config

type Config struct {
	// We do not combine the state directory and backup directory for
	// several reasons:
	// - The backup directory needs to be configurable since there
	// may not be enough space in the default location. If the state and
	// backup directories are combined and the backup directory needs to be
	// changed, then we have to preserve gpupgrade state by copying
	// substeps.json and config.json to the new location. This is awkward,
	// hard to manage, and error prone.
	// - The default state directory $HOME/.gpupgrade is known upfront with
	// no dependencies. Whereas the default backup directory is based on the
	// data directories. Having a state directory with no dependencies is
	// much easier to create and remove during the gpupgrade lifecycle.
	BackupDirs backupdir.BackupDirs

	// Source is the GPDB cluster that is being upgraded. It is populated during
	// the generation of the cluster config in the initialize step; before that,
	// it is nil.
	Source *greenplum.Cluster

	// Intermediate represents the initialized target cluster that is upgraded
	// based on the source.
	Intermediate *greenplum.Cluster

	// Target is the upgraded GPDB cluster. It is populated during the target
	// gpinitsystem execution in the initialize step; before that, it is nil.
	Target *greenplum.Cluster

	HubPort         int
	AgentPort       int
	Mode            idl.Mode
	UseHbaHostnames bool
	UpgradeID       string
	PgUpgradeJobs   uint
}

type InvalidTempPortRangeError struct {
	ConflictingHost string
	ConflictingPort int
}