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workspaceagents.go
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workspaceagents.go
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package coderd
import (
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"io"
"net"
"net/http"
"net/netip"
"net/url"
"reflect"
"strconv"
"strings"
"time"
"github.com/google/uuid"
"go.opentelemetry.io/otel/trace"
"golang.org/x/mod/semver"
"golang.org/x/oauth2"
"golang.org/x/xerrors"
"nhooyr.io/websocket"
"nhooyr.io/websocket/wsjson"
"tailscale.com/tailcfg"
"cdr.dev/slog"
"github.com/coder/coder/coderd/database"
"github.com/coder/coder/coderd/gitauth"
"github.com/coder/coder/coderd/httpapi"
"github.com/coder/coder/coderd/httpmw"
"github.com/coder/coder/coderd/rbac"
"github.com/coder/coder/coderd/tracing"
"github.com/coder/coder/codersdk"
"github.com/coder/coder/tailnet"
)
func (api *API) workspaceAgent(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspaceAgent := httpmw.WorkspaceAgentParam(r)
workspace := httpmw.WorkspaceParam(r)
if !api.Authorize(r, rbac.ActionRead, workspace) {
httpapi.ResourceNotFound(rw)
return
}
dbApps, err := api.Database.GetWorkspaceAppsByAgentID(ctx, workspaceAgent.ID)
if err != nil && !xerrors.Is(err, sql.ErrNoRows) {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace agent applications.",
Detail: err.Error(),
})
return
}
apiAgent, err := convertWorkspaceAgent(api.DERPMap, *api.TailnetCoordinator.Load(), workspaceAgent, convertApps(dbApps), api.AgentInactiveDisconnectTimeout)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error reading workspace agent.",
Detail: err.Error(),
})
return
}
httpapi.Write(ctx, rw, http.StatusOK, apiAgent)
}
func (api *API) workspaceAgentMetadata(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspaceAgent := httpmw.WorkspaceAgent(r)
apiAgent, err := convertWorkspaceAgent(api.DERPMap, *api.TailnetCoordinator.Load(), workspaceAgent, nil, api.AgentInactiveDisconnectTimeout)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error reading workspace agent.",
Detail: err.Error(),
})
return
}
dbApps, err := api.Database.GetWorkspaceAppsByAgentID(r.Context(), workspaceAgent.ID)
if err != nil && !xerrors.Is(err, sql.ErrNoRows) {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace agent applications.",
Detail: err.Error(),
})
return
}
resource, err := api.Database.GetWorkspaceResourceByID(r.Context(), workspaceAgent.ResourceID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace resource.",
Detail: err.Error(),
})
return
}
build, err := api.Database.GetWorkspaceBuildByJobID(r.Context(), resource.JobID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace build.",
Detail: err.Error(),
})
return
}
workspace, err := api.Database.GetWorkspaceByID(r.Context(), build.WorkspaceID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace.",
Detail: err.Error(),
})
return
}
owner, err := api.Database.GetUserByID(r.Context(), workspace.OwnerID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace owner.",
Detail: err.Error(),
})
return
}
vscodeProxyURI := strings.ReplaceAll(api.AppHostname, "*",
fmt.Sprintf("%s://{{port}}--%s--%s--%s",
api.AccessURL.Scheme,
workspaceAgent.Name,
workspace.Name,
owner.Username,
))
httpapi.Write(ctx, rw, http.StatusOK, codersdk.WorkspaceAgentMetadata{
Apps: convertApps(dbApps),
DERPMap: api.DERPMap,
GitAuthConfigs: len(api.GitAuthConfigs),
EnvironmentVariables: apiAgent.EnvironmentVariables,
StartupScript: apiAgent.StartupScript,
Directory: apiAgent.Directory,
VSCodePortProxyURI: vscodeProxyURI,
})
}
func (api *API) postWorkspaceAgentVersion(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspaceAgent := httpmw.WorkspaceAgent(r)
apiAgent, err := convertWorkspaceAgent(api.DERPMap, *api.TailnetCoordinator.Load(), workspaceAgent, nil, api.AgentInactiveDisconnectTimeout)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error reading workspace agent.",
Detail: err.Error(),
})
return
}
var req codersdk.PostWorkspaceAgentVersionRequest
if !httpapi.Read(ctx, rw, r, &req) {
return
}
api.Logger.Info(ctx, "post workspace agent version", slog.F("agent_id", apiAgent.ID), slog.F("agent_version", req.Version))
if !semver.IsValid(req.Version) {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Invalid workspace agent version provided.",
Detail: fmt.Sprintf("invalid semver version: %q", req.Version),
})
return
}
if err := api.Database.UpdateWorkspaceAgentVersionByID(ctx, database.UpdateWorkspaceAgentVersionByIDParams{
ID: apiAgent.ID,
Version: req.Version,
}); err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Error setting agent version",
Detail: err.Error(),
})
return
}
httpapi.Write(ctx, rw, http.StatusOK, nil)
}
// workspaceAgentPTY spawns a PTY and pipes it over a WebSocket.
// This is used for the web terminal.
func (api *API) workspaceAgentPTY(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
api.websocketWaitMutex.Lock()
api.websocketWaitGroup.Add(1)
api.websocketWaitMutex.Unlock()
defer api.websocketWaitGroup.Done()
workspaceAgent := httpmw.WorkspaceAgentParam(r)
workspace := httpmw.WorkspaceParam(r)
if !api.Authorize(r, rbac.ActionCreate, workspace.ExecutionRBAC()) {
httpapi.ResourceNotFound(rw)
return
}
apiAgent, err := convertWorkspaceAgent(api.DERPMap, *api.TailnetCoordinator.Load(), workspaceAgent, nil, api.AgentInactiveDisconnectTimeout)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error reading workspace agent.",
Detail: err.Error(),
})
return
}
if apiAgent.Status != codersdk.WorkspaceAgentConnected {
httpapi.Write(ctx, rw, http.StatusPreconditionRequired, codersdk.Response{
Message: fmt.Sprintf("Agent state is %q, it must be in the %q state.", apiAgent.Status, codersdk.WorkspaceAgentConnected),
})
return
}
reconnect, err := uuid.Parse(r.URL.Query().Get("reconnect"))
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Query param 'reconnect' must be a valid UUID.",
Validations: []codersdk.ValidationError{
{Field: "reconnect", Detail: "invalid UUID"},
},
})
return
}
height, err := strconv.Atoi(r.URL.Query().Get("height"))
if err != nil {
height = 80
}
width, err := strconv.Atoi(r.URL.Query().Get("width"))
if err != nil {
width = 80
}
conn, err := websocket.Accept(rw, r, &websocket.AcceptOptions{
CompressionMode: websocket.CompressionDisabled,
})
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to accept websocket.",
Detail: err.Error(),
})
return
}
go httpapi.Heartbeat(ctx, conn)
_, wsNetConn := websocketNetConn(ctx, conn, websocket.MessageBinary)
defer wsNetConn.Close() // Also closes conn.
agentConn, release, err := api.workspaceAgentCache.Acquire(r, workspaceAgent.ID)
if err != nil {
_ = conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("dial workspace agent: %s", err))
return
}
defer release()
ptNetConn, err := agentConn.ReconnectingPTY(reconnect.String(), uint16(height), uint16(width), r.URL.Query().Get("command"))
if err != nil {
_ = conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("dial: %s", err))
return
}
defer ptNetConn.Close()
// Pipe the ends together!
go func() {
_, _ = io.Copy(wsNetConn, ptNetConn)
}()
_, _ = io.Copy(ptNetConn, wsNetConn)
}
func (api *API) workspaceAgentListeningPorts(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspace := httpmw.WorkspaceParam(r)
workspaceAgent := httpmw.WorkspaceAgentParam(r)
if !api.Authorize(r, rbac.ActionRead, workspace) {
httpapi.ResourceNotFound(rw)
return
}
apiAgent, err := convertWorkspaceAgent(api.DERPMap, *api.TailnetCoordinator.Load(), workspaceAgent, nil, api.AgentInactiveDisconnectTimeout)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error reading workspace agent.",
Detail: err.Error(),
})
return
}
if apiAgent.Status != codersdk.WorkspaceAgentConnected {
httpapi.Write(ctx, rw, http.StatusPreconditionRequired, codersdk.Response{
Message: fmt.Sprintf("Agent state is %q, it must be in the %q state.", apiAgent.Status, codersdk.WorkspaceAgentConnected),
})
return
}
agentConn, release, err := api.workspaceAgentCache.Acquire(r, workspaceAgent.ID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error dialing workspace agent.",
Detail: err.Error(),
})
return
}
defer release()
portsResponse, err := agentConn.ListeningPorts(ctx)
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching listening ports.",
Detail: err.Error(),
})
return
}
// Get a list of ports that are in-use by applications.
apps, err := api.Database.GetWorkspaceAppsByAgentID(ctx, workspaceAgent.ID)
if xerrors.Is(err, sql.ErrNoRows) {
apps = []database.WorkspaceApp{}
err = nil
}
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace apps.",
Detail: err.Error(),
})
return
}
appPorts := make(map[uint16]struct{}, len(apps))
for _, app := range apps {
if !app.Url.Valid || app.Url.String == "" {
continue
}
u, err := url.Parse(app.Url.String)
if err != nil {
continue
}
port := u.Port()
if port == "" {
continue
}
portNum, err := strconv.Atoi(port)
if err != nil {
continue
}
if portNum < 1 || portNum > 65535 {
continue
}
appPorts[uint16(portNum)] = struct{}{}
}
// Filter out ports that are globally blocked, in-use by applications, or
// common non-HTTP ports such as databases, FTP, SSH, etc.
filteredPorts := make([]codersdk.ListeningPort, 0, len(portsResponse.Ports))
for _, port := range portsResponse.Ports {
if port.Port < uint16(codersdk.MinimumListeningPort) {
continue
}
if _, ok := appPorts[port.Port]; ok {
continue
}
if _, ok := codersdk.IgnoredListeningPorts[port.Port]; ok {
continue
}
filteredPorts = append(filteredPorts, port)
}
portsResponse.Ports = filteredPorts
httpapi.Write(ctx, rw, http.StatusOK, portsResponse)
}
func (api *API) dialWorkspaceAgentTailnet(r *http.Request, agentID uuid.UUID) (*codersdk.AgentConn, error) {
clientConn, serverConn := net.Pipe()
go func() {
<-r.Context().Done()
_ = clientConn.Close()
_ = serverConn.Close()
}()
derpMap := api.DERPMap.Clone()
for _, region := range derpMap.Regions {
if !region.EmbeddedRelay {
continue
}
var node *tailcfg.DERPNode
for _, n := range region.Nodes {
if n.STUNOnly {
continue
}
node = n
break
}
if node == nil {
continue
}
// TODO: This should dial directly to execute the
// DERP server instead of contacting localhost.
//
// This requires modification of Tailscale internals
// to pipe through a proxy function per-region, so
// this is an easy and mostly reliable hack for now.
cloned := node.Clone()
// Add p for proxy.
// This first node supports TLS.
cloned.Name += "p"
cloned.IPv4 = "127.0.0.1"
cloned.InsecureForTests = true
region.Nodes = append(region.Nodes, cloned.Clone())
// This second node forces HTTP.
cloned.Name += "-http"
cloned.ForceHTTP = true
region.Nodes = append(region.Nodes, cloned)
}
conn, err := tailnet.NewConn(&tailnet.Options{
Addresses: []netip.Prefix{netip.PrefixFrom(tailnet.IP(), 128)},
DERPMap: derpMap,
Logger: api.Logger.Named("tailnet"),
})
if err != nil {
return nil, xerrors.Errorf("create tailnet conn: %w", err)
}
sendNodes, _ := tailnet.ServeCoordinator(clientConn, func(node []*tailnet.Node) error {
return conn.UpdateNodes(node)
})
conn.SetNodeCallback(sendNodes)
go func() {
err := (*api.TailnetCoordinator.Load()).ServeClient(serverConn, uuid.New(), agentID)
if err != nil {
api.Logger.Warn(r.Context(), "tailnet coordinator client error", slog.Error(err))
_ = conn.Close()
}
}()
return &codersdk.AgentConn{
Conn: conn,
}, nil
}
func (api *API) workspaceAgentConnection(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspace := httpmw.WorkspaceParam(r)
if !api.Authorize(r, rbac.ActionRead, workspace) {
httpapi.ResourceNotFound(rw)
return
}
httpapi.Write(ctx, rw, http.StatusOK, codersdk.WorkspaceAgentConnectionInfo{
DERPMap: api.DERPMap,
})
}
func (api *API) workspaceAgentCoordinate(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
api.websocketWaitMutex.Lock()
api.websocketWaitGroup.Add(1)
api.websocketWaitMutex.Unlock()
defer api.websocketWaitGroup.Done()
workspaceAgent := httpmw.WorkspaceAgent(r)
resource, err := api.Database.GetWorkspaceResourceByID(ctx, workspaceAgent.ResourceID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to accept websocket.",
Detail: err.Error(),
})
return
}
build, err := api.Database.GetWorkspaceBuildByJobID(ctx, resource.JobID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Internal error fetching workspace build job.",
Detail: err.Error(),
})
return
}
// Ensure the resource is still valid!
// We only accept agents for resources on the latest build.
ensureLatestBuild := func() error {
latestBuild, err := api.Database.GetLatestWorkspaceBuildByWorkspaceID(ctx, build.WorkspaceID)
if err != nil {
return err
}
if build.ID != latestBuild.ID {
return xerrors.New("build is outdated")
}
return nil
}
err = ensureLatestBuild()
if err != nil {
api.Logger.Debug(ctx, "agent tried to connect from non-latest built",
slog.F("resource", resource),
slog.F("agent", workspaceAgent),
)
httpapi.Write(ctx, rw, http.StatusForbidden, codersdk.Response{
Message: "Agent trying to connect from non-latest build.",
Detail: err.Error(),
})
return
}
conn, err := websocket.Accept(rw, r, nil)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to accept websocket.",
Detail: err.Error(),
})
return
}
go httpapi.Heartbeat(ctx, conn)
ctx, wsNetConn := websocketNetConn(ctx, conn, websocket.MessageBinary)
defer wsNetConn.Close()
firstConnectedAt := workspaceAgent.FirstConnectedAt
if !firstConnectedAt.Valid {
firstConnectedAt = sql.NullTime{
Time: database.Now(),
Valid: true,
}
}
lastConnectedAt := sql.NullTime{
Time: database.Now(),
Valid: true,
}
disconnectedAt := workspaceAgent.DisconnectedAt
updateConnectionTimes := func() error {
err = api.Database.UpdateWorkspaceAgentConnectionByID(ctx, database.UpdateWorkspaceAgentConnectionByIDParams{
ID: workspaceAgent.ID,
FirstConnectedAt: firstConnectedAt,
LastConnectedAt: lastConnectedAt,
DisconnectedAt: disconnectedAt,
UpdatedAt: database.Now(),
LastConnectedReplicaID: uuid.NullUUID{
UUID: api.ID,
Valid: true,
},
})
if err != nil {
return err
}
return nil
}
defer func() {
disconnectedAt = sql.NullTime{
Time: database.Now(),
Valid: true,
}
_ = updateConnectionTimes()
_ = api.Pubsub.Publish(watchWorkspaceChannel(build.WorkspaceID), []byte{})
}()
err = updateConnectionTimes()
if err != nil {
_ = conn.Close(websocket.StatusGoingAway, err.Error())
return
}
api.publishWorkspaceUpdate(ctx, build.WorkspaceID)
// End span so we don't get long lived trace data.
tracing.EndHTTPSpan(r, http.StatusOK, trace.SpanFromContext(ctx))
// Ignore all trace spans after this.
ctx = trace.ContextWithSpan(ctx, tracing.NoopSpan)
api.Logger.Info(ctx, "accepting agent", slog.F("agent", workspaceAgent))
defer conn.Close(websocket.StatusNormalClosure, "")
closeChan := make(chan struct{})
go func() {
defer close(closeChan)
err := (*api.TailnetCoordinator.Load()).ServeAgent(wsNetConn, workspaceAgent.ID)
if err != nil {
api.Logger.Warn(ctx, "tailnet coordinator agent error", slog.Error(err))
_ = conn.Close(websocket.StatusInternalError, err.Error())
return
}
}()
ticker := time.NewTicker(api.AgentConnectionUpdateFrequency)
defer ticker.Stop()
for {
select {
case <-closeChan:
return
case <-ticker.C:
}
lastConnectedAt = sql.NullTime{
Time: database.Now(),
Valid: true,
}
err = updateConnectionTimes()
if err != nil {
_ = conn.Close(websocket.StatusGoingAway, err.Error())
return
}
err := ensureLatestBuild()
if err != nil {
// Disconnect agents that are no longer valid.
_ = conn.Close(websocket.StatusGoingAway, "")
return
}
}
}
// workspaceAgentClientCoordinate accepts a WebSocket that reads node network updates.
// After accept a PubSub starts listening for new connection node updates
// which are written to the WebSocket.
func (api *API) workspaceAgentClientCoordinate(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
workspace := httpmw.WorkspaceParam(r)
if !api.Authorize(r, rbac.ActionCreate, workspace.ExecutionRBAC()) {
httpapi.ResourceNotFound(rw)
return
}
// This is used by Enterprise code to control the functionality of this route.
override := api.WorkspaceClientCoordinateOverride.Load()
if override != nil {
overrideFunc := *override
if overrideFunc != nil && overrideFunc(rw) {
return
}
}
api.websocketWaitMutex.Lock()
api.websocketWaitGroup.Add(1)
api.websocketWaitMutex.Unlock()
defer api.websocketWaitGroup.Done()
workspaceAgent := httpmw.WorkspaceAgentParam(r)
conn, err := websocket.Accept(rw, r, nil)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to accept websocket.",
Detail: err.Error(),
})
return
}
go httpapi.Heartbeat(ctx, conn)
defer conn.Close(websocket.StatusNormalClosure, "")
err = (*api.TailnetCoordinator.Load()).ServeClient(websocket.NetConn(ctx, conn, websocket.MessageBinary), uuid.New(), workspaceAgent.ID)
if err != nil {
_ = conn.Close(websocket.StatusInternalError, err.Error())
return
}
}
func convertApps(dbApps []database.WorkspaceApp) []codersdk.WorkspaceApp {
apps := make([]codersdk.WorkspaceApp, 0)
for _, dbApp := range dbApps {
apps = append(apps, codersdk.WorkspaceApp{
ID: dbApp.ID,
Slug: dbApp.Slug,
DisplayName: dbApp.DisplayName,
Command: dbApp.Command.String,
Icon: dbApp.Icon,
Subdomain: dbApp.Subdomain,
SharingLevel: codersdk.WorkspaceAppSharingLevel(dbApp.SharingLevel),
Healthcheck: codersdk.Healthcheck{
URL: dbApp.HealthcheckUrl,
Interval: dbApp.HealthcheckInterval,
Threshold: dbApp.HealthcheckThreshold,
},
Health: codersdk.WorkspaceAppHealth(dbApp.Health),
})
}
return apps
}
func convertWorkspaceAgent(derpMap *tailcfg.DERPMap, coordinator tailnet.Coordinator, dbAgent database.WorkspaceAgent, apps []codersdk.WorkspaceApp, agentInactiveDisconnectTimeout time.Duration) (codersdk.WorkspaceAgent, error) {
var envs map[string]string
if dbAgent.EnvironmentVariables.Valid {
err := json.Unmarshal(dbAgent.EnvironmentVariables.RawMessage, &envs)
if err != nil {
return codersdk.WorkspaceAgent{}, xerrors.Errorf("unmarshal env vars: %w", err)
}
}
workspaceAgent := codersdk.WorkspaceAgent{
ID: dbAgent.ID,
CreatedAt: dbAgent.CreatedAt,
UpdatedAt: dbAgent.UpdatedAt,
ResourceID: dbAgent.ResourceID,
InstanceID: dbAgent.AuthInstanceID.String,
Name: dbAgent.Name,
Architecture: dbAgent.Architecture,
OperatingSystem: dbAgent.OperatingSystem,
StartupScript: dbAgent.StartupScript.String,
Version: dbAgent.Version,
EnvironmentVariables: envs,
Directory: dbAgent.Directory,
Apps: apps,
}
node := coordinator.Node(dbAgent.ID)
if node != nil {
workspaceAgent.DERPLatency = map[string]codersdk.DERPRegion{}
for rawRegion, latency := range node.DERPLatency {
regionParts := strings.SplitN(rawRegion, "-", 2)
regionID, err := strconv.Atoi(regionParts[0])
if err != nil {
return codersdk.WorkspaceAgent{}, xerrors.Errorf("convert derp region id %q: %w", rawRegion, err)
}
region, found := derpMap.Regions[regionID]
if !found {
// It's possible that a workspace agent is using an old DERPMap
// and reports regions that do not exist. If that's the case,
// report the region as unknown!
region = &tailcfg.DERPRegion{
RegionID: regionID,
RegionName: fmt.Sprintf("Unnamed %d", regionID),
}
}
workspaceAgent.DERPLatency[region.RegionName] = codersdk.DERPRegion{
Preferred: node.PreferredDERP == regionID,
LatencyMilliseconds: latency * 1000,
}
}
}
if dbAgent.FirstConnectedAt.Valid {
workspaceAgent.FirstConnectedAt = &dbAgent.FirstConnectedAt.Time
}
if dbAgent.LastConnectedAt.Valid {
workspaceAgent.LastConnectedAt = &dbAgent.LastConnectedAt.Time
}
if dbAgent.DisconnectedAt.Valid {
workspaceAgent.DisconnectedAt = &dbAgent.DisconnectedAt.Time
}
switch {
case !dbAgent.FirstConnectedAt.Valid:
// If the agent never connected, it's waiting for the compute
// to start up.
workspaceAgent.Status = codersdk.WorkspaceAgentConnecting
case dbAgent.DisconnectedAt.Time.After(dbAgent.LastConnectedAt.Time):
// If we've disconnected after our last connection, we know the
// agent is no longer connected.
workspaceAgent.Status = codersdk.WorkspaceAgentDisconnected
case database.Now().Sub(dbAgent.LastConnectedAt.Time) > agentInactiveDisconnectTimeout:
// The connection died without updating the last connected.
workspaceAgent.Status = codersdk.WorkspaceAgentDisconnected
// Client code needs an accurate disconnected at if the agent has been inactive.
workspaceAgent.DisconnectedAt = &dbAgent.LastConnectedAt.Time
case dbAgent.LastConnectedAt.Valid:
// The agent should be assumed connected if it's under inactivity timeouts
// and last connected at has been properly set.
workspaceAgent.Status = codersdk.WorkspaceAgentConnected
}
return workspaceAgent, nil
}
func (api *API) workspaceAgentReportStats(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
api.websocketWaitMutex.Lock()
api.websocketWaitGroup.Add(1)
api.websocketWaitMutex.Unlock()
defer api.websocketWaitGroup.Done()
workspaceAgent := httpmw.WorkspaceAgent(r)
resource, err := api.Database.GetWorkspaceResourceByID(ctx, workspaceAgent.ResourceID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to get workspace resource.",
Detail: err.Error(),
})
return
}
build, err := api.Database.GetWorkspaceBuildByJobID(ctx, resource.JobID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to get build.",
Detail: err.Error(),
})
return
}
workspace, err := api.Database.GetWorkspaceByID(ctx, build.WorkspaceID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to get workspace.",
Detail: err.Error(),
})
return
}
conn, err := websocket.Accept(rw, r, &websocket.AcceptOptions{
CompressionMode: websocket.CompressionDisabled,
})
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to accept websocket.",
Detail: err.Error(),
})
return
}
go httpapi.Heartbeat(ctx, conn)
defer conn.Close(websocket.StatusGoingAway, "")
var lastReport codersdk.AgentStatsReportResponse
latestStat, err := api.Database.GetLatestAgentStat(ctx, workspaceAgent.ID)
if err == nil {
err = json.Unmarshal(latestStat.Payload, &lastReport)
if err != nil {
api.Logger.Debug(ctx, "unmarshal stat payload", slog.Error(err))
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("unmarshal stat payload: %s", err))
return
}
}
// Allow overriding the stat interval for debugging and testing purposes.
timer := time.NewTicker(api.AgentStatsRefreshInterval)
defer timer.Stop()
go func() {
for {
err := wsjson.Write(ctx, conn, codersdk.AgentStatsReportRequest{})
if err != nil {
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("write report request: %s", err))
return
}
select {
case <-timer.C:
continue
case <-ctx.Done():
conn.Close(websocket.StatusNormalClosure, "")
return
}
}
}()
for {
var rep codersdk.AgentStatsReportResponse
err = wsjson.Read(ctx, conn, &rep)
if err != nil {
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("read report response: %s", err))
return
}
repJSON, err := json.Marshal(rep)
if err != nil {
api.Logger.Debug(ctx, "marshal stat json", slog.Error(err))
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("marshal stat json: %s", err))
return
}
// Avoid inserting duplicate rows to preserve DB space.
// We will see duplicate reports when on idle connections
// (e.g. web terminal left open) or when there are no connections at
// all.
// We also don't want to update the workspace last used at on duplicate
// reports.
updateDB := !reflect.DeepEqual(lastReport, rep)
api.Logger.Debug(ctx, "read stats report",
slog.F("interval", api.AgentStatsRefreshInterval),
slog.F("agent", workspaceAgent.ID),
slog.F("resource", resource.ID),
slog.F("workspace", workspace.ID),
slog.F("update_db", updateDB),
slog.F("payload", rep),
)
if updateDB {
go activityBumpWorkspace(api.Logger.Named("activity_bump"), api.Database, workspace)
lastReport = rep
_, err = api.Database.InsertAgentStat(ctx, database.InsertAgentStatParams{
ID: uuid.New(),
CreatedAt: database.Now(),
AgentID: workspaceAgent.ID,
WorkspaceID: build.WorkspaceID,
UserID: workspace.OwnerID,
TemplateID: workspace.TemplateID,
Payload: json.RawMessage(repJSON),
})
if err != nil {
api.Logger.Debug(ctx, "insert agent stat", slog.Error(err))
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("insert agent stat: %s", err))
return
}
err = api.Database.UpdateWorkspaceLastUsedAt(ctx, database.UpdateWorkspaceLastUsedAtParams{
ID: build.WorkspaceID,
LastUsedAt: database.Now(),
})
if err != nil {
api.Logger.Debug(ctx, "update workspace last used at", slog.Error(err))
conn.Close(websocket.StatusInternalError, httpapi.WebsocketCloseSprintf("update workspace last used at: %s", err))
return
}
}
}
}
func (api *API) postWorkspaceAppHealth(rw http.ResponseWriter, r *http.Request) {
workspaceAgent := httpmw.WorkspaceAgent(r)
var req codersdk.PostWorkspaceAppHealthsRequest
if !httpapi.Read(r.Context(), rw, r, &req) {
return
}
if req.Healths == nil || len(req.Healths) == 0 {
httpapi.Write(r.Context(), rw, http.StatusBadRequest, codersdk.Response{
Message: "Health field is empty",
})
return
}
apps, err := api.Database.GetWorkspaceAppsByAgentID(r.Context(), workspaceAgent.ID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Error getting agent apps",
Detail: err.Error(),
})
return
}
var newApps []database.WorkspaceApp
for id, newHealth := range req.Healths {
old := func() *database.WorkspaceApp {
for _, app := range apps {
if app.ID == id {
return &app
}
}
return nil
}()
if old == nil {
httpapi.Write(r.Context(), rw, http.StatusNotFound, codersdk.Response{
Message: "Error setting workspace app health",
Detail: xerrors.Errorf("workspace app name %s not found", id).Error(),
})
return
}
if old.HealthcheckUrl == "" {
httpapi.Write(r.Context(), rw, http.StatusNotFound, codersdk.Response{
Message: "Error setting workspace app health",
Detail: xerrors.Errorf("health checking is disabled for workspace app %s", id).Error(),
})
return
}
switch newHealth {
case codersdk.WorkspaceAppHealthInitializing:
case codersdk.WorkspaceAppHealthHealthy:
case codersdk.WorkspaceAppHealthUnhealthy:
default:
httpapi.Write(r.Context(), rw, http.StatusBadRequest, codersdk.Response{
Message: "Error setting workspace app health",
Detail: xerrors.Errorf("workspace app health %s is not a valid value", newHealth).Error(),
})
return
}
// don't save if the value hasn't changed
if old.Health == database.WorkspaceAppHealth(newHealth) {
continue
}
old.Health = database.WorkspaceAppHealth(newHealth)
newApps = append(newApps, *old)
}
for _, app := range newApps {
err = api.Database.UpdateWorkspaceAppHealthByID(r.Context(), database.UpdateWorkspaceAppHealthByIDParams{
ID: app.ID,
Health: app.Health,
})
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Error setting workspace app health",
Detail: err.Error(),
})
return
}
}
resource, err := api.Database.GetWorkspaceResourceByID(r.Context(), workspaceAgent.ResourceID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace resource.",
Detail: err.Error(),
})
return
}
job, err := api.Database.GetWorkspaceBuildByJobID(r.Context(), resource.JobID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace build.",
Detail: err.Error(),
})
return
}
workspace, err := api.Database.GetWorkspaceByID(r.Context(), job.WorkspaceID)
if err != nil {
httpapi.Write(r.Context(), rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching workspace.",
Detail: err.Error(),
})
return
}