This patch fixes two bugs in Zookeeper backends:
* backend was determining if the node is a leaf or not basing on the number
of the childer given node has. This is incorrect if you consider the fact
that deleteing nested node can leave empty prefixes/dirs behind which have
neither children nor data inside. The fix changes this situation by testing
if the node has any data set - if not then it is not a leaf.
* zookeeper does not delete nodes that do not have childern just like consul
does and this leads to leaving empty nodes behind. In order to fix it, we
scan the logical path of a secret being deleted for empty dirs/prefixes and
remove them up until first non-empty one.
Current tests were not checking if backends are properly removing
nested secrets. We follow here the behaviour of Consul backend, where
empty "directories/prefixes" are automatically removed by Consul itself.
The rolename is now saved to the secret internal data for fetching
later during the user revocation process. No longer deriving the role
name from request path
Added support for default revoke SQL statements that will provide the
same functionality as before. If not revoke SQL statements are provided
the default statements are used.
Cleaned up personal ignores from the .gitignore file
Adds HUP support for audit log files to close and reopen. This makes it
much easier to deal with normal log rotation methods.
As part of testing this I noticed that HUP and other items that come out
of command/server.go are going to stderr, which is where our normal log
lines go. This isn't so much problematic with our normal output but as
we officially move to supporting other formats this can cause
interleaving issues, so I moved those to stdout instead.
