Since `connectionStringFile` reads the file and puts it into the
invocation of the exporter, it's part of the cmdline and thus
effectively world-readable.
Added a new `connectionEnvFile` which is supposed to be an environment
file of the form
PGBOUNCER_EXPORTER_CONNECTION_STRING=...
that will be added to the systemd service. The exporter will read the
connection string from that value.
PgBouncer instance running on localhost may not be the on being
monitored in connectionString. Remove checks that forbid valid
configuration from being used and instead document requirements for
PgBouncer configuration when used with the exporter.
Fixes issues described in #208242 for this part of the nixpkgs tree.
There are no behavioral changes in this, it only adjusts the code so
that it is easier to understand.
these changes were generated with nixq 0.0.2, by running
nixq ">> lib.mdDoc[remove] Argument[keep]" --batchmode nixos/**.nix
nixq ">> mdDoc[remove] Argument[keep]" --batchmode nixos/**.nix
nixq ">> Inherit >> mdDoc[remove]" --batchmode nixos/**.nix
two mentions of the mdDoc function remain in nixos/, both of which
are inside of comments.
Since lib.mdDoc is already defined as just id, this commit is a no-op as
far as Nix (and the built manual) is concerned.
