38 lines
3.2 KiB
Markdown
38 lines
3.2 KiB
Markdown
# 发布前结构核验
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`orbit-admin verify` 是只读的发布、迁移和恢复前置检查。它不会执行迁移、修复脏账本、删除数据或修改权限；数据库账户通过 `ORBIT_MYSQL_DSN` 注入，建议使用受限只读账户。
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```sh
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ORBIT_MYSQL_DSN='user:password@tcp(127.0.0.1:3306)/orbit' \
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go run ./cmd/orbit-admin verify
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```
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成功时输出类似：
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```json
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{"schema_version":28,"migration_count":28,"foreign_key_count":0,"required_index_count":6,"complete":true}
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```
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`complete=true` 表示当前二进制的迁移账本、Orbit 表零外键，以及 000026–000028 的六个有界观测索引均满足要求。命令不会证明备份可恢复、复制已确认、业务副作用已核对或生产 RPO/RTO 达标；这些仍需隔离环境恢复演练和真实拓扑验收。失败时会先输出不含 DSN/密钥的检查结果，再以非零状态退出。
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发布流程应先停止不兼容的旧写入节点，在隔离环境和目标维护窗口应用 `orbit-migrate up`，随后执行 `orbit-admin verify`；只有输出完整且人工核对备份、权限、连接路由后才启动新版本。verify 不是运行时协调器，多个节点可并发读取，但不能替代一次性迁移锁。
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## 2. 只读运行快照
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需要在没有开启指标监听时查看平台积压趋势，可执行：
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```sh
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ORBIT_MYSQL_DSN='user:password@tcp(127.0.0.1:3306)/orbit' \
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go run ./cmd/orbit-admin observe snapshot
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```
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命令只执行固定索引上的只读查询，输出 `snapshot`、`sample_limit`、`event_window_seconds` 和 `scope`。任务、交付、流程、Inbox按固定状态分别采样，每个状态最多10000条；事件和阶段耗时只看最近5分钟。达到上限时 `snapshot.truncated=true`，计数只能解释为本节点有界样本，不能作为全局精确数量。命令不接受租户、状态或表名参数，也不执行修复、归档、删除和权限变更。
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示例：
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```json
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{"snapshot":{"task_states":{"WAITING":0,"LEASED":0,"RUNNING":0,"NEEDS_REVIEW":0,"SUCCEEDED":0,"FAILED":0,"CANCELLED":0},"task_oldest_age_seconds":0,"delivery_states":{"PENDING":0,"LEASED":0,"ACKED":0,"EXPIRED":0},"delivery_oldest_age_seconds":0,"workflow_states":{"RUNNING":0,"WAITING":0,"CANCELLING":0,"NEEDS_REVIEW":0,"SUCCEEDED":0,"FAILED":0,"CANCELLED":0},"workflow_oldest_age_seconds":0,"inbox_states":{"PENDING":0,"LEASED":0,"PROCESSED":0,"QUARANTINED":0},"inbox_oldest_age_seconds":0,"truncated":false,"recent_events":{},"task_terminal_latency_seconds":0,"task_terminal_latency_max_seconds":0,"workflow_terminal_latency_seconds":0,"workflow_terminal_latency_max_seconds":0,"task_accept_to_start_latency_seconds":0,"task_accept_to_start_latency_max_seconds":0,"task_accept_to_terminal_latency_seconds":0,"task_accept_to_terminal_latency_max_seconds":0,"workflow_start_to_terminal_latency_seconds":0,"workflow_start_to_terminal_latency_max_seconds":0},"sample_limit":10000,"event_window_seconds":300,"scope":"single database node; bounded sample, not a global exact count"}
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```
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它与 `/metrics` 共享同一有界读取实现，但不会改变指标注册器或业务状态；遇到数据库超时会返回非零状态，调用方应保留上一次成功快照并排查数据库。
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