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Add distibuted cache with Redis

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Lukasz Raczylo
2024-06-11 09:46:38 +01:00
parent a01a4da9b5
commit 12e0294945
15 changed files with 407 additions and 89 deletions
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README.md
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@@ -122,6 +122,10 @@ You can still use the non-prefixed environment variables in the spirit of the ba
| `ROLE_RATE_LIMIT` | Enable request rate limiting based on role| `false` |
| `ENABLE_GLOBAL_CACHE` | Enable the cache | `false` |
| `CACHE_TTL` | The cache TTL | `60` |
| `ENABLE_REDIS_CACHE` | Enable distributed Redis cache | `false` |
| `CACHE_REDIS_URL` | URL to redis server / cluster endpoint | `localhost:6379` |
| `CACHE_REDIS_PASSWORD` | Redis connection password | `` |
| `CACHE_REDIS_DB` | Redis DB id | `0` |
| `LOG_LEVEL` | The log level | `info` |
| `BLOCK_SCHEMA_INTROSPECTION`| Blocks the schema introspection | `false` |
| `ALLOWED_INTROSPECTION` | Allow only certain queries in introspection | `` |
@@ -140,7 +144,7 @@ You can still use the non-prefixed environment variables in the spirit of the ba
#### Caching
The cache engine is enabled in the background by default, using no additional resources.
You can then start using the cache by setting the `ENABLE_GLOBAL_CACHE` environment variable to `true` - which will enable the cache for all queries without introspection. You can leave the global cache disabled and enable the cache for specific queries by adding the `@cached` directive to the query.
You can then start using the cache by setting the `ENABLE_GLOBAL_CACHE` or `ENABLE_REDIS_CACHE` environment variable to `true` - which will enable the cache for all queries without introspection. You can leave the global cache disabled and enable the cache for specific queries by adding the `@cached` directive to the query.
In the case of the `@cached` you can add additional parameters to the directive which will set the cache for specific queries to the provided time.
For example, `query MyCachedQuery @cached(ttl: 90) ....` will set the cache for the query to 90 seconds.
@@ -159,6 +163,7 @@ query MyProducts @cached(refresh: true) {
```
Since version `0.5.30` the cache is gzipped in the memory, which should optimise the memory usage quite significantly.
Since version `0.15.48` the you can also use the distributed Redis cache.
#### Read-only endpoint
@@ -289,4 +294,7 @@ graphql_proxy_executed_query{user_id="-",op_type="query",op_name="checkIfSpamAIR
graphql_proxy_requests_failed 324
graphql_proxy_requests_skipped 0
graphql_proxy_requests_succesful 454823
graphql_proxy_cache_hit{microservice="graphql_proxy",pod="hasura-w-proxy-internal-6b5f4b4bbb-9xwfc"} 7
graphql_proxy_cache_hit{pod="hasura-w-proxy-internal-6b5f4b4bbb-9xwfc",microservice="graphql_proxy"} 1
graphql_proxy_cache_miss{microservice="graphql_proxy",pod="hasura-w-proxy-internal-6b5f4b4bbb-9xwfc"} 23
```