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chore: remove legacy wsconncache#11816

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Merged
spikecurtis merged 1 commit intomainfromspike/8218-remove-wsconncache
Jan 30, 2024
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1 change: 0 additions & 1 deletion.vscode/settings.json
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Original file line numberDiff line numberDiff line change
Expand Up@@ -170,7 +170,6 @@
"workspaceapps",
"workspacebuilds",
"workspacename",
"wsconncache",
"wsjson",
"xerrors",
"xlarge",
Expand Down
49 changes: 0 additions & 49 deletionscoderd/apidoc/docs.go
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45 changes: 0 additions & 45 deletionscoderd/apidoc/swagger.json
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2 changes: 0 additions & 2 deletionscoderd/coderd.go
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Original file line numberDiff line numberDiff line change
Expand Up@@ -65,7 +65,6 @@ import (
"github.com/coder/coder/v2/coderd/updatecheck"
"github.com/coder/coder/v2/coderd/util/slice"
"github.com/coder/coder/v2/coderd/workspaceapps"
"github.com/coder/coder/v2/coderd/wsconncache"
"github.com/coder/coder/v2/codersdk"
"github.com/coder/coder/v2/codersdk/drpc"
"github.com/coder/coder/v2/provisionerd/proto"
Expand DownExpand Up@@ -481,7 +480,6 @@ func New(options *Options) *API {
func(context.Context) (tailnet.MultiAgentConn, error) {
return (*api.TailnetCoordinator.Load()).ServeMultiAgent(uuid.New()), nil
},
wsconncache.New(api._dialWorkspaceAgentTailnet, 0),
api.TracerProvider,
)
if err != nil {
Expand Down
43 changes: 13 additions & 30 deletionscoderd/tailnet.go
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Original file line numberDiff line numberDiff line change
Expand Up@@ -22,7 +22,6 @@ import (
"cdr.dev/slog"
"github.com/coder/coder/v2/coderd/tracing"
"github.com/coder/coder/v2/coderd/workspaceapps"
"github.com/coder/coder/v2/coderd/wsconncache"
"github.com/coder/coder/v2/codersdk"
"github.com/coder/coder/v2/site"
"github.com/coder/coder/v2/tailnet"
Expand All@@ -41,16 +40,14 @@ func init() {

var _ workspaceapps.AgentProvider = (*ServerTailnet)(nil)

// NewServerTailnet creates a new tailnet intended for use by coderd. It
// automatically falls back to wsconncache if a legacy agent is encountered.
// NewServerTailnet creates a new tailnet intended for use by coderd.
func NewServerTailnet(
ctx context.Context,
logger slog.Logger,
derpServer *derp.Server,
derpMapFn func() *tailcfg.DERPMap,
derpForceWebSockets bool,
getMultiAgent func(context.Context) (tailnet.MultiAgentConn, error),
cache *wsconncache.Cache,
traceProvider trace.TracerProvider,
) (*ServerTailnet, error) {
logger = logger.Named("servertailnet")
Expand DownExpand Up@@ -97,7 +94,6 @@ func NewServerTailnet(
conn: conn,
coordinatee: conn,
getMultiAgent: getMultiAgent,
cache: cache,
agentConnectionTimes: map[uuid.UUID]time.Time{},
agentTickets: map[uuid.UUID]map[uuid.UUID]struct{}{},
transport: tailnetTransport.Clone(),
Expand DownExpand Up@@ -299,7 +295,6 @@ type ServerTailnet struct {

getMultiAgent func(context.Context) (tailnet.MultiAgentConn, error)
agentConn atomic.Pointer[tailnet.MultiAgentConn]
cache *wsconncache.Cache
nodesMu sync.Mutex
// agentConnectionTimes is a map of agent tailnetNodes the server wants to
// keep a connection to. It contains the last time the agent was connected
Expand All@@ -311,7 +306,7 @@ type ServerTailnet struct {
transport *http.Transport
}

func (s *ServerTailnet) ReverseProxy(targetURL, dashboardURL *url.URL, agentID uuid.UUID)(_*httputil.ReverseProxy, release func(), _ error) {
func (s *ServerTailnet) ReverseProxy(targetURL, dashboardURL *url.URL, agentID uuid.UUID) *httputil.ReverseProxy {
proxy := httputil.NewSingleHostReverseProxy(targetURL)
proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
site.RenderStaticErrorPage(w, r, site.ErrorPageData{
Expand All@@ -325,7 +320,7 @@ func (s *ServerTailnet) ReverseProxy(targetURL, dashboardURL *url.URL, agentID u
proxy.Director = s.director(agentID, proxy.Director)
proxy.Transport = s.transport

return proxy, func() {}, nil
return proxy
}

type agentIDKey struct{}
Expand DownExpand Up@@ -387,28 +382,17 @@ func (s *ServerTailnet) AgentConn(ctx context.Context, agentID uuid.UUID) (*code
ret func()
)

if s.getAgentConn().AgentIsLegacy(agentID) {
s.logger.Debug(s.ctx, "acquiring legacy agent", slog.F("agent_id", agentID))
cconn, release, err := s.cache.Acquire(agentID)
if err != nil {
return nil, nil, xerrors.Errorf("acquire legacy agent conn: %w", err)
}

conn = cconn.WorkspaceAgentConn
ret = release
} else {
s.logger.Debug(s.ctx, "acquiring agent", slog.F("agent_id", agentID))
err := s.ensureAgent(agentID)
if err != nil {
return nil, nil, xerrors.Errorf("ensure agent: %w", err)
}
ret = s.acquireTicket(agentID)

conn = codersdk.NewWorkspaceAgentConn(s.conn, codersdk.WorkspaceAgentConnOptions{
AgentID: agentID,
CloseFunc: func() error { return codersdk.ErrSkipClose },
})
s.logger.Debug(s.ctx, "acquiring agent", slog.F("agent_id", agentID))
err := s.ensureAgent(agentID)
if err != nil {
return nil, nil, xerrors.Errorf("ensure agent: %w", err)
}
ret = s.acquireTicket(agentID)

conn = codersdk.NewWorkspaceAgentConn(s.conn, codersdk.WorkspaceAgentConnOptions{
AgentID: agentID,
CloseFunc: func() error { return codersdk.ErrSkipClose },
})

// Since we now have an open conn, be careful to close it if we error
// without returning it to the user.
Expand DownExpand Up@@ -458,7 +442,6 @@ func (c *netConnCloser) Close() error {

func (s *ServerTailnet) Close() error {
s.cancel()
_ = s.cache.Close()
_ = s.conn.Close()
s.transport.CloseIdleConnections()
<-s.derpMapUpdaterClosed
Expand Down
88 changes: 2 additions & 86 deletionscoderd/tailnet_test.go
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Original file line numberDiff line numberDiff line change
Expand Up@@ -21,7 +21,6 @@ import (
"github.com/coder/coder/v2/agent"
"github.com/coder/coder/v2/agent/agenttest"
"github.com/coder/coder/v2/coderd"
"github.com/coder/coder/v2/coderd/wsconncache"
"github.com/coder/coder/v2/codersdk"
"github.com/coder/coder/v2/codersdk/agentsdk"
"github.com/coder/coder/v2/tailnet"
Expand All@@ -45,24 +44,6 @@ func TestServerTailnet_AgentConn_OK(t *testing.T) {
assert.True(t, conn.AwaitReachable(ctx))
}

func TestServerTailnet_AgentConn_Legacy(t *testing.T) {
t.Parallel()

ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitMedium)
defer cancel()

// Force a connection through wsconncache using the legacy hardcoded ip.
agentID, _, serverTailnet := setupAgent(t, []netip.Prefix{
netip.PrefixFrom(codersdk.WorkspaceAgentIP, 128),
})

conn, release, err := serverTailnet.AgentConn(ctx, agentID)
require.NoError(t, err)
defer release()

assert.True(t, conn.AwaitReachable(ctx))
}

func TestServerTailnet_ReverseProxy(t *testing.T) {
t.Parallel()

Expand All@@ -77,9 +58,7 @@ func TestServerTailnet_ReverseProxy(t *testing.T) {
u, err := url.Parse(fmt.Sprintf("http://127.0.0.1:%d", codersdk.WorkspaceAgentHTTPAPIServerPort))
require.NoError(t, err)

rp, release, err := serverTailnet.ReverseProxy(u, u, agentID)
require.NoError(t, err)
defer release()
rp := serverTailnet.ReverseProxy(u, u, agentID)

rw := httptest.NewRecorder()
req := httptest.NewRequest(
Expand DownExpand Up@@ -113,9 +92,7 @@ func TestServerTailnet_ReverseProxy(t *testing.T) {
uri, err := url.Parse(s.URL)
require.NoError(t, err)

rp, release, err := serverTailnet.ReverseProxy(uri, uri, agentID)
require.NoError(t, err)
defer release()
rp := serverTailnet.ReverseProxy(uri, uri, agentID)

rw := httptest.NewRecorder()
req := httptest.NewRequest(
Expand All@@ -130,38 +107,6 @@ func TestServerTailnet_ReverseProxy(t *testing.T) {

assert.Equal(t, expectedResponseCode, res.StatusCode)
})

t.Run("Legacy", func(t *testing.T) {
t.Parallel()

ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitLong)
defer cancel()

// Force a connection through wsconncache using the legacy hardcoded ip.
agentID, _, serverTailnet := setupAgent(t, []netip.Prefix{
netip.PrefixFrom(codersdk.WorkspaceAgentIP, 128),
})

u, err := url.Parse(fmt.Sprintf("http://127.0.0.1:%d", codersdk.WorkspaceAgentHTTPAPIServerPort))
require.NoError(t, err)

rp, release, err := serverTailnet.ReverseProxy(u, u, agentID)
require.NoError(t, err)
defer release()

rw := httptest.NewRecorder()
req := httptest.NewRequest(
http.MethodGet,
u.String(),
nil,
).WithContext(ctx)

rp.ServeHTTP(rw, req)
res := rw.Result()
defer res.Body.Close()

assert.Equal(t, http.StatusOK, res.StatusCode)
})
}

func setupAgent(t *testing.T, agentAddresses []netip.Prefix) (uuid.UUID, agent.Agent, *coderd.ServerTailnet) {
Expand DownExpand Up@@ -197,42 +142,13 @@ func setupAgent(t *testing.T, agentAddresses []netip.Prefix) (uuid.UUID, agent.A
return coord.Node(manifest.AgentID) != nil
}, testutil.WaitShort, testutil.IntervalFast)

cache := wsconncache.New(func(id uuid.UUID) (*codersdk.WorkspaceAgentConn, error) {
conn, err := tailnet.NewConn(&tailnet.Options{
Addresses: []netip.Prefix{netip.PrefixFrom(tailnet.IP(), 128)},
DERPMap: manifest.DERPMap,
Logger: logger.Named("client"),
})
require.NoError(t, err)
t.Cleanup(func() {
_ = conn.Close()
})
clientID := uuid.New()
testCtx, testCtxCancel := context.WithCancel(context.Background())
t.Cleanup(testCtxCancel)
coordination := tailnet.NewInMemoryCoordination(
testCtx, logger,
clientID, manifest.AgentID,
coord, conn,
)
t.Cleanup(func() {
_ = coordination.Close()
})
return codersdk.NewWorkspaceAgentConn(conn, codersdk.WorkspaceAgentConnOptions{
AgentID: manifest.AgentID,
AgentIP: codersdk.WorkspaceAgentIP,
CloseFunc: func() error { return codersdk.ErrSkipClose },
}), nil
}, 0)

serverTailnet, err := coderd.NewServerTailnet(
context.Background(),
logger,
derpServer,
func() *tailcfg.DERPMap { return manifest.DERPMap },
false,
func(context.Context) (tailnet.MultiAgentConn, error) { return coord.ServeMultiAgent(uuid.New()), nil },
cache,
trace.NewNoopTracerProvider(),
)
require.NoError(t, err)
Expand Down
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