Configuration of Tekton Dashboard service url content path

cmd/dashboard/main.go

@@ -38,6 +38,7 @@ var (
 	streamLogs         = flag.Bool("stream-logs", true, "Enable log streaming instead of polling")
 	externalLogs       = flag.String("external-logs", "", "External logs provider URL")
 	xFrameOptions      = flag.String("x-frame-options", "DENY", "Value for the X-Frame-Options response header, set '' to omit it")
+	contentPathPrefix  = flag.String("content-path-prefix", "", "Value for content root path prefix when calling Tekton API in case Tekton is not exposed on root path")
 )
 
 func main() {
@@ -74,6 +75,7 @@ func main() {
 		StreamLogs:         *streamLogs,
 		ExternalLogsURL:    *externalLogs,
 		XFrameOptions:      *xFrameOptions,
+		ContentPathPrefix:  *contentPathPrefix,
 	}
 
 	resource := endpoints.Resource{

docs/walkthrough/walkthrough-logs.md

@@ -336,6 +336,18 @@ kubectl patch deployment tekton-dashboard -n tekton-pipelines --type='json' \
   --patch='[{"op": "add", "path": "/spec/template/spec/containers/0/args/-", "value": "--external-logs=http://logs-server.tools.svc.cluster.local:3000/logs"}]'
 ```
 
+---
+(Optional)  
+Potentially, if your Tekton Dashboard is exposed on nonroot content path e.g. http://logs.127.0.0.1.nip.io/ci/tekton patch Dashboard deployment to a add the `--content-path-prefix=/ci/tekton` option:
+
+```bash
+kubectl patch deployment tekton-dashboard -n tekton-pipelines --type='json' \
+  --patch='[{"op": "add", "path": "/spec/template/spec/containers/0/args/-", "value": "--content-path-prefix=/ci/tekton"}]'
+```
+Of course instead of the `/ci/tekton` provide your actual value    
+
+---
+
 The logs are now displayed again, fetched from the logs server configured in the previous steps.
 
 ![Logs are available again](./walkthrough-logs-logs.png)

pkg/endpoints/cluster.go

@@ -16,6 +16,7 @@ package endpoints
 import (
 	"encoding/json"
 	"net/http"
+	"strings"
 
 	"github.com/tektoncd/dashboard/pkg/logging"
 )
@@ -34,6 +35,7 @@ type Properties struct {
 	TenantNamespaces   []string `json:"tenantNamespaces,omitempty"`
 	TriggersNamespace  string   `json:"triggersNamespace,omitempty"`
 	TriggersVersion    string   `json:"triggersVersion,omitempty"`
+	ContentRootPath    string   `json:"contentRootPath,omitempty"`
 }
 
 // GetProperties is used to get the installed namespace for the Dashboard,
@@ -58,7 +60,7 @@ func (r Resource) GetProperties(response http.ResponseWriter, _ *http.Request) {
 	}
 
 	if r.Options.ExternalLogsURL != "" {
-		properties.ExternalLogsURL = "/v1/logs-proxy"
+		properties.ExternalLogsURL = strings.TrimSuffix(r.Options.ContentPathPrefix, "/") + "/v1/logs-proxy"
 	}
 
 	isTriggersInstalled := IsTriggersInstalled(r, triggersNamespace)

pkg/endpoints/externallogs.go

@@ -29,7 +29,7 @@ func (r Resource) LogsProxy(response http.ResponseWriter, request *http.Request)
 		return
 	}
 
-	uri := strings.TrimPrefix(request.URL.Path, "/v1/logs-proxy") + "?" + parsedURL.RawQuery
+	uri := strings.TrimPrefix(strings.TrimPrefix(request.URL.Path, r.Options.ContentPathPrefix), "/v1/logs-proxy") + "?" + parsedURL.RawQuery
 
 	if statusCode, err := utils.Proxy(request, response, r.Options.ExternalLogsURL+uri, http.DefaultClient); err != nil {
 		utils.RespondError(response, err, statusCode)

pkg/endpoints/types.go

@@ -30,6 +30,7 @@ type Options struct {
 	StreamLogs         bool
 	ExternalLogsURL    string
 	XFrameOptions      string
+	ContentPathPrefix  string
 }
 
 // GetPipelinesNamespace returns the PipelinesNamespace property if set