add a way to configure the `proxy_cache_*` [1] directive for external-auth.
The user-defined cache_key may contain sensitive information
(e.g. Authorization header).
We want to store *only* a hash of that key, not the key itself on disk.
[1] http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_key
Signed-off-by: Moritz Johner <beller.moritz@googlemail.com>
add test for new auth-snippet annotation
document auth-snippet annotation
add e2e test for auth-snippet annotation
add log warning and update documentation
Each e2e test is creating the same(or similar) Ingress Resource in
different ways. This makes common ingress resource creation be
performed by a framework method, reducing code duplication
Resolves an issue where the proxy-redirect annotations were not generating the
correct configuration possibly because of user error. This is done by only
setting the proxy_redirect if both proxy-redirect-from and proxy-redirect-to
have valid values. Also adds the e2e tests.
Fixes#2074
