Inconsistent behaviour of `Desc.AddIngester`

[codesome]

Before the introduction of normalized tokens, Desc.AddIngester used to append tokens to the existing ones. But currently, it works as append when it's not normalized tokens and replace when it's normalized tokens.

cortex/pkg/ring/model.go

Lines 38 to 63 in 08ddf88

	// AddIngester adds the given ingester to the ring.
	func (d *Desc) AddIngester(id, addr string, tokens []uint32, state IngesterState, normaliseTokens bool) {
	if d.Ingesters == nil {
	d.Ingesters = map[string]IngesterDesc{}
	}
	ingester := IngesterDesc{
	Addr: addr,
	Timestamp: time.Now().Unix(),
	State: state,
	}
	if normaliseTokens {
	ingester.Tokens = tokens
	} else {
	for _, token := range tokens {
	d.Tokens = append(d.Tokens, TokenDesc{
	Token: token,
	Ingester: id,
	})
	}
	sort.Sort(ByToken(d.Tokens))
	}
	d.Ingesters[id] = ingester
	}

Looking at places where Desc.AddIngester is used, append seems to be the desired behaviour. Discovered in #1750 and @pstibrany plans to fix it in #1809

[pstibrany]

Looking at places where Desc.AddIngester is used, append seems to be the desired behaviour.

append was desired behaviour only when not doing normalization. Since we're removing that option, AddIngester will now always replace the tokens. That requires small change in autoJoin method, but all other places are unaffected. This is how I implemented it in #1809

[codesome]

Oh okay. Yes, autoJoin was the only place it could cause a problem. Didn't notice that change in the PR (I didn't have a look tbh :) )