Review of platform detection (#56)

* Leave default image platform empty for static provider (see FAQ doc) * Handle platform variant * Add database migration process * Switch to Open Container Specification labels as label-schema.org ones are deprecated * Remove unneeded `diun.os` and `diun.arch` docker labels Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>
2025-12-21 21:33:22 +01:00 · 2020-03-31 23:27:10 +02:00
parent 2893414f59
commit 9c797f1616
28 changed files with 661 additions and 221 deletions
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -64,6 +64,18 @@ jobs:
        with:
          version: latest
          args: release --skip-publish --rm-dist
+      -
+        name: Test
+        run: |
+          go test -coverprofile=coverage.txt -covermode=atomic ./...
+      -
+        # https://github.com/codecov/codecov-action
+        name: Upload coverage
+        uses: codecov/codecov-action@v1
+        if: success()
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.txt
      -
        # https://github.com/softprops/action-gh-release
        name: GitHub Release
@@ -86,15 +98,26 @@ jobs:
        name: Prepare
        id: prepare
        run: |
+          DOCKER_USERNAME=crazymax
+          DOCKER_IMAGE=crazymax/${{ github.event.repository.name }}
+          DOCKER_PLATFORMS=linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/386,linux/ppc64le,linux/s390x
+          VERSION=snapshot
          if [[ $GITHUB_REF == refs/tags/* ]]; then
-            echo ::set-output name=version::${GITHUB_REF#refs/tags/v}
-          else
-            echo ::set-output name=version::snapshot
+            VERSION=${GITHUB_REF#refs/tags/v}
          fi
-          echo ::set-output name=build_date::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
-          echo ::set-output name=docker_platforms::linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/386,linux/ppc64le,linux/s390x
-          echo ::set-output name=docker_username::crazymax
-          echo ::set-output name=docker_image::crazymax/${{ github.event.repository.name }}
+          TAGS="--tag ${DOCKER_IMAGE}:${VERSION}"
+          if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
+            TAGS="$TAGS --tag ${DOCKER_IMAGE}:latest"
+          fi
+          echo ::set-output name=docker_username::${DOCKER_USERNAME}
+          echo ::set-output name=docker_image::${DOCKER_IMAGE}
+          echo ::set-output name=version::${VERSION}
+          echo ::set-output name=buildx_args::--platform ${DOCKER_PLATFORMS} \
+            --build-arg VERSION=${VERSION} \
+            --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
+            --build-arg VCS_REF=${GITHUB_SHA::8} \
+            ${TAGS} \
+            --file Dockerfile .
      -
        # https://github.com/crazy-max/ghaction-docker-buildx
        name: Set up Docker Buildx
@@ -106,17 +129,9 @@ jobs:
        name: Checkout
        uses: actions/checkout@v1
      -
-        name: Docker Buildx (no push)
+        name: Docker Buildx (build)
        run: |
-          docker buildx build --platform ${{ steps.prepare.outputs.docker_platforms }} \
-            --output "type=image,push=false" \
-            --build-arg "VERSION=${{ steps.prepare.outputs.version }}" \
-            --build-arg "BUILD_DATE=${{ steps.prepare.outputs.build_date }}" \
-            --build-arg "VCS_REF=${GITHUB_SHA::8}" \
-            --build-arg "VERSION=${{ steps.prepare.outputs.version }}" \
-            --tag "${{ steps.prepare.outputs.docker_image }}:latest" \
-            --tag "${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}" \
-            --file Dockerfile .
+          docker buildx build --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}
      -
        name: Docker Login
        if: success() && startsWith(github.ref, 'refs/tags/v')
@@ -128,15 +143,7 @@ jobs:
        name: Docker Buildx (push)
        if: success() && startsWith(github.ref, 'refs/tags/v')
        run: |
-          docker buildx build --platform ${{ steps.prepare.outputs.docker_platforms }} \
-            --output "type=image,push=true" \
-            --build-arg "VERSION=${{ steps.prepare.outputs.version }}" \
-            --build-arg "BUILD_DATE=${{ steps.prepare.outputs.build_date }}" \
-            --build-arg "VCS_REF=${GITHUB_SHA::8}" \
-            --build-arg "VERSION=${{ steps.prepare.outputs.version }}" \
-            --tag "${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}" \
-            --tag "${{ steps.prepare.outputs.docker_image }}:latest" \
-            --file Dockerfile .
+          docker buildx build --output "type=image,push=true" ${{ steps.prepare.outputs.buildx_args }}
      -
        name: Docker Check Manifest
        if: always() && startsWith(github.ref, 'refs/tags/v')
--- a/18
+++ b/18
@@ -46,15 +46,15 @@ ARG VCS_REF
 ARG VERSION

 LABEL maintainer="CrazyMax" \
-  org.label-schema.build-date=$BUILD_DATE \
-  org.label-schema.name="Diun" \
-  org.label-schema.description="Docker image update notifier" \
-  org.label-schema.version=$VERSION \
-  org.label-schema.url="https://github.com/crazy-max/diun" \
-  org.label-schema.vcs-ref=$VCS_REF \
-  org.label-schema.vcs-url="https://github.com/crazy-max/diun" \
-  org.label-schema.vendor="CrazyMax" \
-  org.label-schema.schema-version="1.0"
+  org.opencontainers.image.created=$BUILD_DATE \
+  org.opencontainers.image.url="https://github.com/crazy-max/diun" \
+  org.opencontainers.image.source="https://github.com/crazy-max/diun" \
+  org.opencontainers.image.version=$VERSION \
+  org.opencontainers.image.revision=$VCS_REF \
+  org.opencontainers.image.vendor="CrazyMax" \
+  org.opencontainers.image.title="Diun" \
+  org.opencontainers.image.description="Docker image update notifier" \
+  org.opencontainers.image.licenses="MIT"

 RUN apk --update --no-cache add \
    ca-certificates \
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@
  * [Swarm](doc/providers/swarm.md)
  * [Static](doc/providers/static.md)
 * [Notifications](doc/notifications.md)
+* [FAQ](doc/faq.md)

 ## How can I help ?

--- a/doc/configuration.md
+++ b/doc/configuration.md
@@ -109,11 +109,13 @@ providers:
      include_tags:
        - ^(0|[1-9]\d*)\..*
    # Watch alpine image (library) and assume docker.io registry and latest tag.
-    # Only check linux/arm64v8 image
+    # Force linux/arm64/v8 platform for this image
    - name: alpine
      watch_repo: true
+      platform:
        os: linux
-      arch: arm64v8
+        arch: arm64
+        variant: v8
 ```

 ## Reference
@@ -124,9 +126,9 @@ providers:

 ### watch

-* `workers`: Maximum number of workers that will execute tasks concurrently. _Optional_. (default: `10`).
-* `schedule`: [CRON expression](https://godoc.org/github.com/robfig/cron#hdr-CRON_Expression_Format) to schedule Diun watcher. _Optional_. (default: `0 * * * *`).
-* `first_check_notif`: Send notification at the very first analysis of an image. _Optional_. (default: `false`).
+* `workers`: Maximum number of workers that will execute tasks concurrently (default: `10`).
+* `schedule`: [CRON expression](https://godoc.org/github.com/robfig/cron#hdr-CRON_Expression_Format) to schedule Diun watcher (default: `0 * * * *`).
+* `first_check_notif`: Send notification at the very first analysis of an image. (default: `false`).

 ### notif

@@ -187,27 +189,29 @@ providers:

 * `docker`: Map of Docker standalone engines to watch
  * `<key>`: An unique identifier for this provider.
-    * `endpoint`: Server address to connect to. Local if empty. _Optional_
-    * `api_version`: Overrides the client version with the specified one. _Optional_
-    * `tls_certs_path`: Path to load the TLS certificates from. _Optional_
+    * `endpoint`: Server address to connect to. Local if empty.
+    * `api_version`: Overrides the client version with the specified one.
+    * `tls_certs_path`: Path to load the TLS certificates from.
    * `tls_verify`: Controls whether client verifies the server's certificate chain and hostname (default: `true`).
    * `watch_by_default`: Enable watch by default. If false, containers that don't have `diun.enable=true` label will be ignored (default: `false`).
    * `watch_stopped`: Include created and exited containers too (default: `false`).

 * `swarm`: Map of Docker Swarm to watch
  * `<key>`: An unique identifier for this provider.
-    * `endpoint`: Server address to connect to. Local if empty. _Optional_
-    * `api_version`: Overrides the client version with the specified one. _Optional_
-    * `tls_certs_path`: Path to load the TLS certificates from. _Optional_
+    * `endpoint`: Server address to connect to. Local if empty.
+    * `api_version`: Overrides the client version with the specified one.
+    * `tls_certs_path`: Path to load the TLS certificates from.
    * `tls_verify`: Controls whether client verifies the server's certificate chain and hostname (default: `true`).
    * `watch_by_default`: Enable watch by default. If false, services that don't have `diun.enable=true` label will be ignored (default: `false`).

 * `static`: Slice of static image to watch
  * `name`: Docker image name to watch using `registry/path:tag` format. If registry is omitted, `docker.io` will be used and if tag is omitted, `latest` will be used. **required**
-  * `os`: OS to use. _Optional_. (default: `linux`).
-  * `arch`: Architecture to use. _Optional_. (default: `amd64`).
  * `regopts_id`: Registry options ID from `regopts` to use.
  * `watch_repo`: Watch all tags of this `image` repository (default: `false`).
  * `max_tags`: Maximum number of tags to watch if `watch_repo` enabled. 0 means all of them (default: `0`).
  * `include_tags`: List of regular expressions to include tags. Can be useful if you enable `watch_repo`.
  * `exclude_tags`: List of regular expressions to exclude tags. Can be useful if you enable `watch_repo`.
+  * `platform`: Check a custom platform. (default is retrieved dynamically based on your operating system).
+    * `os`: Operating system to use.
+    * `arch`: CPU architecture to use.
+    * `variant`: Variant of the CPU to use.
--- a/doc/faq.md
+++ b/doc/faq.md
@@ -0,0 +1,55 @@
+# FAQ
+
+* [No image found in manifest list for architecture [], variant [], OS []](#no-image-found-in-manifest-list-for-architecture--variant--os-)
+
+## No image found in manifest list for architecture [], variant [], OS []
+
+If you encounter this kind of error, you are probably using the [static provider](providers/static.md) containing an image with an erroneous or empty platform. If the platform is not filled in, it will be deduced automatically from the information of your operating system on which Diun is running.
+
+In the example below, Diun is running (`diun_x.x.x_windows_i386.zip`) on Windows 10 and tries to analyze the `crazymax/cloudflared` image with the detected platform (`windows/386)`:
+
+```yml
+db:
+  path: diun.db
+
+watch:
+  workers: 20
+  schedule: "* * * * *"
+  first_check_notif: true
+
+providers:
+  static:
+    - name: crazymax/cloudflared:2020.2.1
+      watch_repo: true
+```
+
+But this platform is not supported by this image as you can see [on DockerHub](https://hub.docker.com/layers/crazymax/cloudflared/2020.2.1/images/sha256-137eea4e84ec4c6cb5ceb2017b9788dcd7b04f135d756e1f37e3e6673c0dd9d2?context=explore):
+
+```
+Fri, 27 Mar 2020 01:20:03 UTC ERR Cannot run job error="Error choosing image instance: no image found in manifest list for architecture 386, variant , OS windows" provider=static-0
+Fri, 27 Mar 2020 01:20:03 UTC ERR Cannot list tags from registry error="Error choosing image instance: no image found in manifest list for architecture 386, variant , OS windows" image=crazymax/cloudflared:2020.2.1 provider=static-0
+```
+
+You have to force the platform for this image if you are not on a supported platform. For example:
+
+```yml
+db:
+  path: diun.db
+
+watch:
+  workers: 20
+  schedule: "* * * * *"
+  first_check_notif: true
+
+providers:
+  static:
+    - name: crazymax/cloudflared:2020.2.1
+      watch_repo: true
+      platform:
+        os: linux
+        arch: amd64
+```
+
+```
+Fri, 27 Mar 2020 01:24:33 UTC INF New image found image=docker.io/crazymax/cloudflared:2020.2.1 provider=static-0
+```
--- a/doc/providers/docker.md
+++ b/doc/providers/docker.md
@@ -93,8 +93,6 @@ diun_1         | Sat, 14 Dec 2019 15:30:13 CET INF Next run in 29 minutes (2019-
 In the same spirit as the [static provider](static.md), you can configure more finely the way to analyze the image of your container. But unlike the static provider, this is done via Docker labels:

 * `diun.enable`: Set to true to enable image analysis of this container. Required if `watch_by_default` is disabled for this provider.
-* `diun.os`: OS to use. _Optional_. (default: `linux`).
-* `diun.arch`: Architecture to use. _Optional_. (default: `amd64`).
 * `diun.regopts_id`: Registry options ID from [`regopts`](../configuration.md#regopts) to use.
 * `diun.watch_repo`: Watch all tags of this container image (default: `false`).
 * `diun.max_tags`: Maximum number of tags to watch if `diun.watch_repo` enabled. 0 means all of them (default: `0`).
--- a/doc/providers/swarm.md
+++ b/doc/providers/swarm.md
@@ -105,4 +105,11 @@ diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF N

 ## Configuration

-You can configure more finely the way to analyze the image of your service as for the [Docker provider](docker.md) with [Docker labels](docker.md#configuration).
+In the same spirit as the [static provider](static.md), you can configure more finely the way to analyze the image of your service. But unlike the static provider, this is done via Docker labels:
+
+* `diun.enable`: Set to true to enable image analysis of this container. Required if `watch_by_default` is disabled for this provider.
+* `diun.regopts_id`: Registry options ID from [`regopts`](../configuration.md#regopts) to use.
+* `diun.watch_repo`: Watch all tags of this container image (default: `false`).
+* `diun.max_tags`: Maximum number of tags to watch if `diun.watch_repo` enabled. 0 means all of them (default: `0`).
+* `diun.include_tags`: Semi-colon separated list of regular expressions to include tags. Can be useful if you enable `diun.watch_repo`.
+* `diun.exclude_tags`: Semi-colon separated list of regular expressions to exclude tags. Can be useful if you enable `diun.watch_repo`.
--- a/doc/usage.md
+++ b/doc/usage.md
@@ -4,10 +4,10 @@

 `diun --config=CONFIG [<flags>]`

-* `--help` : Show help text and exit. _Optional_.
-* `--version` : Show version and exit. _Optional_.
+* `--help` : Show help text and exit.
+* `--version` : Show version and exit.
 * `--config <path>` : Diun YAML configuration file. **Required**. (example: `diun.yml`).
-* `--timezone <timezone>` : Timezone assigned to Diun. _Optional_. (default: `UTC`).
-* `--log-level <level>` : Log level output. _Optional_. (default: `info`).
-* `--log-json` : Enable JSON logging output. _Optional_. (default: `false`).
-* `--log-caller` : Enable to add file:line of the caller. _Optional_. (default: `false`).
+* `--timezone <timezone>` : Timezone assigned to Diun. (default: `UTC`).
+* `--log-level <level>` : Log level output. (default: `info`).
+* `--log-json` : Enable JSON logging output. (default: `false`).
+* `--log-caller` : Enable to add file:line of the caller. (default: `false`).
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,8 @@ module github.com/crazy-max/diun
 go 1.13

 require (
-	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
 	github.com/alecthomas/kingpin v0.0.0-20190816080609-dce89ec0b9f1
-	github.com/containers/image/v5 v5.2.1
+	github.com/containers/image/v5 v5.4.0
 	github.com/docker/docker v1.13.1
 	github.com/docker/go-connections v0.4.0
 	github.com/go-gomail/gomail v0.0.0-20160411212932-81ebce5c23df
@@ -13,7 +12,6 @@ require (
 	github.com/hako/durafmt v0.0.0-20190612201238-650ed9f29a84
 	github.com/imdario/mergo v0.3.9
 	github.com/matcornic/hermes/v2 v2.1.0
-	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/nlopes/slack v0.6.0
 	github.com/opencontainers/go-digest v1.0.0-rc1
 	github.com/panjf2000/ants/v2 v2.3.1
@@ -24,7 +22,6 @@ require (
 	github.com/stretchr/testify v1.5.1
 	github.com/technoweenie/multipartstreamer v1.0.1 // indirect
 	go.etcd.io/bbolt v1.3.4
-	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
 	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df // indirect
 	gopkg.in/yaml.v2 v2.2.8
--- a/go.sum
+++ b/go.sum
@@ -1,10 +1,18 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
 github.com/14rcole/gopopulate v0.0.0-20180821133914-b175b219e774/go.mod h1:6/0dYRLLXyJjbkIPeeGyoJ/eKOSI0eU6eTlCBYibgd0=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
+github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
+github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
+github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
+github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
+github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
+github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/DataDog/zstd v1.4.0/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/sprig v2.16.0+incompatible h1:QZbMUPxRQ50EKAq3LFMnxddMu88/EUUG3qmxwtDmPsY=
@@ -13,8 +21,11 @@ github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5 h1:ygIc8M6tr
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
 github.com/Microsoft/hcsshim v0.8.7 h1:ptnOoufxGSzauVTsdE+wMYnCWA301PdoN4xg5oRdZpg=
 github.com/Microsoft/hcsshim v0.8.7/go.mod h1:OHd7sQqRFrYd3RmSgbgji+ctCwkbq2wbEYNSzOYtcBQ=
+github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
 github.com/PuerkitoBio/goquery v1.5.0 h1:uGvmFXOA73IKluu/F84Xd1tt/z07GYm8X49XKHP7EJk=
 github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
+github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
+github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
 github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d/go.mod h1:asat636LX7Bqt5lYEZ27JNDcqxfjdBQuJ/MM4CN/Lzo=
 github.com/alecthomas/kingpin v0.0.0-20190816080609-dce89ec0b9f1 h1:mMQ7zXsR8Z+qu7xwkCkjv80btn4DMOnek8rX+STVDdo=
@@ -27,6 +38,10 @@ github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRy
 github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
 github.com/aokoli/goutils v1.0.1 h1:7fpzNGoJ3VA8qcrm++XEE1QUe0mIwNeLa02Nwq7RDkg=
 github.com/aokoli/goutils v1.0.1/go.mod h1:SijmP0QR8LtwsmDs8Yii5Z/S4trXFGFC2oO5g9DP+DQ=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
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+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
 gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AWRXxgwEyPp2z+p0+hgMuE=
 gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
+gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -291,6 +415,19 @@ gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-k8s.io/client-go v0.0.0-20170217214107-bcde30fb7eae/go.mod h1:7vJpHMYJwNQCWgzmNV+VYUl1zCObLyodBc8nIyt8L5s=
+k8s.io/api v0.18.0/go.mod h1:q2HRQkfDzHMBZL9l/y9rH63PkQl4vae0xRT+8prbrK8=
+k8s.io/apimachinery v0.18.0/go.mod h1:9SnR/e11v5IbyPCGbvJViimtJ0SwHG4nfZFjU77ftcA=
+k8s.io/client-go v0.18.0/go.mod h1:uQSYDYs4WhVZ9i6AIoEZuwUggLVEF64HOD37boKAtF8=
+k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
+k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
+k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
+k8s.io/kube-openapi v0.0.0-20200121204235-bf4fb3bd569c/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
 k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
+k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
+sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
--- a/internal/app/diun.go
+++ b/internal/app/diun.go
@@ -66,6 +66,12 @@ func New(cfg *config.Config, location *time.Location) (*Diun, error) {
 func (di *Diun) Start() error {
 	var err error

+	// Migrate db
+	err = di.db.Migrate()
+	if err != nil {
+		return err
+	}
+
 	// Run on startup
 	di.Run()

--- a/internal/app/job.go
+++ b/internal/app/job.go
@@ -51,8 +51,7 @@ func (di *Diun) createJob(job model.Job) {

 	// Set defaults
 	if err := mergo.Merge(&job.Image, model.Image{
-		Os:        "linux",
-		Arch:      "amd64",
+		Platform:  model.ImagePlatform{},
 		WatchRepo: false,
 		MaxTags:   0,
 	}); err != nil {
@@ -75,13 +74,14 @@ func (di *Diun) createJob(job model.Job) {
 	}

 	job.Registry, err = registry.New(registry.Options{
-		Os:          job.Image.Os,
-		Arch:        job.Image.Arch,
 		Username:     regUser,
 		Password:     regPassword,
 		Timeout:      time.Duration(regOpts.Timeout) * time.Second,
 		InsecureTLS:  regOpts.InsecureTLS,
 		UserAgent:    di.userAgent,
+		ImageOs:      job.Image.Platform.Os,
+		ImageArch:    job.Image.Platform.Arch,
+		ImageVariant: job.Image.Platform.Variant,
 	})
 	if err != nil {
 		sublog.Error().Err(err).Msg("Cannot create registry client")
--- a/internal/config/config.test.yml
+++ b/internal/config/config.test.yml
@@ -89,8 +89,10 @@ providers:
    - name: traefik
      watch_repo: true
    - name: alpine
+      platform:
        os: linux
-      arch: arm64v8
+        arch: arm64
+        variant: v8
    - name: docker.io/graylog/graylog:3.2.0
    - name: jacobalberty/unifi:5.9
    - name: quay.io/coreos/hyperkube:v1.1.7-coreos.1
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -159,8 +159,11 @@ func TestLoad(t *testing.T) {
 						},
 						{
 							Name: "alpine",
+							Platform: model.ImagePlatform{
 								Os:      "linux",
-							Arch: "arm64v8",
+								Arch:    "arm64",
+								Variant: "v8",
+							},
 						},
 						{
 							Name: "docker.io/graylog/graylog:3.2.0",
--- a/internal/db/client.go
+++ b/internal/db/client.go
@@ -1,13 +1,11 @@
 package db

 import (
-	"bytes"
-	"encoding/json"
 	"fmt"
+	"reflect"
 	"time"

 	"github.com/crazy-max/diun/internal/model"
-	"github.com/crazy-max/diun/pkg/registry"
 	"github.com/rs/zerolog/log"
 	bolt "go.etcd.io/bbolt"
 )
@@ -16,9 +14,14 @@ import (
 type Client struct {
 	*bolt.DB
 	cfg      model.Db
+	metadata Metadata
 }

-const bucket = "manifest"
+const (
+	dbVersion      = 2
+	bucketMetadata = "metadata"
+	bucketManifest = "manifest"
+)

 // New creates new db instance
 func New(cfg model.Db) (*Client, error) {
@@ -30,69 +33,48 @@ func New(cfg model.Db) (*Client, error) {
 	}

 	if err = db.Update(func(tx *bolt.Tx) error {
-		_, err := tx.CreateBucketIfNotExists([]byte(bucket))
+		_, err := tx.CreateBucketIfNotExists([]byte(bucketMetadata))
+		return err
+	}); err != nil {
+		return nil, err
+	}
+
+	if err = db.Update(func(tx *bolt.Tx) error {
+		_, err := tx.CreateBucketIfNotExists([]byte(bucketManifest))
 		return err
 	}); err != nil {
 		return nil, err
 	}

 	if err = db.View(func(tx *bolt.Tx) error {
-		b := tx.Bucket([]byte(bucket))
+		b := tx.Bucket([]byte(bucketManifest))
 		stats := b.Stats()
-		log.Debug().Msgf("%d entries found in database", stats.KeyN)
+		log.Debug().Msgf("%d entries found in manifest bucket", stats.KeyN)
 		return nil
 	}); err != nil {
-		return nil, fmt.Errorf("cannot count entries in database, %v", err)
+		return nil, fmt.Errorf("cannot count entries in manifest bucket, %v", err)
 	}

-	return &Client{db, cfg}, nil
+	c := &Client{
+		DB:       db,
+		cfg:      cfg,
+		metadata: Metadata{},
+	}
+
+	if err := c.ReadMetadata(); err != nil {
+		return nil, err
+	}
+	if reflect.DeepEqual(c.metadata, Metadata{}) {
+		c.metadata = Metadata{
+			Version: 1,
+		}
+	}
+
+	log.Debug().Msgf("Current database version: %d", c.metadata.Version)
+	return c, nil
 }

 // Close closes db connection
 func (c *Client) Close() error {
 	return c.DB.Close()
 }
-
-// First checks if a Docker image has ever been analyzed
-func (c *Client) First(image registry.Image) (bool, error) {
-	found := false
-
-	err := c.View(func(tx *bolt.Tx) error {
-		c := tx.Bucket([]byte(bucket)).Cursor()
-		name := []byte(image.Name())
-		for k, _ := c.Seek(name); k != nil && bytes.HasPrefix(k, name); k, _ = c.Next() {
-			found = true
-			return nil
-		}
-		return nil
-	})
-
-	return !found, err
-}
-
-// GetManifest returns Docker image manifest
-func (c *Client) GetManifest(image registry.Image) (registry.Manifest, error) {
-	var manifest registry.Manifest
-
-	err := c.View(func(tx *bolt.Tx) error {
-		b := tx.Bucket([]byte(bucket))
-		if entryBytes := b.Get([]byte(image.String())); entryBytes != nil {
-			return json.Unmarshal(entryBytes, &manifest)
-		}
-		return nil
-	})
-
-	return manifest, err
-}
-
-// PutManifest add Docker image manifest in db
-func (c *Client) PutManifest(image registry.Image, manifest registry.Manifest) error {
-	entryBytes, _ := json.Marshal(manifest)
-
-	err := c.Update(func(tx *bolt.Tx) error {
-		b := tx.Bucket([]byte(bucket))
-		return b.Put([]byte(image.String()), entryBytes)
-	})
-
-	return err
-}
--- a/internal/db/manifest.go
+++ b/internal/db/manifest.go
@@ -0,0 +1,53 @@
+package db
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/crazy-max/diun/pkg/registry"
+	bolt "go.etcd.io/bbolt"
+)
+
+// First checks if a Docker image has ever been analyzed
+func (c *Client) First(image registry.Image) (bool, error) {
+	found := false
+
+	err := c.View(func(tx *bolt.Tx) error {
+		c := tx.Bucket([]byte(bucketManifest)).Cursor()
+		name := []byte(image.Name())
+		for k, _ := c.Seek(name); k != nil && bytes.HasPrefix(k, name); k, _ = c.Next() {
+			found = true
+			return nil
+		}
+		return nil
+	})
+
+	return !found, err
+}
+
+// GetManifest returns Docker image manifest
+func (c *Client) GetManifest(image registry.Image) (registry.Manifest, error) {
+	var manifest registry.Manifest
+
+	err := c.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(bucketManifest))
+		if entryBytes := b.Get([]byte(image.String())); entryBytes != nil {
+			return json.Unmarshal(entryBytes, &manifest)
+		}
+		return nil
+	})
+
+	return manifest, err
+}
+
+// PutManifest add Docker image manifest in db
+func (c *Client) PutManifest(image registry.Image, manifest registry.Manifest) error {
+	entryBytes, _ := json.Marshal(manifest)
+
+	err := c.Update(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(bucketManifest))
+		return b.Put([]byte(image.String()), entryBytes)
+	})
+
+	return err
+}
--- a/internal/db/metadata.go
+++ b/internal/db/metadata.go
@@ -0,0 +1,39 @@
+package db
+
+import (
+	"encoding/json"
+
+	bolt "go.etcd.io/bbolt"
+)
+
+// Metadata represents db metadata informations
+type Metadata struct {
+	Version int
+}
+
+const (
+	metadataKey = "ID"
+)
+
+// ReadMetadata returns db metadata
+func (c *Client) ReadMetadata() error {
+	return c.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(bucketMetadata))
+		if entryBytes := b.Get([]byte(metadataKey)); entryBytes != nil {
+			return json.Unmarshal(entryBytes, &c.metadata)
+		}
+		return nil
+	})
+}
+
+// WriteMetadata writes db metadata
+func (c *Client) WriteMetadata(metadata Metadata) error {
+	entryBytes, _ := json.Marshal(metadata)
+
+	err := c.Update(func(tx *bolt.Tx) error {
+		b := tx.Bucket([]byte(bucketMetadata))
+		return b.Put([]byte(metadataKey), entryBytes)
+	})
+
+	return err
+}
--- a/internal/db/migrate.go
+++ b/internal/db/migrate.go
@@ -0,0 +1,78 @@
+package db
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/opencontainers/go-digest"
+	"github.com/pkg/errors"
+	"github.com/rs/zerolog/log"
+)
+
+// Migrate runs database migration
+func (c *Client) Migrate() error {
+	if c.metadata.Version == dbVersion {
+		return nil
+	}
+
+	migrations := map[int]func(*Client) error{
+		2: (*Client).migration2,
+	}
+
+	for version := c.metadata.Version + 1; version <= dbVersion; version++ {
+		migration, found := migrations[version]
+		if !found {
+			return fmt.Errorf("database migration v%d not found", version)
+		}
+
+		log.Info().Msgf("Database migration v%d...", version)
+		if err := migration(c); err != nil {
+			return errors.Wrap(err, fmt.Sprintf("Database migration v%d failed", version))
+		}
+	}
+
+	return c.WriteMetadata(Metadata{
+		Version: dbVersion,
+	})
+}
+
+func (c *Client) migration2() error {
+	type oldManifest struct {
+		Name          string
+		Tag           string
+		MIMEType      string
+		Digest        digest.Digest
+		Created       *time.Time
+		DockerVersion string
+		Labels        map[string]string
+		Architecture  string `json:"-"`
+		Os            string `json:"-"`
+		Layers        []string
+	}
+
+	tx, err := c.Begin(true)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	bucket := tx.Bucket([]byte(bucketManifest))
+	curs := bucket.Cursor()
+	for k, v := curs.First(); k != nil; k, v = curs.Next() {
+		var oldManifest oldManifest
+		if err := json.Unmarshal(v, &oldManifest); err != nil {
+			return err
+		}
+		entryBytes, _ := json.Marshal(oldManifest)
+		if err := bucket.Put(k, entryBytes); err != nil {
+			return err
+		}
+	}
+
+	if err := tx.Commit(); err != nil {
+		return err
+	}
+
+	return nil
+}
--- a/internal/model/image.go
+++ b/internal/model/image.go
@@ -3,8 +3,7 @@ package model
 // Image holds image configuration
 type Image struct {
 	Name        string        `yaml:"name,omitempty" json:",omitempty"`
-	Os          string   `yaml:"os,omitempty" json:",omitempty"`
-	Arch        string   `yaml:"arch,omitempty" json:",omitempty"`
+	Platform    ImagePlatform `yaml:"platform,omitempty" json:",omitempty"`
 	RegOptsID   string        `yaml:"regopts_id,omitempty" json:",omitempty"`
 	WatchRepo   bool          `yaml:"watch_repo,omitempty" json:",omitempty"`
 	MaxTags     int           `yaml:"max_tags,omitempty" json:",omitempty"`
@@ -12,6 +11,13 @@ type Image struct {
 	ExcludeTags []string      `yaml:"exclude_tags,omitempty" json:",omitempty"`
 }

+// ImagePlatform holds image platform configuration
+type ImagePlatform struct {
+	Os      string `yaml:"os,omitempty" json:",omitempty"`
+	Arch    string `yaml:"arch,omitempty" json:",omitempty"`
+	Variant string `yaml:"variant,omitempty" json:",omitempty"`
+}
+
 // Image status constants
 const (
 	ImageStatusNew      = ImageStatus("new")
--- a/internal/notif/mail/client.go
+++ b/internal/notif/mail/client.go
@@ -65,7 +65,7 @@ func (c *Client) Send(entry model.NotifEntry) error {

 Docker 🐳 tag **{{ .Image.Domain }}/{{ .Image.Path }}:{{ .Image.Tag }}** which you subscribed to through **{{ .Provider }}** provider has been {{ if (eq .Status "new") }}newly added{{ else }}updated{{ end }}.

-This image has been {{ if (eq .Status "new") }}created{{ else }}updated{{ end }} at <code>{{ .Manifest.Created.Format "Jan 02, 2006 15:04:05 UTC" }}</code> with digest <code>{{ .Manifest.Digest }}</code> for <code>{{ .Manifest.Os }}/{{ .Manifest.Architecture }}</code> platform.
+This image has been {{ if (eq .Status "new") }}created{{ else }}updated{{ end }} at <code>{{ .Manifest.Created.Format "Jan 02, 2006 15:04:05 UTC" }}</code> with digest <code>{{ .Manifest.Digest }}</code> for <code>{{ .Manifest.Platform }}</code> platform.

 Need help, or have questions? Go to https://github.com/crazy-max/diun and leave an issue.

--- a/internal/notif/rocketchat/client.go
+++ b/internal/notif/rocketchat/client.go
@@ -84,7 +84,7 @@ func (c *Client) Send(entry model.NotifEntry) error {
 					},
 					{
 						Title: "Platform",
-						Value: fmt.Sprintf("%s/%s", entry.Manifest.Os, entry.Manifest.Architecture),
+						Value: entry.Manifest.Platform,
 						Short: false,
 					},
 				},
--- a/internal/notif/slack/slack.go
+++ b/internal/notif/slack/slack.go
@@ -76,7 +76,7 @@ func (c *Client) Send(entry model.NotifEntry) error {
 					},
 					{
 						Title: "Platform",
-						Value: fmt.Sprintf("%s/%s", entry.Manifest.Os, entry.Manifest.Architecture),
+						Value: entry.Manifest.Platform,
 						Short: false,
 					},
 				},
--- a/internal/notif/webhook/client.go
+++ b/internal/notif/webhook/client.go
@@ -49,8 +49,7 @@ func (c *Client) Send(entry model.NotifEntry) error {
 		MIMEType string        `json:"mime_type"`
 		Digest   digest.Digest `json:"digest"`
 		Created  *time.Time    `json:"created"`
-		Architecture string        `json:"architecture"`
-		Os           string        `json:"os"`
+		Platform string        `json:"platform"`
 	}{
 		Version:  c.app.Version,
 		Status:   string(entry.Status),
@@ -59,8 +58,7 @@ func (c *Client) Send(entry model.NotifEntry) error {
 		MIMEType: entry.Manifest.MIMEType,
 		Digest:   entry.Manifest.Digest,
 		Created:  entry.Manifest.Created,
-		Architecture: entry.Manifest.Architecture,
-		Os:           entry.Manifest.Os,
+		Platform: entry.Manifest.Platform,
 	})
 	if err != nil {
 		return err
--- a/internal/provider/common.go
+++ b/internal/provider/common.go
@@ -31,10 +31,6 @@ func ValidateContainerImage(image string, labels map[string]string, watchByDef b

 	for key, value := range labels {
 		switch key {
-		case "diun.os":
-			img.Os = value
-		case "diun.arch":
-			img.Arch = value
 		case "diun.regopts_id":
 			img.RegOptsID = value
 		case "diun.watch_repo":
--- a/pkg/registry/manifest.go
+++ b/pkg/registry/manifest.go
@@ -1,6 +1,7 @@
 package registry

 import (
+	"fmt"
 	"time"

 	"github.com/containers/image/v5/manifest"
@@ -16,9 +17,8 @@ type Manifest struct {
 	Created       *time.Time
 	DockerVersion string
 	Labels        map[string]string
-	Architecture  string
-	Os            string
 	Layers        []string
+	Platform      string `json:"-"`
 }

 // Manifest returns the manifest for a specific image
@@ -26,18 +26,18 @@ func (c *Client) Manifest(image Image) (Manifest, error) {
 	ctx, cancel := c.timeoutContext()
 	defer cancel()

-	imgCls, err := c.newImage(ctx, image.String())
+	imgCloser, err := c.newImage(ctx, image.String())
 	if err != nil {
 		return Manifest{}, err
 	}
-	defer imgCls.Close()
+	defer imgCloser.Close()

-	rawManifest, _, err := imgCls.Manifest(ctx)
+	rawManifest, _, err := imgCloser.Manifest(ctx)
 	if err != nil {
 		return Manifest{}, err
 	}

-	imgInspect, err := imgCls.Inspect(ctx)
+	imgInspect, err := imgCloser.Inspect(ctx)
 	if err != nil {
 		return Manifest{}, err
 	}
@@ -52,16 +52,20 @@ func (c *Client) Manifest(image Image) (Manifest, error) {
 		imgTag = image.Tag
 	}

+	imgPlatform := fmt.Sprintf("%s/%s", imgInspect.Os, imgInspect.Architecture)
+	if imgInspect.Variant != "" {
+		imgPlatform = fmt.Sprintf("%s/%s", imgPlatform, imgInspect.Variant)
+	}
+
 	return Manifest{
-		Name:          imgCls.Reference().DockerReference().Name(),
+		Name:          imgCloser.Reference().DockerReference().Name(),
 		Tag:           imgTag,
 		MIMEType:      manifest.GuessMIMEType(rawManifest),
 		Digest:        imgDigest,
 		Created:       imgInspect.Created,
 		DockerVersion: imgInspect.DockerVersion,
 		Labels:        imgInspect.Labels,
-		Architecture:  imgInspect.Architecture,
-		Os:            imgInspect.Os,
 		Layers:        imgInspect.Layers,
+		Platform:      imgPlatform,
 	}, nil
 }
--- a/pkg/registry/manifest_test.go
+++ b/pkg/registry/manifest_test.go
@@ -0,0 +1,37 @@
+package registry_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+
+	"github.com/crazy-max/diun/pkg/registry"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestManifestVariant(t *testing.T) {
+	rc, err := registry.New(registry.Options{
+		ImageOs:      "linux",
+		ImageArch:    "arm",
+		ImageVariant: "v7",
+	})
+	if err != nil {
+		panic(err.Error())
+	}
+
+	img, err := registry.ParseImage("crazymax/diun:2.5.0")
+	if err != nil {
+		t.Error(err)
+	}
+
+	manifest, err := rc.Manifest(img)
+	b, _ := json.MarshalIndent(manifest, "", "  ")
+	fmt.Println(string(b))
+
+	assert.NoError(t, err)
+	assert.Equal(t, "docker.io/crazymax/diun", manifest.Name)
+	assert.Equal(t, "2.5.0", manifest.Tag)
+	assert.Equal(t, "application/vnd.docker.distribution.manifest.list.v2+json", manifest.MIMEType)
+	assert.Equal(t, "linux/arm/v7", manifest.Platform)
+	assert.Empty(t, manifest.DockerVersion)
+}
--- a/pkg/registry/registry.go
+++ b/pkg/registry/registry.go
@@ -18,13 +18,14 @@ type Client struct {

 // Options holds docker registry object options
 type Options struct {
-	Os          string
-	Arch        string
 	Username     string
 	Password     string
 	InsecureTLS  bool
 	Timeout      time.Duration
 	UserAgent    string
+	ImageOs      string
+	ImageArch    string
+	ImageVariant string
 }

 // New creates new docker registry client instance
@@ -40,12 +41,13 @@ func New(opts Options) (*Client, error) {

 	// Sys context
 	sysCtx := &types.SystemContext{
-		OSChoice:                          opts.Os,
-		ArchitectureChoice:                opts.Arch,
 		DockerAuthConfig:                  auth,
 		DockerDaemonInsecureSkipTLSVerify: opts.InsecureTLS,
 		DockerInsecureSkipTLSVerify:       types.NewOptionalBool(opts.InsecureTLS),
 		DockerRegistryUserAgent:           opts.UserAgent,
+		OSChoice:                          opts.ImageOs,
+		ArchitectureChoice:                opts.ImageArch,
+		VariantChoice:                     opts.ImageVariant,
 	}

 	return &Client{
--- a/pkg/registry/registry_test.go
+++ b/pkg/registry/registry_test.go
@@ -0,0 +1,28 @@
+package registry_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/crazy-max/diun/pkg/registry"
+	"github.com/stretchr/testify/assert"
+)
+
+var (
+	rc *registry.Client
+)
+
+func TestMain(m *testing.M) {
+	var err error
+
+	rc, err = registry.New(registry.Options{})
+	if err != nil {
+		panic(err.Error())
+	}
+
+	os.Exit(m.Run())
+}
+
+func TestNew(t *testing.T) {
+	assert.NotNil(t, rc)
+}