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Commit1fc74f6

Browse files
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refactor(agent): update agentcontainers api initialization (#17600)
There were too many ways to configure the agentcontainers API resultingin inconsistent behavior or features not being enabled. This refactorintroduces a control flag for enabling or disabling the containers API.When disabled, all implementations are no-op and explicit endpointbehaviors are defined. When enabled, concrete implementations are usedby default but can be overridden by passing options.
1 parent22b932a commit1fc74f6

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12 files changed

+118
-67
lines changed

12 files changed

+118
-67
lines changed

‎agent/agent.go

Lines changed: 10 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -89,9 +89,9 @@ type Options struct {
8989
ServiceBannerRefreshInterval time.Duration
9090
BlockFileTransferbool
9191
Execer agentexec.Execer
92-
ContainerLister agentcontainers.Lister
9392

9493
ExperimentalDevcontainersEnabledbool
94+
ContainerAPIOptions []agentcontainers.Option// Enable ExperimentalDevcontainersEnabled for these to be effective.
9595
}
9696

9797
typeClientinterface {
@@ -154,9 +154,6 @@ func New(options Options) Agent {
154154
ifoptions.Execer==nil {
155155
options.Execer=agentexec.DefaultExecer
156156
}
157-
ifoptions.ContainerLister==nil {
158-
options.ContainerLister= agentcontainers.NoopLister{}
159-
}
160157

161158
hardCtx,hardCancel:=context.WithCancel(context.Background())
162159
gracefulCtx,gracefulCancel:=context.WithCancel(hardCtx)
@@ -192,9 +189,9 @@ func New(options Options) Agent {
192189
prometheusRegistry:prometheusRegistry,
193190
metrics:newAgentMetrics(prometheusRegistry),
194191
execer:options.Execer,
195-
lister:options.ContainerLister,
196192

197193
experimentalDevcontainersEnabled:options.ExperimentalDevcontainersEnabled,
194+
containerAPIOptions:options.ContainerAPIOptions,
198195
}
199196
// Initially, we have a closed channel, reflecting the fact that we are not initially connected.
200197
// Each time we connect we replace the channel (while holding the closeMutex) with a new one
@@ -274,9 +271,10 @@ type agent struct {
274271
// labeled in Coder with the agent + workspace.
275272
metrics*agentMetrics
276273
execer agentexec.Execer
277-
lister agentcontainers.Lister
278274

279275
experimentalDevcontainersEnabledbool
276+
containerAPIOptions []agentcontainers.Option
277+
containerAPI atomic.Pointer[agentcontainers.API]// Set by apiHandler.
280278
}
281279

282280
func (a*agent)TailnetConn()*tailnet.Conn {
@@ -1170,6 +1168,12 @@ func (a *agent) handleManifest(manifestOK *checkpoint) func(ctx context.Context,
11701168
}
11711169
a.metrics.startupScriptSeconds.WithLabelValues(label).Set(dur)
11721170
a.scriptRunner.StartCron()
1171+
ifcontainerAPI:=a.containerAPI.Load();containerAPI!=nil {
1172+
// Inform the container API that the agent is ready.
1173+
// This allows us to start watching for changes to
1174+
// the devcontainer configuration files.
1175+
containerAPI.SignalReady()
1176+
}
11731177
})
11741178
iferr!=nil {
11751179
returnxerrors.Errorf("track conn goroutine: %w",err)

‎agent/agentcontainers/api.go

Lines changed: 47 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -39,6 +39,7 @@ type API struct {
3939
watcher watcher.Watcher
4040

4141
cacheDuration time.Duration
42+
execer agentexec.Execer
4243
clLister
4344
dccliDevcontainerCLI
4445
clock quartz.Clock
@@ -56,14 +57,6 @@ type API struct {
5657
// Option is a functional option for API.
5758
typeOptionfunc(*API)
5859

59-
// WithLister sets the agentcontainers.Lister implementation to use.
60-
// The default implementation uses the Docker CLI to list containers.
61-
funcWithLister(clLister)Option {
62-
returnfunc(api*API) {
63-
api.cl=cl
64-
}
65-
}
66-
6760
// WithClock sets the quartz.Clock implementation to use.
6861
// This is primarily used for testing to control time.
6962
funcWithClock(clock quartz.Clock)Option {
@@ -72,6 +65,21 @@ func WithClock(clock quartz.Clock) Option {
7265
}
7366
}
7467

68+
// WithExecer sets the agentexec.Execer implementation to use.
69+
funcWithExecer(execer agentexec.Execer)Option {
70+
returnfunc(api*API) {
71+
api.execer=execer
72+
}
73+
}
74+
75+
// WithLister sets the agentcontainers.Lister implementation to use.
76+
// The default implementation uses the Docker CLI to list containers.
77+
funcWithLister(clLister)Option {
78+
returnfunc(api*API) {
79+
api.cl=cl
80+
}
81+
}
82+
7583
// WithDevcontainerCLI sets the DevcontainerCLI implementation to use.
7684
// This can be used in tests to modify @devcontainer/cli behavior.
7785
funcWithDevcontainerCLI(dccliDevcontainerCLI)Option {
@@ -113,6 +121,7 @@ func NewAPI(logger slog.Logger, options ...Option) *API {
113121
done:make(chanstruct{}),
114122
logger:logger,
115123
clock:quartz.NewReal(),
124+
execer:agentexec.DefaultExecer,
116125
cacheDuration:defaultGetContainersCacheDuration,
117126
lockCh:make(chanstruct{},1),
118127
devcontainerNames:make(map[string]struct{}),
@@ -123,30 +132,46 @@ func NewAPI(logger slog.Logger, options ...Option) *API {
123132
opt(api)
124133
}
125134
ifapi.cl==nil {
126-
api.cl=&DockerCLILister{}
135+
api.cl=NewDocker(api.execer)
127136
}
128137
ifapi.dccli==nil {
129-
api.dccli=NewDevcontainerCLI(logger.Named("devcontainer-cli"),agentexec.DefaultExecer)
138+
api.dccli=NewDevcontainerCLI(logger.Named("devcontainer-cli"),api.execer)
130139
}
131140
ifapi.watcher==nil {
132-
api.watcher=watcher.NewNoop()
141+
varerrerror
142+
api.watcher,err=watcher.NewFSNotify()
143+
iferr!=nil {
144+
logger.Error(ctx,"create file watcher service failed",slog.Error(err))
145+
api.watcher=watcher.NewNoop()
146+
}
133147
}
134148

149+
goapi.loop()
150+
151+
returnapi
152+
}
153+
154+
// SignalReady signals the API that we are ready to begin watching for
155+
// file changes. This is used to prime the cache with the current list
156+
// of containers and to start watching the devcontainer config files for
157+
// changes. It should be called after the agent ready.
158+
func (api*API)SignalReady() {
159+
// Prime the cache with the current list of containers.
160+
_,_=api.cl.List(api.ctx)
161+
135162
// Make sure we watch the devcontainer config files for changes.
136163
for_,devcontainer:=rangeapi.knownDevcontainers {
137-
ifdevcontainer.ConfigPath!="" {
138-
iferr:=api.watcher.Add(devcontainer.ConfigPath);err!=nil {
139-
api.logger.Error(ctx,"watch devcontainer config file failed",slog.Error(err),slog.F("file",devcontainer.ConfigPath))
140-
}
164+
ifdevcontainer.ConfigPath=="" {
165+
continue
141166
}
142-
}
143167

144-
goapi.start()
145-
146-
returnapi
168+
iferr:=api.watcher.Add(devcontainer.ConfigPath);err!=nil {
169+
api.logger.Error(api.ctx,"watch devcontainer config file failed",slog.Error(err),slog.F("file",devcontainer.ConfigPath))
170+
}
171+
}
147172
}
148173

149-
func (api*API)start() {
174+
func (api*API)loop() {
150175
deferclose(api.done)
151176

152177
for {
@@ -187,9 +212,11 @@ func (api *API) start() {
187212
// Routes returns the HTTP handler for container-related routes.
188213
func (api*API)Routes() http.Handler {
189214
r:=chi.NewRouter()
215+
190216
r.Get("/",api.handleList)
191217
r.Get("/devcontainers",api.handleListDevcontainers)
192218
r.Post("/{id}/recreate",api.handleRecreate)
219+
193220
returnr
194221
}
195222

‎agent/agentcontainers/api_test.go

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -18,6 +18,7 @@ import (
1818
"cdr.dev/slog"
1919
"cdr.dev/slog/sloggers/slogtest"
2020
"github.com/coder/coder/v2/agent/agentcontainers"
21+
"github.com/coder/coder/v2/agent/agentcontainers/watcher"
2122
"github.com/coder/coder/v2/codersdk"
2223
"github.com/coder/coder/v2/testutil"
2324
"github.com/coder/quartz"
@@ -253,6 +254,7 @@ func TestAPI(t *testing.T) {
253254
logger,
254255
agentcontainers.WithLister(tt.lister),
255256
agentcontainers.WithDevcontainerCLI(tt.devcontainerCLI),
257+
agentcontainers.WithWatcher(watcher.NewNoop()),
256258
)
257259
deferapi.Close()
258260
r.Mount("/",api.Routes())
@@ -558,6 +560,7 @@ func TestAPI(t *testing.T) {
558560
r:=chi.NewRouter()
559561
apiOptions:= []agentcontainers.Option{
560562
agentcontainers.WithLister(tt.lister),
563+
agentcontainers.WithWatcher(watcher.NewNoop()),
561564
}
562565

563566
iflen(tt.knownDevcontainers)>0 {
@@ -631,6 +634,8 @@ func TestAPI(t *testing.T) {
631634
)
632635
deferapi.Close()
633636

637+
api.SignalReady()
638+
634639
r:=chi.NewRouter()
635640
r.Mount("/",api.Routes())
636641

‎agent/api.go

Lines changed: 21 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -37,23 +37,35 @@ func (a *agent) apiHandler() (http.Handler, func() error) {
3737
cacheDuration:cacheDuration,
3838
}
3939

40-
containerAPIOpts:= []agentcontainers.Option{
41-
agentcontainers.WithLister(a.lister),
42-
}
4340
ifa.experimentalDevcontainersEnabled {
41+
containerAPIOpts:= []agentcontainers.Option{
42+
agentcontainers.WithExecer(a.execer),
43+
}
4444
manifest:=a.manifest.Load()
4545
ifmanifest!=nil&&len(manifest.Devcontainers)>0 {
4646
containerAPIOpts=append(
4747
containerAPIOpts,
4848
agentcontainers.WithDevcontainers(manifest.Devcontainers),
4949
)
5050
}
51+
52+
// Append after to allow the agent options to override the default options.
53+
containerAPIOpts=append(containerAPIOpts,a.containerAPIOptions...)
54+
55+
containerAPI:=agentcontainers.NewAPI(a.logger.Named("containers"),containerAPIOpts...)
56+
r.Mount("/api/v0/containers",containerAPI.Routes())
57+
a.containerAPI.Store(containerAPI)
58+
}else {
59+
r.HandleFunc("/api/v0/containers",func(w http.ResponseWriter,r*http.Request) {
60+
httpapi.Write(r.Context(),w,http.StatusForbidden, codersdk.Response{
61+
Message:"The agent dev containers feature is experimental and not enabled by default.",
62+
Detail:"To enable this feature, set CODER_AGENT_DEVCONTAINERS_ENABLE=true in your template.",
63+
})
64+
})
5165
}
52-
containerAPI:=agentcontainers.NewAPI(a.logger.Named("containers"),containerAPIOpts...)
5366

5467
promHandler:=PrometheusMetricsHandler(a.prometheusRegistry,a.logger)
5568

56-
r.Mount("/api/v0/containers",containerAPI.Routes())
5769
r.Get("/api/v0/listening-ports",lp.handler)
5870
r.Get("/api/v0/netcheck",a.HandleNetcheck)
5971
r.Post("/api/v0/list-directory",a.HandleLS)
@@ -64,7 +76,10 @@ func (a *agent) apiHandler() (http.Handler, func() error) {
6476
r.Get("/debug/prometheus",promHandler.ServeHTTP)
6577

6678
returnr,func()error {
67-
returncontainerAPI.Close()
79+
ifcontainerAPI:=a.containerAPI.Load();containerAPI!=nil {
80+
returncontainerAPI.Close()
81+
}
82+
returnnil
6883
}
6984
}
7085

‎cli/agent.go

Lines changed: 3 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,6 @@ import (
2626
"cdr.dev/slog/sloggers/slogjson"
2727
"cdr.dev/slog/sloggers/slogstackdriver"
2828
"github.com/coder/coder/v2/agent"
29-
"github.com/coder/coder/v2/agent/agentcontainers"
3029
"github.com/coder/coder/v2/agent/agentexec"
3130
"github.com/coder/coder/v2/agent/agentssh"
3231
"github.com/coder/coder/v2/agent/reaper"
@@ -319,13 +318,10 @@ func (r *RootCmd) workspaceAgent() *serpent.Command {
319318
returnxerrors.Errorf("create agent execer: %w",err)
320319
}
321320

322-
varcontainerLister agentcontainers.Lister
323-
if!experimentalDevcontainersEnabled {
324-
logger.Info(ctx,"agent devcontainer detection not enabled")
325-
containerLister=&agentcontainers.NoopLister{}
326-
}else {
321+
ifexperimentalDevcontainersEnabled {
327322
logger.Info(ctx,"agent devcontainer detection enabled")
328-
containerLister=agentcontainers.NewDocker(execer)
323+
}else {
324+
logger.Info(ctx,"agent devcontainer detection not enabled")
329325
}
330326

331327
agnt:=agent.New(agent.Options{
@@ -354,7 +350,6 @@ func (r *RootCmd) workspaceAgent() *serpent.Command {
354350
PrometheusRegistry:prometheusRegistry,
355351
BlockFileTransfer:blockFileTransfer,
356352
Execer:execer,
357-
ContainerLister:containerLister,
358353

359354
ExperimentalDevcontainersEnabled:experimentalDevcontainersEnabled,
360355
})

‎cli/exp_rpty_test.go

Lines changed: 0 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,6 @@ import (
99
"github.com/ory/dockertest/v3/docker"
1010

1111
"github.com/coder/coder/v2/agent"
12-
"github.com/coder/coder/v2/agent/agentcontainers"
1312
"github.com/coder/coder/v2/agent/agenttest"
1413
"github.com/coder/coder/v2/cli/clitest"
1514
"github.com/coder/coder/v2/coderd/coderdtest"
@@ -112,7 +111,6 @@ func TestExpRpty(t *testing.T) {
112111

113112
_=agenttest.New(t,client.URL,agentToken,func(o*agent.Options) {
114113
o.ExperimentalDevcontainersEnabled=true
115-
o.ContainerLister=agentcontainers.NewDocker(o.Execer)
116114
})
117115
_=coderdtest.NewWorkspaceAgentWaiter(t,client,workspace.ID).Wait()
118116

‎cli/open_test.go

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -14,6 +14,7 @@ import (
1414
"go.uber.org/mock/gomock"
1515

1616
"github.com/coder/coder/v2/agent"
17+
"github.com/coder/coder/v2/agent/agentcontainers"
1718
"github.com/coder/coder/v2/agent/agentcontainers/acmock"
1819
"github.com/coder/coder/v2/agent/agenttest"
1920
"github.com/coder/coder/v2/cli/clitest"
@@ -335,7 +336,8 @@ func TestOpenVSCodeDevContainer(t *testing.T) {
335336
})
336337

337338
_=agenttest.New(t,client.URL,agentToken,func(o*agent.Options) {
338-
o.ContainerLister=mcl
339+
o.ExperimentalDevcontainersEnabled=true
340+
o.ContainerAPIOptions=append(o.ContainerAPIOptions,agentcontainers.WithLister(mcl))
339341
})
340342
_=coderdtest.NewWorkspaceAgentWaiter(t,client,workspace.ID).Wait()
341343

@@ -508,7 +510,8 @@ func TestOpenVSCodeDevContainer_NoAgentDirectory(t *testing.T) {
508510
})
509511

510512
_=agenttest.New(t,client.URL,agentToken,func(o*agent.Options) {
511-
o.ContainerLister=mcl
513+
o.ExperimentalDevcontainersEnabled=true
514+
o.ContainerAPIOptions=append(o.ContainerAPIOptions,agentcontainers.WithLister(mcl))
512515
})
513516
_=coderdtest.NewWorkspaceAgentWaiter(t,client,workspace.ID).Wait()
514517

‎cli/ssh.go

Lines changed: 0 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -299,8 +299,6 @@ func (r *RootCmd) ssh() *serpent.Command {
299299
}
300300
iflen(cts.Containers)==0 {
301301
cliui.Info(inv.Stderr,"No containers found!")
302-
cliui.Info(inv.Stderr,"Tip: Agent container integration is experimental and not enabled by default.")
303-
cliui.Info(inv.Stderr," To enable it, set CODER_AGENT_DEVCONTAINERS_ENABLE=true in your template.")
304302
returnnil
305303
}
306304
varfoundbool

‎cli/ssh_test.go

Lines changed: 3 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -2029,7 +2029,6 @@ func TestSSH_Container(t *testing.T) {
20292029

20302030
_=agenttest.New(t,client.URL,agentToken,func(o*agent.Options) {
20312031
o.ExperimentalDevcontainersEnabled=true
2032-
o.ContainerLister=agentcontainers.NewDocker(o.Execer)
20332032
})
20342033
_=coderdtest.NewWorkspaceAgentWaiter(t,client,workspace.ID).Wait()
20352034

@@ -2058,7 +2057,7 @@ func TestSSH_Container(t *testing.T) {
20582057
mLister:=acmock.NewMockLister(ctrl)
20592058
_=agenttest.New(t,client.URL,agentToken,func(o*agent.Options) {
20602059
o.ExperimentalDevcontainersEnabled=true
2061-
o.ContainerLister=mLister
2060+
o.ContainerAPIOptions=append(o.ContainerAPIOptions,agentcontainers.WithLister(mLister))
20622061
})
20632062
_=coderdtest.NewWorkspaceAgentWaiter(t,client,workspace.ID).Wait()
20642063

@@ -2097,16 +2096,9 @@ func TestSSH_Container(t *testing.T) {
20972096

20982097
inv,root:=clitest.New(t,"ssh",workspace.Name,"-c",uuid.NewString())
20992098
clitest.SetupConfig(t,client,root)
2100-
ptty:=ptytest.New(t).Attach(inv)
2101-
2102-
cmdDone:=tGo(t,func() {
2103-
err:=inv.WithContext(ctx).Run()
2104-
assert.NoError(t,err)
2105-
})
21062099

2107-
ptty.ExpectMatch("No containers found!")
2108-
ptty.ExpectMatch("Tip: Agent container integration is experimental and not enabled by default.")
2109-
<-cmdDone
2100+
err:=inv.WithContext(ctx).Run()
2101+
require.ErrorContains(t,err,"The agent dev containers feature is experimental and not enabled by default.")
21102102
})
21112103
}
21122104

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