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trivy/docs/vulnerability/examples/cache.md
2022-01-18 15:16:00 +02:00

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# Cache
## Clear Caches
The `--clear-cache` option removes caches.
**The scan is not performed.**
```
$ trivy image --clear-cache
```
<details>
<summary>Result</summary>
```
2019-11-15T15:13:26.209+0200 INFO Reopening vulnerability DB
2019-11-15T15:13:26.209+0200 INFO Removing image caches...
```
</details>
## Cache Directory
Specify where the cache is stored with `--cache-dir`.
```
$ trivy --cache-dir /tmp/trivy/ image python:3.4-alpine3.9
```
## Cache Backend
!!! warning "EXPERIMENTAL"
This feature might change without preserving backwards compatibility.
Trivy supports local filesystem and Redis as the cache backend. This option is useful especially for client/server mode.
Two options:
- `fs`
- the cache path can be specified by `--cache-dir`
- `redis://`
- `redis://[HOST]:[PORT]`
```
$ trivy server --cache-backend redis://localhost:6379
```
Trivy also support for connecting to Redis using TLS, you only need to specify `--redis-ca` , `--redis-cert` , and `--redis-key` option.
```
$ trivy server --cache-backend redis://localhost:6379 \
--redis-ca /path/to/ca-cert.pem \
--redis-cert /path/to/cert.pem \
--redis-key /path/to/key.pem
```
TLS option for redis is hidden from Trivy command-line flag, but you still can use it.