// balance ensures that stale clients and other resources will be closed and
// removed.
func (g *Group) balance(ids machine.IDSlice) {
var (
regAlias = g.alias.Registered()
regAddress = g.address.Registered()
regClient = g.client.Registered()
)
union := idset.Union(idset.Union(regAlias, regAddress), regClient)
for _, id := range idset.Diff(union, ids) {
var errored = false
// Drop machine alias.
if err := g.alias.Drop(id); err != nil {
errored = true
g.log.Warning("Alias of machine %s cannot be removed: %v", id, err)
}
// Drop machine client.
if err := g.client.Drop(id); err != nil {
errored = true
g.log.Warning("Client for machine %s cannot be deleted: %v", id, err)
}
// Drop all machine addresses.
if err := g.address.Drop(id); err != nil {
errored = true
g.log.Warning("Addresses of %s machine cannot be removed: %v", id, err)
}
if !errored {
g.log.Info("Machine with ID: %s was removed.", id)
}
}
}
// bootstrap initializes machine group workers and checks loaded data for
// consistency.
func (g *Group) bootstrap() {
var (
aliasIDs = g.alias.Registered()
addressIDs = g.address.Registered()
)
// Report and generate missing aliases.
if noAliases := idset.Diff(addressIDs, aliasIDs); len(noAliases) != 0 {
g.log.Warning("Missing aliases for %v, regenerating...", noAliases)
for _, id := range noAliases {
alias, err := g.alias.Create(id)
if err != nil {
g.log.Error("Cannot create alias for %s: %s", id, err)
}
g.log.Info("Created alias for %s, %s", id, alias)
}
}
// Start clients for stored IDs.
for _, id := range addressIDs {
if err := g.client.Create(id, g.dynamicAddr(id)); err != nil {
g.log.Error("Cannot create client for %s: %s", id, err)
}
}
n := len(idset.Union(aliasIDs, addressIDs))
g.log.Info("Detected %d machines, started %d clients.", n, len(g.client.Registered()))
}