chore: remove legacy AgentIP address (#14640)

Removes the support for the Agent's "legacy IP" which was a hardcoded IP address all agents used to use, before we introduced "single tailnet". Single tailnet went GA in 2.7.0.

agent/agent.go

@@ -1119,9 +1119,6 @@ func (a *agent) wireguardAddresses(agentID uuid.UUID) []netip.Prefix {
 		return []netip.Prefix{
 			// This is the IP that should be used primarily.
 			netip.PrefixFrom(tailnet.IPFromUUID(agentID), 128),
-			// We also listen on the legacy codersdk.WorkspaceAgentIP. This
-			// allows for a transition away from wsconncache.
-			netip.PrefixFrom(workspacesdk.AgentIP, 128),
 		}
 	}
 

codersdk/workspacesdk/workspacesdk.go

@@ -25,15 +25,6 @@ import (
 	"github.com/coder/quartz"
 )
 
-// AgentIP is a static IPv6 address with the Tailscale prefix that is used to route
-// connections from clients to this node. A dynamic address is not required because a Tailnet
-// client only dials a single agent at a time.
-//
-// Deprecated: use tailnet.IP() instead. This is kept for backwards
-// compatibility with outdated CLI clients and Workspace Proxies that dial it.
-// See: https://github.com/coder/coder/issues/11819
-var AgentIP = netip.MustParseAddr("fd7a:115c:a1e0:49d6:b259:b7ac:b1b2:48f4")
-
 var ErrSkipClose = xerrors.New("skip tailnet close")
 
 const (

enterprise/tailnet/pgcoord_test.go

@@ -25,7 +25,6 @@ import (
 	"github.com/coder/coder/v2/coderd/database/dbmock"
 	"github.com/coder/coder/v2/coderd/database/dbtestutil"
 	"github.com/coder/coder/v2/coderd/database/pubsub"
-	"github.com/coder/coder/v2/codersdk/workspacesdk"
 	"github.com/coder/coder/v2/enterprise/tailnet"
 	agpl "github.com/coder/coder/v2/tailnet"
 	"github.com/coder/coder/v2/tailnet/proto"
@@ -210,48 +209,6 @@ func TestPGCoordinatorSingle_AgentValidIP(t *testing.T) {
 	assertEventuallyLost(ctx, t, store, agent.id)
 }
 
-func TestPGCoordinatorSingle_AgentValidIPLegacy(t *testing.T) {
-	t.Parallel()
-	if !dbtestutil.WillUsePostgres() {
-		t.Skip("test only with postgres")
-	}
-	store, ps := dbtestutil.NewDB(t)
-	ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitSuperLong)
-	defer cancel()
-	logger := slogtest.Make(t, nil).Leveled(slog.LevelDebug)
-	coordinator, err := tailnet.NewPGCoord(ctx, logger, ps, store)
-	require.NoError(t, err)
-	defer coordinator.Close()
-
-	agent := newTestAgent(t, coordinator, "agent")
-	defer agent.close()
-	agent.sendNode(&agpl.Node{
-		Addresses: []netip.Prefix{
-			netip.PrefixFrom(workspacesdk.AgentIP, 128),
-		},
-		PreferredDERP: 10,
-	})
-	require.Eventually(t, func() bool {
-		agents, err := store.GetTailnetPeers(ctx, agent.id)
-		if err != nil && !xerrors.Is(err, sql.ErrNoRows) {
-			t.Fatalf("database error: %v", err)
-		}
-		if len(agents) == 0 {
-			return false
-		}
-		node := new(proto.Node)
-		err = gProto.Unmarshal(agents[0].Node, node)
-		assert.NoError(t, err)
-		assert.EqualValues(t, 10, node.PreferredDerp)
-		return true
-	}, testutil.WaitShort, testutil.IntervalFast)
-	err = agent.close()
-	require.NoError(t, err)
-	<-agent.errChan
-	<-agent.closeChan
-	assertEventuallyLost(ctx, t, store, agent.id)
-}
-
 func TestPGCoordinatorSingle_AgentWithClient(t *testing.T) {
 	t.Parallel()
 	if !dbtestutil.WillUsePostgres() {

site/e2e/tests/outdatedCLI.spec.ts

@@ -11,8 +11,7 @@ import {
 } from "../helpers";
 import { beforeCoderTest } from "../hooks";
 
-// we no longer support versions prior to single tailnet: https://github.com/coder/coder/commit/d7cbdbd9c64ad26821e6b35834c59ecf85dcd9d4
-const clientVersion = "v0.27.0";
+const clientVersion = "v2.8.0";
 
 test.beforeEach(({ page }) => beforeCoderTest(page));
 

tailnet/coordinator_test.go

@@ -22,7 +22,6 @@ import (
 
 	"cdr.dev/slog"
 	"cdr.dev/slog/sloggers/slogtest"
-	"github.com/coder/coder/v2/codersdk/workspacesdk"
 	"github.com/coder/coder/v2/tailnet"
 	"github.com/coder/coder/v2/tailnet/proto"
 	"github.com/coder/coder/v2/tailnet/tailnettest"
@@ -133,41 +132,6 @@ func TestCoordinator(t *testing.T) {
 		_ = testutil.RequireRecvCtx(ctx, t, closeChan)
 	})
 
-	t.Run("AgentWithoutClients_ValidIPLegacy", func(t *testing.T) {
-		t.Parallel()
-		logger := slogtest.Make(t, nil).Leveled(slog.LevelDebug)
-		ctx := testutil.Context(t, testutil.WaitMedium)
-		coordinator := tailnet.NewCoordinator(logger)
-		defer func() {
-			err := coordinator.Close()
-			require.NoError(t, err)
-		}()
-		client, server := net.Pipe()
-		sendNode, errChan := tailnet.ServeCoordinator(client, func(node []*tailnet.Node) error {
-			return nil
-		})
-		id := uuid.New()
-		closeChan := make(chan struct{})
-		go func() {
-			err := coordinator.ServeAgent(server, id, "")
-			assert.NoError(t, err)
-			close(closeChan)
-		}()
-		sendNode(&tailnet.Node{
-			Addresses: []netip.Prefix{
-				netip.PrefixFrom(workspacesdk.AgentIP, 128),
-			},
-			PreferredDERP: 10,
-		})
-		require.Eventually(t, func() bool {
-			return coordinator.Node(id) != nil
-		}, testutil.WaitShort, testutil.IntervalFast)
-		err := client.Close()
-		require.NoError(t, err)
-		_ = testutil.RequireRecvCtx(ctx, t, errChan)
-		_ = testutil.RequireRecvCtx(ctx, t, closeChan)
-	})
-
 	t.Run("AgentWithoutClients_InvalidIP", func(t *testing.T) {
 		t.Parallel()
 		logger := slogtest.Make(t, &slogtest.Options{IgnoreErrors: true}).Leveled(slog.LevelDebug)