up users on successful sign-in.
  • allowed_domains{: name='spec.userConfig.auth_azuread.allowed_domains-property'} (array of strings, MaxItems: 50). Allowed domains.
  • allowed_groups{: name='spec.userConfig.auth_azuread.allowed_groups-property'} (array of strings, MaxItems: 50). Require users to belong to one of given groups.

auth_generic_oauth {: #spec.userConfig.auth_generic_oauth }

Appears on spec.userConfig.

Generic OAuth integration.

Required

  • api_url{: name='spec.userConfig.auth_generic_oauth.api_url-property'} (string, MaxLength: 2048). API URL.
  • auth_url{: name='spec.userConfig.auth_generic_oauth.auth_url-property'} (string, MaxLength: 2048). Authorization URL.
  • client_id{: name='spec.userConfig.auth_generic_oauth.client_id-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client ID from provider.
  • client_secret{: name='spec.userConfig.auth_generic_oauth.client_secret-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client secret from provider.
  • token_url{: name='spec.userConfig.auth_generic_oauth.token_url-property'} (string, MaxLength: 2048). Token URL.

Optional

  • allow_sign_up{: name='spec.userConfig.auth_generic_oauth.allow_sign_up-property'} (boolean). Automatically sign-up users on successful sign-in.
  • allowed_domains{: name='spec.userConfig.auth_generic_oauth.allowed_domains-property'} (array of strings, MaxItems: 50). Allowed domains.
  • allowed_organizations{: name='spec.userConfig.auth_generic_oauth.allowed_organizations-property'} (array of strings, MaxItems: 50). Require user to be member of one of the listed organizations.
  • auto_login{: name='spec.userConfig.auth_generic_oauth.auto_login-property'} (boolean). Allow users to bypass the login screen and automatically log in.
  • name{: name='spec.userConfig.auth_generic_oauth.name-property'} (string, Pattern: ^[a-zA-Z0-9_\- ]+$, MaxLength: 128). Name of the OAuth integration.
  • scopes{: name='spec.userConfig.auth_generic_oauth.scopes-property'} (array of strings, MaxItems: 50). OAuth scopes.

auth_github {: #spec.userConfig.auth_github }

Appears on spec.userConfig.

Github Auth integration.

Required

  • client_id{: name='spec.userConfig.auth_github.client_id-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client ID from provider.
  • client_secret{: name='spec.userConfig.auth_github.client_secret-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client secret from provider.

Optional

  • allow_sign_up{: name='spec.userConfig.auth_github.allow_sign_up-property'} (boolean). Automatically sign-up users on successful sign-in.
  • allowed_organizations{: name='spec.userConfig.auth_github.allowed_organizations-property'} (array of strings, MaxItems: 50). Require users to belong to one of given organizations.
  • auto_login{: name='spec.userConfig.auth_github.auto_login-property'} (boolean). Allow users to bypass the login screen and automatically log in.
  • skip_org_role_sync{: name='spec.userConfig.auth_github.skip_org_role_sync-property'} (boolean). Stop automatically syncing user roles.
  • team_ids{: name='spec.userConfig.auth_github.team_ids-property'} (array of integers, MaxItems: 50). Require users to belong to one of given team IDs.

auth_gitlab {: #spec.userConfig.auth_gitlab }

Appears on spec.userConfig.

GitLab Auth integration.

Required

  • allowed_groups{: name='spec.userConfig.auth_gitlab.allowed_groups-property'} (array of strings, MaxItems: 50). Require users to belong to one of given groups.
  • client_id{: name='spec.userConfig.auth_gitlab.client_id-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client ID from provider.
  • client_secret{: name='spec.userConfig.auth_gitlab.client_secret-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client secret from provider.

Optional

  • allow_sign_up{: name='spec.userConfig.auth_gitlab.allow_sign_up-property'} (boolean). Automatically sign-up users on successful sign-in.
  • api_url{: name='spec.userConfig.auth_gitlab.api_url-property'} (string, MaxLength: 2048). API URL. This only needs to be set when using self hosted GitLab.
  • auth_url{: name='spec.userConfig.auth_gitlab.auth_url-property'} (string, MaxLength: 2048). Authorization URL. This only needs to be set when using self hosted GitLab.
  • token_url{: name='spec.userConfig.auth_gitlab.token_url-property'} (string, MaxLength: 2048). Token URL. This only needs to be set when using self hosted GitLab.

auth_google {: #spec.userConfig.auth_google }

Appears on spec.userConfig.

Google Auth integration.

Required

  • allowed_domains{: name='spec.userConfig.auth_google.allowed_domains-property'} (array of strings, MaxItems: 64). Domains allowed to sign-in to this Grafana.
  • client_id{: name='spec.userConfig.auth_google.client_id-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client ID from provider.
  • client_secret{: name='spec.userConfig.auth_google.client_secret-property'} (string, Pattern: ^[\040-\176]+$, MaxLength: 1024). Client secret from provider.

Optional

  • allow_sign_up{: name='spec.userConfig.auth_google.allow_sign_up-property'} (boolean). Automatically sign-up users on successful sign-in.

date_formats {: #spec.userConfig.date_formats }

Appears on spec.userConfig.

Grafana date format specifications.

Optional

  • default_timezone{: name='spec.userConfig.date_formats.default_timezone-property'} (string, MaxLength: 64). Default time zone for user preferences. Value browser uses browser local time zone.
  • full_date{: name='spec.userConfig.date_formats.full_date-property'} (string, MaxLength: 128). Moment.js style format string for cases where full date is shown.
  • interval_day{: name='spec.userConfig.date_formats.interval_day-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring day accuracy is shown.
  • interval_hour{: name='spec.userConfig.date_formats.interval_hour-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring hour accuracy is shown.
  • interval_minute{: name='spec.userConfig.date_formats.interval_minute-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring minute accuracy is shown.
  • interval_month{: name='spec.userConfig.date_formats.interval_month-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring month accuracy is shown.
  • interval_second{: name='spec.userConfig.date_formats.interval_second-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring second accuracy is shown.
  • interval_year{: name='spec.userConfig.date_formats.interval_year-property'} (string, MaxLength: 128). Moment.js style format string used when a time requiring year accuracy is shown.

external_image_storage {: #spec.userConfig.external_image_storage }

Appears on spec.userConfig.

External image store settings.

Required

  • access_key{: name='spec.userConfig.external_image_storage.access_key-property'} (string, Pattern: ^[A-Z0-9]+$, MaxLength: 4096). S3 access key. Requires permissions to the S3 bucket for the s3:PutObject and s3:PutObjectAcl actions.
  • bucket_url{: name='spec.userConfig.external_image_storage.bucket_url-property'} (string, MaxLength: 2048). Bucket URL for S3.
  • provider{: name='spec.userConfig.external_image_storage.provider-property'} (string, Enum: s3). Provider type.
  • secret_key{: name='spec.userConfig.external_image_storage.secret_key-property'} (string, Pattern: ^[A-Za-z0-9/+=]+$, MaxLength: 4096). S3 secret key.

ip_filter {: #spec.userConfig.ip_filter }

Appears on spec.userConfig.

Allow incoming connections from CIDR address block, e.g. 10.20.0.0/16.

Required

  • network{: name='spec.userConfig.ip_filter.network-property'} (string, MaxLength: 43). CIDR address block.

Optional

  • description{: name='spec.userConfig.ip_filter.description-property'} (string, MaxLength: 1024). Description for IP filter list entry.

private_access {: #spec.userConfig.private_access }

Appears on spec.userConfig.

Allow access to selected service ports from private networks.

Required

  • grafana{: name='spec.userConfig.private_access.grafana-property'} (boolean). Allow clients to connect to grafana with a DNS name that always resolves to the service's private IP addresses. Only available in certain network locations.

privatelink_access {: #spec.userConfig.privatelink_access }

Appears on spec.userConfig.

Allow access to selected service components through Privatelink.

Required

  • grafana{: name='spec.userConfig.privatelink_access.grafana-property'} (boolean). Enable grafana.

public_access {: #spec.userConfig.public_access }

Appears on spec.userConfig.

Allow access to selected service ports from the public Internet.

Required

  • grafana{: name='spec.userConfig.public_access.grafana-property'} (boolean). Allow clients to connect to grafana from the public internet for service nodes that are in a project VPC or another type of private network.

smtp_server {: #spec.userConfig.smtp_server }

Appears on spec.userConfig.

SMTP server settings.

Required

  • from_address{: name='spec.userConfig.smtp_server.from_address-property'} (string, MaxLength: 319). Address used for sending emails.
  • host{: name='spec.userConfig.smtp_server.host-property'} (string, MaxLength: 255). Server hostname or IP.
  • port{: name='spec.userConfig.smtp_server.port-property'} (integer, Minimum: 1, Maximum: 65535). SMTP server port.

Optional

  • from_name{: name='spec.userConfig.smtp_server.from_name-property'} (string, Pattern: ^[^\x00-\x1F]+$, MaxLength: 128). Name used in outgoing emails, defaults to Grafana.
  • password{: name='spec.userConfig.smtp_server.password-property'} (string, Pattern: ^[^\x00-\x1F]+$, MaxLength: 255). Password for SMTP authentication.
  • skip_verify{: name='spec.userConfig.smtp_server.skip_verify-property'} (boolean). Skip verifying server certificate. Defaults to false.
  • starttls_policy{: name='spec.userConfig.smtp_server.starttls_policy-property'} (string, Enum: OpportunisticStartTLS, MandatoryStartTLS, NoStartTLS). Either OpportunisticStartTLS, MandatoryStartTLS or NoStartTLS. Default is OpportunisticStartTLS.
  • username{: name='spec.userConfig.smtp_server.username-property'} (string, Pattern: ^[^\x00-\x1F]+$, MaxLength: 255). Username for SMTP authentication.