Commit Graph

2 Commits (main)

Author SHA1 Message Date
Nick Khyl 2336c340c4 util/syspolicy: implement a syspolicy store that reads settings from environment variables
In this PR, we implement (but do not use yet, pending #13727 review) a syspolicy/source.Store
that reads policy settings from environment variables. It converts a CamelCase setting.Key,
such as AuthKey or ExitNodeID, to a SCREAMING_SNAKE_CASE, TS_-prefixed environment
variable name, such as TS_AUTH_KEY and TS_EXIT_NODE_ID. It then looks up the variable
and attempts to parse it according to the expected value type. If the environment variable
is not set, the policy setting is considered not configured in this store (the syspolicy package
will still read it from other sources). Similarly, if the environment variable has an invalid value
for the setting type, it won't be used (though the reported/logged error will differ).

Updates #13193
Updates #12687

Signed-off-by: Nick Khyl <nickk@tailscale.com>
4 weeks ago
Nick Khyl aeb15dea30 util/syspolicy/source: add package for reading policy settings from external stores
We add package defining interfaces for policy stores, enabling creation of policy sources
and reading settings from them. It includes a Windows-specific PlatformPolicyStore for GP and MDM
policies stored in the Registry, and an in-memory TestStore for testing purposes.

We also include an internal package that tracks and reports policy usage metrics when a policy setting
is read from a store. Initially, it will be used only on Windows and Android, as macOS, iOS, and tvOS
report their own metrics. However, we plan to use it across all platforms eventually.

Updates #12687

Signed-off-by: Nick Khyl <nickk@tailscale.com>
3 months ago