{"catalogRevision":"cat_f13ab9a494120b5e","recipeId":"page:migrate:cloudfront-distribution:cache-policy-by-content","recipeRevision":"r1","canonicalPath":"/migrate/cloudfront-distribution/cache-policy-by-content","label":"Migrate CloudFront distribution: Cache policy by content","family":"Migration guide","summary":"Move CDN delivery from CloudFront distribution to Ample, one component at a time. Destination verified on Ample: an immutable versioned asset and a mutable latest pointer stored with different Cache-Control headers in a published bucket, each served from the CDN URL with the header exactly as stored. Source procedure: Record the distribution's origins, cache behaviors, TTLs and the object keys the app references. Not migrated automatically: CloudFront cache behaviors, Lambda@Edge and CloudFront Functions, signed URLs and custom TTLs are not migrated; Ample verifies delivery of published bucket objects only. Cutover: Redeploy the app with the new asset base URL, verify delivery from the CDN URL, keep the distribution until confirmed, then disable it. Rollback: keep the source untouched until you confirm; nothing at the source is changed or deleted by this guide.","representativeQueries":["Migrate CloudFront distribution: Cache policy by content","Where can I host Cache policy by content?","I need a component-scoped export/import or reconfiguration procedure for Cache policy by content, with compatibility checks, verification and rollback."],"breadcrumbIds":["discovery","migration","migration:object-and-cdn-sources","migration:cloudfront-distribution","page:migrate:cloudfront-distribution:cache-policy-by-content"],"breadcrumbs":[{"id":"discovery","label":"Agent hosting discovery","canonicalPath":"/discover/discovery","kind":"root"},{"id":"migration","label":"Migration sources by component","canonicalPath":"/discover/migration","kind":"facet"},{"id":"migration:object-and-cdn-sources","label":"Object and CDN sources","canonicalPath":"/discover/migration/object-and-cdn-sources","kind":"group"},{"id":"migration:cloudfront-distribution","label":"CloudFront distribution","canonicalPath":"/discover/migration/cloudfront-distribution","kind":"atom"},{"id":"page:migrate:cloudfront-distribution:cache-policy-by-content","label":"Migrate CloudFront distribution: Cache policy by content","canonicalPath":"/migrate/cloudfront-distribution/cache-policy-by-content","kind":"recipe"}],"parentIds":["migration:cloudfront-distribution","pattern:cache-policy-by-content","intent:migrate-cdn"],"parents":[{"id":"migration:cloudfront-distribution","label":"CloudFront distribution","canonicalPath":"/discover/migration/cloudfront-distribution","kind":"atom"},{"id":"pattern:cache-policy-by-content","label":"Cache policy by content","canonicalPath":"/discover/pattern/cache-policy-by-content","kind":"atom"},{"id":"intent:migrate-cdn","label":"Migrate CDN","canonicalPath":"/discover/intent/migrate-cdn","kind":"atom"}],"resourceRequirements":["primitive:cdn"],"infrastructureRequirements":[{"primitiveId":"primitive:cdn","label":"CDN","canonicalPath":"/discover/primitive/cdn","status":"verified","summary":"The CDN host serves objects from published buckets. It does not front app compute and is not a cache or key-value store."}],"workload":"Cache policy by content","migrationSource":"CloudFront distribution","releaseStatus":"published","supportStatus":"verified","executionStatus":"unbound","docsOnly":true,"prerequisites":["Authorized access to the CloudFront distribution source and its export tooling","An inventory of every component in scope and out of scope","A validated backup or copy before any cutover","An Ample account token with servers:write, buckets:write"],"testedConfiguration":{"template":"node-22","runtime":"node","size":"s-1vcpu-1gb","install":"npm install","build":"npm run build --if-present","start":"npm run start"},"inputSchema":null,"outputSchema":null,"workflowSteps":[{"title":"Inventory the source","body":"List what CloudFront distribution provides beyond the component you are moving. Out of scope here: CloudFront cache behaviors, Lambda@Edge and CloudFront Functions, signed URLs and custom TTLs are not migrated; Ample verifies delivery of published bucket objects only."},{"title":"Source step 1","body":"Record the distribution's origins, cache behaviors, TTLs and the object keys the app references"},{"title":"Source step 2","body":"Copy the public assets into a published Ample bucket under versioned keys with immutable Cache-Control"},{"title":"Source step 3","body":"Update the app to build asset URLs from the Ample public URL"},{"title":"Publish the destination bucket","body":"Create and publish the asset bucket, upload versioned assets with immutable Cache-Control, and point the app at the public URL.","command":"ample bucket publish <bucket-name>"},{"title":"Validate before cutover","body":"Run the app's own checks and, for data, compare counts and checksums; the example checks are the pattern self-tests (/p/cache-policy-by-content)."},{"title":"Cut over","body":"Redeploy the app with the new asset base URL, verify delivery from the CDN URL, keep the distribution until confirmed, then disable it."},{"title":"Rollback","body":"Point DNS or configuration back to the source. The source was never modified; deletion is a separate, user-executed step after validation."}],"examples":[{"title":"Next.js pattern fixture (destination)","description":"Verified destination basis: cache policy by content.","sourceRef":"tests/deploy-canaries/next-js-patterns"}],"successChecks":[{"description":"destination app responds on its public URL","kind":"http_get","path":"/","expect":"ample canary next js patterns"},{"description":"cache-policy-by-content check from the destination example","kind":"http_get","path":"/p/cache-policy-by-content","expect":"see the pattern fixture checks"},{"description":"data or object counts and checksums match the source","kind":"manual","expect":"operator comparison before cutover"}],"limitations":["Documentation only: nothing is executed automatically and no execution binding is offered.","The source-side procedure is documented from CloudFront distribution's standard tooling and was not executed in this catalog's evidence; the destination side was verified with the pattern fixture.","No full source-product parity is claimed: CloudFront cache behaviors, Lambda@Edge and CloudFront Functions, signed URLs and custom TTLs are not migrated; Ample verifies delivery of published bucket objects only.","Verified on the node-22 template at s-1vcpu-1gb; region, compliance and request-duration limits are unknown.","PutObject and GetObject with path-style addressing are verified; bulk copy tooling and other S3 operations are not."],"costEstimate":{"currency":"USD","monthlyAmount":5.0,"authoritative":true,"basis":"size prices from pricing.toml (loaded by the API) at build revision 115ee02ebdf5c12b2d74e3064d4a52b3b1102944","components":[{"name":"app server","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":5.0}],"note":"Destination always-on monthly price of the tested sizes; apps auto-pause when idle. Source costs are unknown to Ample."},"evidenceSummary":[{"kind":"canary_run","summary":"Destination side verified: the Next.js pattern fixture deployed on Ample (next build then next start -H 0.0.0.0 -p $PORT on the node-22 template) and its checks passed (an immutable versioned asset and a mutable latest pointer stored with different Cache-Control headers in a published bucket, each served from the CDN URL with the header exactly as stored). The source-side export from CloudFront distribution is documented from the vendor's standard tooling and was not executed by this catalog's evidence.","observedAt":"2026-09-21T02:34:39Z","implementationRevision":"1d28ae0 (CLI 0.1.21)","expiresAt":"2027-03-20T02:34:39Z","scope":{"checks":["/p/cache-policy-by-content"],"destinationOnly":true,"template":"node-22"}}],"lastVerifiedAt":"2026-09-21T02:34:39Z","mcpBinding":null,"unknowns":["region availability is unknown until a verified region fact is recorded","compliance attestations are unknown; none are claimed"],"formats":{"html":"https://ample.computer/migrate/cloudfront-distribution/cache-policy-by-content","markdown":"https://ample.computer/migrate/cloudfront-distribution/cache-policy-by-content.md","json":"https://api.ample.computer/v1/catalog/recipes/page%3Amigrate%3Acloudfront-distribution%3Acache-policy-by-content"},"nextActions":[{"actionId":"browse-catalog","label":"Browse the catalog index","operationId":"catalog_index","method":"GET","relativePath":"/v1/catalog","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"search-recipes","label":"Search published recipes by intent, stack and constraints","operationId":"search_recipes","method":"POST","relativePath":"/v1/catalog/search","origin":"api","parameters":{"body":{"limit":5,"query":"Migrate CloudFront distribution: Cache policy by content"}},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"plan:page:migrate:cloudfront-distribution:cache-policy-by-content","label":"Prepare a side-effect-free deployment plan for an authorized project","operationId":"plan_deployment","method":"POST","relativePath":"/v1/catalog/plan","origin":"api","parameters":{"body":{"inputs":{},"projectId":"<workspace or server id you own>","recipeId":"page:migrate:cloudfront-distribution:cache-policy-by-content","recipeRevision":"r1"}},"requiresAuthentication":true,"requiresApproval":false},{"actionId":"auth-setup","label":"Read the existing agent authentication setup","operationId":"existing_auth_setup","method":"GET","relativePath":"/mcp/setup","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:migration:cloudfront-distribution","label":"Browse CloudFront distribution","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/migration%3Acloudfront-distribution","origin":"api","parameters":{"nodeId":"migration:cloudfront-distribution"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:pattern:cache-policy-by-content","label":"Browse Cache policy by content","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/pattern%3Acache-policy-by-content","origin":"api","parameters":{"nodeId":"pattern:cache-policy-by-content"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:intent:migrate-cdn","label":"Browse Migrate CDN","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/intent%3Amigrate-cdn","origin":"api","parameters":{"nodeId":"intent:migrate-cdn"},"requiresAuthentication":false,"requiresApproval":false}]}