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Add state diagram for compute

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Models a compute's lifetime.
This commit is contained in:
Tristan Partin
2024-03-18 15:34:16 -05:00
committed by Tristan Partin
parent 55c4ef408b
commit 041b653a1a
1 changed files with 23 additions and 0 deletions
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compute_tools/README.md
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@@ -32,6 +32,29 @@ compute_ctl -D /var/db/postgres/compute \
-b /usr/local/bin/postgres
```
## State Diagram
Computes can be in various states. Below is a diagram that details how a
compute moves between states.
```mermaid
%% https://mermaid.js.org/syntax/stateDiagram.html
stateDiagram-v2
[*] --> Empty : Compute spawned
Empty --> ConfigurationPending : Waiting for compute spec
ConfigurationPending --> Configuration : Received compute spec
Configuration --> Failed : Failed to configure the compute
Configuration --> Running : Compute has been configured
Empty --> Init : Compute spec is immediately available
Empty --> TerminationPending : Requested termination
Init --> Failed : Failed to start Postgres
Init --> Running : Started Postgres
Running --> TerminationPending : Requested termination
TerminationPending --> Terminated : Terminated compute
Failed --> [*] : Compute exited
Terminated --> [*] : Compute exited
```
## Tests
Cargo formatter: