mirror of
https://github.com/eosswedenorg/antelope-api-healthcheck
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59 lines
2.6 KiB
Markdown
59 lines
2.6 KiB
Markdown
# EOSIO API Healthcheck for HAProxy
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This program implements EOSIO healthcheck for HAProxy over TCP.
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## Compiling
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You will need go-lang version `1.16` or later to compile the source.
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compile with `compile.sh` script
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```sh
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$ ./compile.sh
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```
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Execute `./compile.sh --help` to see all available flags to crosscompile for different systems/architectures.
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### Package
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run `./package.sh` to generate package. Debian (.deb) and FreeBSD are supported.
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## TCP Protocol
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The protocol is simple and has 4 rules.
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1. Data is transmitted in `packets` encoded in ascii and ends with newline `\n`.
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2. There are two types of packages: `Request` and `Response`. Each `Request` has exactly one `Response`.
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3. Each parameter inside a `Request` is separated by `|`
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4. Each response contains exactly one `status code` (see below)
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### Request
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The following parameters are supported in a request and are ordered from
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first to last below:
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| # | Name | Required | Description |
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| - | ---------- | ----------------------- | ----------------------------------------------------------------------------------------------- |
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| 1 | api | Yes | Type of API to check against, `v1` = standard, `v2` = Hyperion, `contract` = eosio-contract-api |
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| 2 | url | Yes (port default `80`) | http url to the api. `http(s)://<ip-or-domain>(:<port>)` |
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| 3 | num_blocks | No (default `10`) | Number of blocks the api can drift before reported `down` |
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| 4 | host | No (default from `url`) | Value to send in the `HTTP Host Header` to the API |
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### Response
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The api can respond with exactly one `status code`.
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See [HAproxy documentation](https://cbonte.github.io/haproxy-dconv/1.7/configuration.html#5.2-agent-check) for more information
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| code | Description |
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| --------- | ---------------------------------------------------------- |
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| `up` | Api is healthy |
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| `down` | Api is not healthy |
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| `fail` | The program failed to read the status from the api. |
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| `maint` | Api is set in maintenance mode (not used) |
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| `ready` | Api is ready again after being in `maint` state (not used) |
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| `stopped` | Api has been stopped manually (not used) |
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## Author
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Henrik Hautakoski - [henrik@eossweden.org](mailto:henrik@eossweden.org)
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