Added docker widget with documentation ✨

README.md

@@ -22,6 +22,7 @@
 * Repository overview
 * Site monitor
 * Search box
+* Docker
 
 #### Themeable
 ![multiple color schemes example](docs/images/themes-example.png)

docs/configuration.md

@@ -32,6 +32,7 @@
   - [Twitch Top Games](#twitch-top-games)
   - [iframe](#iframe)
   - [HTML](#html)
+  - [Docker](#docker)
 
 ## Intro
 Configuration is done via a single YAML file and a server restart is required in order for any changes to take effect. Trying to start the server with an invalid config file will result in an error.
@@ -1776,3 +1777,67 @@ Example:
 ```
 
 Note the use of `|` after `source:`, this allows you to insert a multi-line string.
+
+### Docker
+The Docker widget allows you to monitor your Docker containers.
+To enable this feature, ensure that your setup provides access to the **docker.sock** file.
+
+Add the following to your `docker-compose` or `docker run` command to enable the Docker widget:
+
+**Docker Example:**
+```bash
+docker run -d -p 8080:8080 \
+  -v ./glance.yml:/app/glance.yml \
+  -v /etc/timezone:/etc/timezone:ro \
+  -v /etc/localtime:/etc/localtime:ro \
+  -v /var/run/docker.sock:/var/run/docker.sock:ro \
+  glanceapp/glance
+```
+
+**Docker Compose Example:**
+```yaml
+services:
+  glance:
+    image: glanceapp/glance
+    volumes:
+      - ./glance.yml:/app/glance.yml
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    ports:
+      - 8080:8080
+    restart: unless-stopped
+```
+
+#### Configuration
+To integrate the Docker widget into your dashboard, include the following snippet in your `glance.yml` file:
+
+```yaml
+- type: docker
+  cache: 1m
+```
+
+#### Leveraging Container Labels
+You can use container labels to control visibility, URLs, icons, and titles within the Docker widget. Add the following labels to your container configuration for enhanced customization:
+
+```yaml
+labels:
+  - "glance.enable=true"       # Enable or disable visibility of the container (default: true)
+  - "glance.title=Glance"      # Optional friendly name (defaults to container name)
+  - "glance.url=https://app.example.com"  # Optional URL associated with the container
+  - "glance.iconUrl=si:docker" # Optional URL to an image which will be used as the icon for the site
+
+```
+
+**Default Values:**
+
+| Name           | Default    |
+|----------------|------------|
+| glance.enable  | true       |
+| glance.title   | Container name |
+| glance.url     | (none)     |
+| glance.iconUrl | si:docker  |
+
+Preview:
+
+![](images/docker-widget-preview.png)

go.mod

@@ -10,13 +10,31 @@ require (
 )
 
 require (
+	github.com/Microsoft/go-winio v0.4.14 // indirect
 	github.com/PuerkitoBio/goquery v1.10.0 // indirect
 	github.com/andybalholm/cascadia v1.3.2 // indirect
+	github.com/distribution/reference v0.6.0 // indirect
+	github.com/docker/docker v27.3.1+incompatible // indirect
+	github.com/docker/go-connections v0.5.0 // indirect
+	github.com/docker/go-units v0.5.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/mmcdole/goxpp v1.1.1 // indirect
+	github.com/moby/docker-image-spec v1.3.1 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.57.0 // indirect
+	go.opentelemetry.io/otel v1.32.0 // indirect
+	go.opentelemetry.io/otel/metric v1.32.0 // indirect
+	go.opentelemetry.io/otel/trace v1.32.0 // indirect
 	golang.org/x/net v0.29.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
 )

go.sum

@@ -1,3 +1,5 @@
+github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
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 github.com/andybalholm/cascadia v1.3.2 h1:3Xi6Dw5lHF15JtdcmAHD3i1+T8plmv7BQ/nsViSLyss=
@@ -5,21 +7,53 @@ github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6
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@@ -30,12 +64,29 @@ github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JT
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 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -65,9 +124,14 @@ golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
 golang.org/x/text v0.18.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/assets/static/main.css

@@ -1545,6 +1545,37 @@ details[open] .summary::after {
     background: linear-gradient(0deg, var(--color-widget-background) 10%, transparent);
 }
 
+.docker-container-icon {
+    display: block;
+    opacity: 0.8;
+    filter: grayscale(0.4);
+    object-fit: contain;
+    aspect-ratio: 1 / 1;
+    width: 3.2rem;
+    position: relative;
+    top: -0.1rem;
+    transition: filter 0.3s, opacity 0.3s;
+}
+
+.docker-container-icon.simple-icon {
+    opacity: 0.7;
+}
+
+.docker-container:hover .docker-container-icon {
+    opacity: 1;
+}
+
+.docker-container:hover .docker-container-icon:not(.simple-icon) {
+    filter: grayscale(0);
+}
+
+.docker-container-status-icon {
+    flex-shrink: 0;
+    margin-left: auto;
+    width: 2rem;
+    height: 2rem;
+}
+
 @media (max-width: 1190px) {
     .header-container {
         display: none;

internal/assets/templates.go

@@ -42,6 +42,7 @@ var (
 	DNSStatsTemplate              = compileTemplate("dns-stats.html", "widget-base.html")
 	SplitColumnTemplate           = compileTemplate("split-column.html", "widget-base.html")
 	CustomAPITemplate             = compileTemplate("custom-api.html", "widget-base.html")
+	DockerTemplate                = compileTemplate("docker.html", "widget-base.html")
 )
 
 var GlobalTemplateFunctions = template.FuncMap{

internal/assets/templates/docker.html

@@ -0,0 +1,44 @@
+{{ template "widget-base.html" . }}
+
+{{ define "widget-content" }}
+<div class="dynamic-columns list-gap-20 list-with-separator">
+    {{ range .Containers }}
+    <div class="docker-container flex items-center gap-15">
+        {{ template "container" . }}
+    </div>
+    {{ end }}
+</div>
+{{ end }}
+
+{{ define "container" }}
+{{ if .Icon.URL }}
+<img class="monitor-site-icon{{ if .Icon.IsFlatIcon }} flat-icon{{ end }}" src="{{ .Icon.URL }}" alt="" loading="lazy">
+{{ end }}
+<div class="min-width-0">
+    <a class="size-h3 color-highlight text-truncate block" href="{{ .URL }}" target="_blank" rel="noreferrer" title="{{ .Title }}">{{ .Title }}</a>
+    <div class="text-truncate" title="{{ .Image }}">{{ .Image }}</div>
+    <ul class="size-h6 color-subdue list-horizontal-text">
+        <li>{{ .StatusShort }}</li>
+        <li>{{ .StatusFull }}</li>
+    </ul>
+</div>
+{{ if eq .StatusStyle "success" }}
+<div class="docker-container-status-icon">
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="var(--color-positive)">
+        <path fill-rule="evenodd" d="M2.25 12c0-5.385 4.365-9.75 9.75-9.75s9.75 4.365 9.75 9.75-4.365 9.75-9.75 9.75S2.25 17.385 2.25 12Zm13.36-1.814a.75.75 0 1 0-1.22-.872l-3.236 4.53L9.53 12.22a.75.75 0 0 0-1.06 1.06l2.25 2.25a.75.75 0 0 0 1.14-.094l3.75-5.25Z" clip-rule="evenodd" />
+    </svg>
+</div>
+{{ else if eq .StatusStyle "warning" }}
+<div class="docker-container-status-icon">
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="var(--color-positive)">
+        <path fill-rule="evenodd" d="M9.401 3.003c1.155-2 4.043-2 5.197 0l7.355 12.748c1.154 2-.29 4.5-2.599 4.5H4.645c-2.309 0-3.752-2.5-2.598-4.5L9.4 3.003ZM12 8.25a.75.75 0 0 1 .75.75v3.75a.75.75 0 0 1-1.5 0V9a.75.75 0 0 1 .75-.75Zm0 8.25a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Z" clip-rule="evenodd" />
+    </svg>
+</div>
+{{ else }}
+<div class="docker-container-status-icon">
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="var(--color-negative)">
+        <path fill-rule="evenodd" d="M2.25 12c0-5.385 4.365-9.75 9.75-9.75s9.75 4.365 9.75 9.75-4.365 9.75-9.75 9.75S2.25 17.385 2.25 12ZM12 8.25a.75.75 0 0 1 .75.75v3.75a.75.75 0 0 1-1.5 0V9a.75.75 0 0 1 .75-.75Zm0 8.25a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Z"  clip-rule="evenodd" />
+    </svg>
+</div>
+{{ end }}
+{{ end }}

internal/feed/docker.go

@@ -0,0 +1,69 @@
+package feed
+
+import (
+	"context"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
+	"strings"
+)
+
+const (
+	dockerAPIVersion    = "1.24"
+	dockerGlanceEnable  = "glance.enable"
+	dockerGlanceTitle   = "glance.title"
+	dockerGlanceUrl     = "glance.url"
+	dockerGlanceIconUrl = "glance.iconUrl"
+)
+
+type DockerContainer struct {
+	Id      string
+	Image   string
+	Title   string
+	URL     string
+	IconURL string
+	Status  string
+	State   string
+}
+
+func FetchDockerContainers(ctx context.Context) ([]DockerContainer, error) {
+	apiClient, err := client.NewClientWithOpts(client.WithVersion(dockerAPIVersion), client.FromEnv)
+	if err != nil {
+		return nil, err
+	}
+	defer apiClient.Close()
+
+	containers, err := apiClient.ContainerList(ctx, container.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	var results []DockerContainer
+
+	for _, c := range containers {
+		isGlanceEnabled := getLabelValue(c.Labels, dockerGlanceEnable, "true")
+
+		if isGlanceEnabled != "true" {
+			continue
+		}
+
+		results = append(results, DockerContainer{
+			Id:      c.ID,
+			Image:   c.Image,
+			Title:   getLabelValue(c.Labels, dockerGlanceTitle, strings.Join(c.Names, "")),
+			URL:     getLabelValue(c.Labels, dockerGlanceUrl, ""),
+			IconURL: getLabelValue(c.Labels, dockerGlanceIconUrl, "si:docker"),
+			Status:  c.Status,
+			State:   c.State,
+		})
+	}
+
+	return results, nil
+}
+
+// getLabelValue get string value associated to a label.
+func getLabelValue(labels map[string]string, labelName, defaultValue string) string {
+	if value, ok := labels[labelName]; ok && len(value) > 0 {
+		return value
+	}
+	return defaultValue
+}

internal/widget/docker.go

@@ -0,0 +1,78 @@
+package widget
+
+import (
+	"context"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+	"html/template"
+	"time"
+
+	"github.com/glanceapp/glance/internal/assets"
+	"github.com/glanceapp/glance/internal/feed"
+)
+
+type containerData struct {
+	Id          string
+	Image       string
+	URL         string
+	Title       string
+	Icon        CustomIcon
+	StatusShort string
+	StatusFull  string
+	StatusStyle string
+}
+
+type Docker struct {
+	widgetBase `yaml:",inline"`
+	Containers []containerData `yaml:"-"`
+}
+
+func (widget *Docker) Initialize() error {
+	widget.withTitle("Docker").withCacheDuration(1 * time.Minute)
+	return nil
+}
+
+func (widget *Docker) Update(ctx context.Context) {
+	containers, err := feed.FetchDockerContainers(ctx)
+
+	if !widget.canContinueUpdateAfterHandlingErr(err) {
+		return
+	}
+
+	var items []containerData
+	for _, container := range containers {
+		var item containerData
+		item.Id = container.Id
+		item.Image = container.Image
+		item.URL = container.URL
+		item.Title = container.Title
+
+		_ = item.Icon.FromURL(container.IconURL)
+
+		switch container.State {
+		case "paused":
+		case "starting":
+		case "unhealthy":
+			item.StatusStyle = "warning"
+			break
+		case "stopped":
+		case "dead":
+		case "exited":
+			item.StatusStyle = "error"
+			break
+		default:
+			item.StatusStyle = "success"
+		}
+
+		item.StatusFull = container.Status
+		item.StatusShort = cases.Title(language.English, cases.Compact).String(container.State)
+
+		items = append(items, item)
+	}
+
+	widget.Containers = items
+}
+
+func (widget *Docker) Render() template.HTML {
+	return widget.render(widget, assets.DockerTemplate)
+}

internal/widget/fields.go

@@ -185,15 +185,10 @@ type CustomIcon struct {
 	// invert the color based on the theme being light or dark
 }
 
-func (i *CustomIcon) UnmarshalYAML(node *yaml.Node) error {
+func (i *CustomIcon) FromURL(url string) error {
-	var value string
+	prefix, icon, found := strings.Cut(url, ":")
-	if err := node.Decode(&value); err != nil {
-		return err
-	}
-
-	prefix, icon, found := strings.Cut(value, ":")
 	if !found {
-		i.URL = value
+		i.URL = url
 		return nil
 	}
 
@@ -218,8 +213,16 @@ func (i *CustomIcon) UnmarshalYAML(node *yaml.Node) error {
 
 		i.URL = "https://cdn.jsdelivr.net/gh/walkxcode/dashboard-icons@master/" + ext + "/" + basename + "." + ext
 	default:
-		i.URL = value
+		i.URL = url
 	}
 
 	return nil
 }
+
+func (i *CustomIcon) UnmarshalYAML(node *yaml.Node) error {
+	var value string
+	if err := node.Decode(&value); err != nil {
+		return err
+	}
+	return i.FromURL(value)
+}

internal/widget/widget.go

@@ -71,6 +71,8 @@ func New(widgetType string) (Widget, error) {
 		widget = &SplitColumn{}
 	case "custom-api":
 		widget = &CustomApi{}
+	case "docker":
+		widget = &Docker{}
 	default:
 		return nil, fmt.Errorf("unknown widget type: %s", widgetType)
 	}