> ## Documentation Index > Fetch the complete documentation index at: https://docs.ankra.ai/llms.txt > Use this file to discover all available pages before exploring further. # Preview a promotion between two environments > What promoting the source environment's build into the target would do (ankra-ryfuy.38.4): the build that would move, what the target serves now, the deploy options that differ and stay as they are, the secrets check, the target's manifest-revision drift verdict, and every reason the promotion would be refused, with a fix path each. state is ready, already_current, blocked, or unknown when a read behind the verdict failed - never ready on a guess. Environment ids are the ids the environments read answers with. Held to the applications.deploy permission, as the write is; secrets.missing_keys is null unless the caller also holds applications.write, the env-secrets endpoints' permission. ## OpenAPI ````yaml https://platform.ankra.app/openapi.json get /org/applications/{application_id}/promotions/preview openapi: 3.1.0 info: title: FastAPI version: 0.1.0 servers: - url: https://platform.ankra.app security: [] tags: - name: Clusters description: Create, inspect and manage clusters, and the stacks deployed on them. - name: Managed Clusters description: Provider-managed control planes, driven through one common surface. - name: Imported Clusters description: Clusters that already existed and were connected to Ankra. - name: Cluster Access description: Kubeconfigs, service-account tokens and per-cluster access grants. - name: Kubernetes description: Read and act on the Kubernetes objects inside a cluster. - name: DigitalOcean Clusters description: Provision and manage DigitalOcean Kubernetes clusters. - name: Hetzner Clusters description: Provision and manage Hetzner Kubernetes clusters. - name: OVH Clusters description: Provision and manage OVH Kubernetes clusters. - name: Scaleway Clusters description: Provision and manage Scaleway Kapsule clusters. - name: UpCloud Clusters description: Provision and manage UpCloud Kubernetes clusters. - name: Applications description: Deploy, configure and observe applications across the fleet. - name: Stack Profiles description: Reusable stack definitions, their versions and sharing. - name: Charts description: Browse the chart catalogue behind stacks and addons. - name: Helm description: Helm registries, credentials and the charts they expose. - name: Executions description: Long-running platform executions and their jobs. - name: Operations description: Cancel in-flight cluster operations and their jobs. - name: Chat description: Conversational sessions, plans and confirmable actions. - name: AI Agent Runs description: Autonomous agent runs and their outcomes. - name: AI Tickets description: The AI ticket board, its sync connections and settings. - name: AI Playbooks description: Reusable playbooks the AI lanes execute. - name: AI Conditions description: Conditions that gate AI autonomy. - name: AI Engineering Handoffs description: Work the AI lanes escalate to a human engineer. - name: AI Environment description: The environment and base stacks AI demos deploy into. - name: Security description: Findings, advisories, SBOMs, compliance and posture. - name: Cost description: Cluster and fleet cost, rate cards and cost settings. - name: Billing description: Subscription and spend caps. - name: Organisation description: Members, invitations, audit logs and organisation settings. - name: Account Tokens description: Personal access tokens for the API and CLI. - name: Credentials description: The shared credential store. - name: Azure Credentials description: Azure credentials and SSH keys. - name: DigitalOcean Credentials description: DigitalOcean credentials and SSH keys. - name: Hetzner Credentials description: Hetzner credentials and SSH keys. - name: OVH Credentials description: OVH credentials and SSH keys. - name: Scaleway Credentials description: Scaleway credentials. - name: UpCloud Credentials description: UpCloud credentials and SSH keys. - name: Data Source Credentials description: Credentials for metrics and log sources. - name: DNS Credentials description: Credentials for DNS providers. - name: DNS description: DNS zones and records, including custom organisation zones. - name: Cloudflare description: Cloudflare domains and the credentials behind them. - name: Variables description: Organisation- and cluster-scoped variables. - name: SOPS description: Encrypt and decrypt values with the organisation SOPS config. - name: Alerts description: Alert integrations and ingest credentials. - name: Notifications description: Notification routes and their delivery targets. - name: Support description: Support tickets. paths: /org/applications/{application_id}/promotions/preview: get: tags: - Applications summary: Preview a promotion between two environments description: >- What promoting the source environment's build into the target would do (ankra-ryfuy.38.4): the build that would move, what the target serves now, the deploy options that differ and stay as they are, the secrets check, the target's manifest-revision drift verdict, and every reason the promotion would be refused, with a fix path each. state is ready, already_current, blocked, or unknown when a read behind the verdict failed - never ready on a guess. Environment ids are the ids the environments read answers with. Held to the applications.deploy permission, as the write is; secrets.missing_keys is null unless the caller also holds applications.write, the env-secrets endpoints' permission. operationId: preview_application_promotion parameters: - in: path name: application_id required: true schema: type: string title: Application Id - in: query name: source_environment_id required: true schema: title: Source Environment Id type: string - in: query name: target_environment_id required: true schema: title: Target Environment Id type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/ApplicationPromotionPreview' description: Successful Response '403': content: application/json: schema: $ref: '#/components/schemas/DemoDetailError' description: The caller may not deploy this application. '404': content: application/json: schema: $ref: '#/components/schemas/DemoDetailError' description: Not found ("Application not found" or "Environment not found") '422': content: application/json: schema: $ref: '#/components/schemas/DemoDetailError' description: '"Source and target environments must differ."' components: schemas: ApplicationPromotionPreview: description: >- The confirmation's data: what would move, what the target serves now, what differs and stays, and every reason the promotion would be refused. Three-valued throughout. properties: application_id: type: string read_state: type: string enum: - ok - unknown read_reason: type: string state: type: string enum: - ready - already_current - blocked - unknown description: >- unknown when a read behind the verdict failed (read_reason names it) - never ready. source: anyOf: - $ref: '#/components/schemas/ApplicationPromotionPreviewSource' - type: 'null' target: anyOf: - $ref: '#/components/schemas/ApplicationPromotionPreviewTarget' - type: 'null' blockers: items: $ref: '#/components/schemas/ApplicationPromotionBlocker' type: array secrets: anyOf: - $ref: '#/components/schemas/ApplicationPromotionSecrets' - type: 'null' config_differences: items: $ref: '#/components/schemas/ApplicationPromotionConfigDifference' type: array required: - application_id - read_state - read_reason - state - source - target - blockers - secrets - config_differences title: ApplicationPromotionPreview type: object DemoDetailError: description: >- The FastAPI-style detail envelope the demo routes use for 400/403/404/409/502 responses. properties: detail: type: string required: - detail type: object ApplicationPromotionPreviewSource: description: >- What the source environment runs. image_tag and commit_sha are null when its installations disagree or carry none - never "". properties: id: type: string name: type: string role: type: string image_tag: anyOf: - type: string - type: 'null' commit_sha: anyOf: - type: string - type: 'null' status: type: string description: >- The least-proven installation status across the environment: healthy only when every installation is. required: - id - name - role - image_tag - commit_sha - status title: ApplicationPromotionPreviewSource type: object ApplicationPromotionPreviewTarget: description: What the target environment runs now and how it is updated. properties: id: type: string name: type: string role: type: string image_tag: anyOf: - type: string - type: 'null' commit_sha: anyOf: - type: string - type: 'null' status: type: string follows: type: string enum: - pushes - manual - unknown drift: type: string enum: - in_sync - drifted - not_applicable - unknown description: The manifest-revision verdict on the target's first installation. required: - id - name - role - image_tag - commit_sha - status - follows - drift title: ApplicationPromotionPreviewTarget type: object ApplicationPromotionBlocker: description: One reason the promotion would be refused. properties: reason: type: string enum: - source_not_proven - source_tag_unknown - source_not_settled - target_follows_pushes - target_follows_unknown - target_deploy_in_flight - secrets_missing detail: type: string description: The frozen sentence; the POST's 409 detail is this text verbatim. fix_path: type: string enum: - none - settings - secrets - deployments required: - reason - detail - fix_path title: ApplicationPromotionBlocker type: object ApplicationPromotionSecrets: properties: state: type: string enum: - known - unknown missing_keys: anyOf: - items: type: string type: array - type: 'null' description: >- Required keys with no value catalogued. A claim only under state "known"; empty under "unknown" because nothing could be checked, not because nothing is missing; null when the caller may not read the secret catalogue (applications.write, the env-secrets endpoints' permission) - the blocker still says keys are missing, never which. target_apply_state: type: string description: >- applied | pending | unknown for the target's installations. Informative: the deploy a promotion enqueues seals the catalogue's current values itself. required: - state - missing_keys - target_apply_state title: ApplicationPromotionSecrets type: object ApplicationPromotionConfigDifference: description: >- One deploy option the two environments set differently. It stays as it is in the target; the preview only names it. An absent key renders as "". properties: key: type: string source_value: type: string target_value: type: string required: - key - source_value - target_value title: ApplicationPromotionConfigDifference type: object ````