{"record":{"id":"340a47e599aeffae","repo":"hashicorp/packer","slug":"error-retrieving-iteration-from-hcp-packer-registr","errorCode":null,"errorMessage":"error retrieving iteration from HCP Packer registry: %s","messagePattern":"error retrieving iteration from HCP Packer registry: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"datasource/hcp-packer-iteration/data.go","lineNumber":117,"sourceCode":"\treturn (&DatasourceOutput{}).FlatMapstructure().HCL2Spec()\n}\n\nfunc (d *Datasource) Execute() (cty.Value, error) {\n\tlog.Printf(\"[WARN] Deprecation: `hcp-packer-iteration` datasource has been deprecated. \" +\n\t\t\"Please use `hcp-packer-version` datasource instead.\")\n\tctx := context.TODO()\n\n\tcli, err := hcpapi.NewDeprecatedClient()\n\tif err != nil {\n\t\treturn cty.NullVal(cty.EmptyObject), err\n\t}\n\t// Load channel.\n\tlog.Printf(\"[INFO] Reading iteration info from HCP Packer registry (%s) [project_id=%s, organization_id=%s, channel=%s]\",\n\t\td.config.Bucket, cli.ProjectID, cli.OrganizationID, d.config.Channel)\n\n\tchannel, err := cli.GetChannel(ctx, d.config.Bucket, d.config.Channel)\n\tif err != nil {\n\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"error retrieving \"+\n\t\t\t\"iteration from HCP Packer registry: %s\", err.Error())\n\t}\n\tif channel.Iteration == nil {\n\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"there is no iteration associated with the channel %s\",\n\t\t\td.config.Channel)\n\t}\n\n\titeration := channel.Iteration\n\n\trevokeAt := time.Time(iteration.RevokeAt)\n\tif !revokeAt.IsZero() && revokeAt.Before(time.Now().UTC()) {\n\t\t// If RevokeAt is not a zero date and is before NOW, it means this iteration is revoked and should not be used\n\t\t// to build new images.\n\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"the iteration associated with the channel %s is revoked and can not be used on Packer builds\",\n\t\t\td.config.Channel)\n\t}\n\n\toutput := DatasourceOutput{","sourceCodeStart":99,"sourceCodeEnd":135,"githubUrl":"https://github.com/hashicorp/packer/blob/eb36e3c3e48a036f3e8cc94087636ee72e1303c9/datasource/hcp-packer-iteration/data.go#L99-L135","documentation":"The hcp-packer-iteration datasource called cli.GetChannel to resolve the configured channel, and the HCP Packer API call failed (network error, auth failure, or not-found). The underlying error text is interpolated into this message. It is a transport/API-level failure, distinct from the nil-iteration case handled next.","triggerScenarios":"Execute -> cli.GetChannel(ctx, d.config.Bucket, d.config.Channel) returns a non-nil error; e.g. 404 for a nonexistent bucket/channel, 401/403 from invalid HCP_CLIENT_ID/HCP_CLIENT_SECRET or wrong project/organization, 5xx, DNS or proxy failure.","commonSituations":"Expired or missing HCP credentials in the environment; typo in bucket_name or channel; service principal lacking access to the project; corporate proxy or offline CI runner; HCP Packer registry outage.","solutions":["Read the wrapped '%s' text in the error to identify the root cause (404 vs 401 vs network).","Verify HCP_CLIENT_ID, HCP_CLIENT_SECRET, and project/organization IDs are set and valid.","Confirm bucket_name and channel names exist in the registry via the HCP UI or `hcp packer` CLI.","Check network/proxy connectivity from the machine running packer build.","Retry if the wrapped error indicates a transient 429/5xx."],"exampleFix":"// before (shell, missing creds)\npacker build template.pkr.hcl\n// after\nexport HCP_CLIENT_ID=\"<service-principal-client-id>\"\nexport HCP_CLIENT_SECRET=\"<service-principal-secret>\"\npacker build template.pkr.hcl","handlingStrategy":"retry","validationCode":"# Verify credentials and reachability before building:\ncurl -sS -o /dev/null -w '%{http_code}' https://api.cloud.hashicorp.com || echo 'network unreachable'\n[ -n \"$HCP_CLIENT_ID\" ] && [ -n \"$HCP_CLIENT_SECRET\" ] || { echo 'HCP credentials missing'; exit 1; }","typeGuard":null,"tryCatchPattern":"// Retry transient failures, surface permanent ones:\nfor i in 1 2 3; do\n  packer build template.pkr.hcl && break\n  err=$(packer build template.pkr.hcl 2>&1) || true\n  echo \"$err\" | grep -qE '429|50[03]|timeout|connection' || { echo \"$err\"; exit 1; }\n  sleep $((i*10))\ndone","preventionTips":["Set HCP_CLIENT_ID/HCP_CLIENT_SECRET in CI secrets, not inline.","Verify service principal has access to the exact project_id/organization_id.","Test channel/bucket existence with `hcp packer` CLI before builds.","Add retry with backoff for 429/5xx; fail fast on 401/403/404."],"tags":["hcp-packer","api","network","authentication"],"backgroundTag":"api-request-failed","analyzedSha":"eb36e3c3e48a036f3e8cc94087636ee72e1303c9","analyzedAt":"2026-09-05T13:20:43.127Z","contentChangedAt":"2026-09-05T13:20:43.127Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}