New resource naming conventions:
- Do not repeat the Kind in the name,
e.g. do not call it foo-cluster-role-binding, just call it foo
- Names will generally start with a prefix to identify our component,
so when a user lists all objects of that kind, they can tell to which
component it is related,
e.g. `kubectl get configmaps` would list one named "pinniped-config"
- It should be possible for an operator to make the word "pinniped"
mostly disappear if they choose, by specifying the app_name in
values.yaml, to the extent that is practical (but not from APIService
names because those are hardcoded in golang)
- Each role/clusterrole and its corresponding binding have the same name
- Pinniped resource names that must be known by the server golang code
are passed to the code at run time via ConfigMap, rather than
hardcoded in the golang code. This also allows them to be prepended
with the app_name from values.yaml while creating the ConfigMap.
- Since the CLI `get-kubeconfig` command cannot guess the name of the
CredentialIssuerConfig resource in advance anymore, it lists all
CredentialIssuerConfig in the app's namespace and returns an error
if there is not exactly one found, and then uses that one regardless
of its name
These configuration knobs are much more human-understandable than the
previous percentage-based threshold flag.
We now allow users to set the lifetime of the serving cert via a ConfigMap.
Previously this was hardcoded to 1 year.
Signed-off-by: Andrew Keesler <akeesler@vmware.com>
- Users may want to consume pkg/config to generate configuration files.
- This also involved putting config-related utilities in the config
package for ease of consumption.
- We did not add in versioning into the Config type for now...this is
something we will likely do in the future, but it is not deemed
necessary this early in the project.
- The config file format tries to follow the patterns of Kube. One such
example of this is requiring the use of base64-encoded CA bundle PEM
bytes instead of a file path. This also slightly simplifies the config
file handling because we don't have to 1) read in a file or 2) deal
with the error case of the file not being there.
- The webhook code from k8s.io/apiserver is really exactly what we want
here. If this dependency gets too burdensome, we can always drop it,
but the pros outweigh the cons at the moment.
- Writing out a kubeconfig to disk to configure the webhook is a little
janky, but hopefully this won't hurt performance too much in the year
2020.
- Also bonus: call the right *Serve*() function when starting our
servers.
Signed-off-by: Andrew Keesler <akeesler@vmware.com>
