github: Add GitHub Actions workflow.

This is an initial version of GitHub Actions support.  It mostly
mimics our current Travis CI build matrix with slight differences.

The main issue is that we don't have ARM support here.

Minor difference that we can not install 32-bit versions of libunwind
and libunbound since those are not avaialble in repository.

Higher concurrency level allows to finish all tests less than in 20
minutes.  Which is 3 times faster than in Travis.

.travis folder renamed to .ci to highlight that it used not only for
Travis CI.  Travis CI support will be reduced to only test ARM builds
soon and will be completely removed when travis-ci.org will be turned
into read-only mode.

What happened to Travis CI:
https://mail.openvswitch.org/pipermail/ovs-dev/2020-November/377773.html

Acked-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

10 files changed, 227 insertions, 15 deletions

diff --git a/.travis/linux-build.sh b/.ci/linux-build.sh
index 16102ac94..16102ac94 100755
--- a/.travis/linux-build.sh
+++ b/.ci/linux-build.sh
diff --git a/.travis/linux-prepare.sh b/.ci/linux-prepare.sh
index 71eb347e8..fea905a83 100755
--- a/.travis/linux-prepare.sh
+++ b/.ci/linux-prepare.sh
@@ -25,10 +25,15 @@ pip3 install --user --upgrade docutils
 
 if [ "$M32" ]; then
     # Installing 32-bit libraries.
-    # 32-bit and 64-bit libunwind can not be installed at the same time.
-    # This will remove the 64-bit libunwind and install 32-bit version.
-    sudo apt-get install -y \
-        libunwind-dev:i386 libunbound-dev:i386 gcc-multilib
+    pkgs="gcc-multilib"
+    if [ -z "$GITHUB_WORKFLOW" ]; then
+        # 32-bit and 64-bit libunwind can not be installed at the same time.
+        # This will remove the 64-bit libunwind and install 32-bit version.
+        # GitHub Actions doesn't have 32-bit versions of these libs.
+        pkgs=$pkgs" libunwind-dev:i386 libunbound-dev:i386"
+    fi
+
+    sudo apt-get install -y $pkgs
 fi
 
 # IPv6 is supported by kernel but disabled in TravisCI images:
diff --git a/.travis/osx-build.sh b/.ci/osx-build.sh
index bf2c13fa3..bf2c13fa3 100755
--- a/.travis/osx-build.sh
+++ b/.ci/osx-build.sh
diff --git a/.travis/osx-prepare.sh b/.ci/osx-prepare.sh
index b6447aba1..b6447aba1 100755
--- a/.travis/osx-prepare.sh
+++ b/.ci/osx-prepare.sh
diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
new file mode 100644
index 000000000..847fd3150
--- /dev/null
+++ b/.github/workflows/build-and-test.yml
@@ -0,0 +1,203 @@
+name: Build and Test
+
+on: [push, pull_request]
+
+jobs:
+  build-linux:
+    env:
+      dependencies: |
+        automake libtool gcc bc libjemalloc1 libjemalloc-dev    \
+        libssl-dev llvm-dev libelf-dev libnuma-dev libpcap-dev  \
+        python3-openssl python3-pip python3-sphinx              \
+        selinux-policy-dev
+      deb_dependencies: |
+        linux-headers-$(uname -r) build-essential fakeroot devscripts equivs
+      AFXDP:       ${{ matrix.afxdp }}
+      CC:          ${{ matrix.compiler }}
+      DEB_PACKAGE: ${{ matrix.deb_package }}
+      DPDK:        ${{ matrix.dpdk }}
+      DPDK_SHARED: ${{ matrix.dpdk_shared }}
+      KERNEL:      ${{ matrix.kernel }}
+      KERNEL_LIST: ${{ matrix.kernel_list }}
+      LIBS:        ${{ matrix.libs }}
+      M32:         ${{ matrix.m32 }}
+      OPTS:        ${{ matrix.opts }}
+      TESTSUITE:   ${{ matrix.testsuite }}
+
+    name: linux ${{ join(matrix.*, ' ') }}
+    runs-on: ubuntu-18.04
+    timeout-minutes: 30
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - compiler:     gcc
+            opts:         --disable-ssl
+          - compiler:     clang
+            opts:         --disable-ssl
+
+          - compiler:     gcc
+            testsuite:    test
+            kernel:       3.16
+          - compiler:     clang
+            testsuite:    test
+            kernel:       3.16
+
+          - compiler:     gcc
+            testsuite:    test
+            opts:         --enable-shared
+          - compiler:     clang
+            testsuite:    test
+            opts:         --enable-shared
+
+          - compiler:     gcc
+            testsuite:    test
+            dpdk:         dpdk
+          - compiler:     clang
+            testsuite:    test
+            dpdk:         dpdk
+
+          - compiler:     gcc
+            testsuite:    test
+            libs:         -ljemalloc
+          - compiler:     clang
+            testsuite:    test
+            libs:         -ljemalloc
+
+          - compiler:     gcc
+            kernel_list:  5.8 5.5 5.4 4.19
+          - compiler:     clang
+            kernel_list:  5.8 5.5 5.4 4.19
+
+          - compiler:     gcc
+            kernel_list:  4.14 4.9 4.4 3.16
+          - compiler:     clang
+            kernel_list:  4.14 4.9 4.4 3.16
+
+          - compiler:     gcc
+            afxdp:        afxdp
+            kernel:       5.3
+          - compiler:     clang
+            afxdp:        afxdp
+            kernel:       5.3
+
+          - compiler:     gcc
+            dpdk:         dpdk
+            opts:         --enable-shared
+          - compiler:     clang
+            dpdk:         dpdk
+            opts:         --enable-shared
+
+          - compiler:     gcc
+            dpdk_shared:  dpdk-shared
+          - compiler:     clang
+            dpdk_shared:  dpdk-shared
+
+          - compiler:     gcc
+            dpdk_shared:  dpdk-shared
+            opts:         --enable-shared
+          - compiler:     clang
+            dpdk_shared:  dpdk-shared
+            opts:         --enable-shared
+
+          - compiler:     gcc
+            m32:          m32
+            opts:         --disable-ssl
+
+          - compiler:     gcc
+            deb_package:  deb
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v2
+
+    - name: create ci signature file for the dpdk cache key
+      if:   matrix.dpdk != '' || matrix.dpdk_shared != ''
+      # This will collect most of DPDK related lines, so hash will be different
+      # if something changed in a way we're building DPDK including DPDK_VER.
+      # This also allows us to use cache from any branch as long as version
+      # and a way we're building DPDK stays the same.
+      run:  |
+        grep -irE 'RTE_|DPDK|meson|ninja' -r .ci/ > dpdk-ci-signature
+        cat dpdk-ci-signature
+
+    - name: cache
+      if:   matrix.dpdk != '' || matrix.dpdk_shared != ''
+      uses: actions/cache@v2
+      env:
+        matrix_key: ${{ matrix.dpdk }}${{ matrix.dpdk_shared }}
+        ci_key:     ${{ hashFiles('dpdk-ci-signature') }}
+      with:
+        path: dpdk-dir
+        key:  ${{ env.matrix_key }}-${{ env.ci_key }}
+
+    - name: install common dependencies
+      if:   matrix.deb_package == ''
+      run:  sudo apt install -y ${{ env.dependencies }}
+    - name: install dependencies for debian packages
+      if:   matrix.deb_package != ''
+      run:  sudo apt install -y ${{ env.deb_dependencies }}
+    - name: install libunbound libunwind
+      if:   matrix.m32 == ''
+      run:  sudo apt install -y libunbound-dev libunwind-dev
+
+    - name: prepare
+      run:  ./.ci/linux-prepare.sh
+
+    - name: build
+      run:  PATH="$PATH:$HOME/bin" ./.ci/linux-build.sh
+
+    - name: upload deb packages
+      if:   matrix.deb_package != ''
+      uses: actions/upload-artifact@v2
+      with:
+        name: deb-packages
+        path: '/home/runner/work/ovs/*.deb'
+
+    - name: copy logs on failure
+      if: failure() || cancelled()
+      run: |
+        # upload-artifact@v2 throws exceptions if it tries to upload socket
+        # files and we could have some socket files in testsuite.dir.
+        # Also, upload-artifact@v2 doesn't work well enough with wildcards.
+        # So, we're just archiving everything here to avoid any issues.
+        mkdir logs
+        cp config.log ./logs/
+        cp -r ./*/_build/sub/tests/testsuite.* ./logs/ || true
+        tar -czvf logs.tgz logs/
+
+    - name: upload logs on failure
+      if: failure() || cancelled()
+      uses: actions/upload-artifact@v2
+      with:
+        name: logs-linux-${{ join(matrix.*, '-') }}
+        path: logs.tgz
+
+  build-osx:
+    env:
+      CC:    clang
+      OPTS:  --disable-ssl
+
+    name:    osx clang --disable-ssl
+    runs-on: macos-latest
+    timeout-minutes: 30
+
+    strategy:
+      fail-fast: false
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: install dependencies
+      run:  brew install automake libtool
+    - name: prepare
+      run:  ./.ci/osx-prepare.sh
+    - name: build
+      run:  PATH="$PATH:$HOME/bin" ./.ci/osx-build.sh
+    - name: upload logs on failure
+      if: failure()
+      uses: actions/upload-artifact@v2
+      with:
+        name: logs-osx-clang---disable-ssl
+        path: config.log
diff --git a/.travis.yml b/.travis.yml
index 9fd8bbe01..34ef16aa7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,7 +28,7 @@ addons:
       - libunbound-dev
       - libunwind-dev
 
-before_install: ./.travis/${TRAVIS_OS_NAME}-prepare.sh
+before_install: ./.ci/${TRAVIS_OS_NAME}-prepare.sh
 
 before_script: export PATH=$PATH:$HOME/bin
 
@@ -76,7 +76,7 @@ matrix:
             - devscripts
             - equivs
 
-script: ./.travis/${TRAVIS_OS_NAME}-build.sh $OPTS
+script: ./.ci/${TRAVIS_OS_NAME}-build.sh $OPTS
 
 notifications:
   email:
diff --git a/Documentation/internals/contributing/submitting-patches.rst b/Documentation/internals/contributing/submitting-patches.rst
index 5a314cc60..4a6780371 100644
--- a/Documentation/internals/contributing/submitting-patches.rst
+++ b/Documentation/internals/contributing/submitting-patches.rst
@@ -68,11 +68,10 @@ Testing is also important:
   feature.  A bug fix patch should preferably add a test that would
   fail if the bug recurs.
 
-If you are using GitHub, then you may utilize the travis-ci.org CI build system
-by linking your GitHub repository to it. This will run some of the above tests
-automatically when you push changes to your repository.  See the "Continuous
-Integration with Travis-CI" in :doc:`/topics/testing` for details on how to set
-it up.
+If you are using GitHub, then you may utilize the travis-ci.org and the GitHub
+Actions CI build systems.  They will run some of the above tests automatically
+when you push changes to your repository.  See the "Continuous Integration with
+Travis-CI" in :doc:`/topics/testing` for details on how to set it up.
 
 Email Subject
 -------------
diff --git a/Makefile.am b/Makefile.am
index a3fbb15e2..691a005ad 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -76,12 +76,13 @@ EXTRA_DIST = \
 	MAINTAINERS.rst \
 	README.rst \
 	NOTICE \
+	.ci/linux-build.sh \
+	.ci/linux-prepare.sh \
+	.ci/osx-build.sh \
+	.ci/osx-prepare.sh \
 	.cirrus.yml \
+	.github/workflows/build-and-test.yml \
 	.travis.yml \
-	.travis/linux-build.sh \
-	.travis/linux-prepare.sh \
-	.travis/osx-build.sh \
-	.travis/osx-prepare.sh \
 	appveyor.yml \
 	boot.sh \
 	poc/builders/Vagrantfile \
diff --git a/NEWS b/NEWS
index 185555848..7e291a180 100644
--- a/NEWS
+++ b/NEWS
@@ -25,6 +25,8 @@ Post-v2.14.0
        "secondary", respectively, for OpenFlow connection roles.
      * The term "slave" has been replaced by "member", for bonds, LACP, and
        OpenFlow bundle actions.
+   - Support for GitHub Actions based continuous integration builds has been
+     added.
 
 
 v2.14.0 - 17 Aug 2020
diff --git a/README.rst b/README.rst
index e06ddf267..319f70515 100644
--- a/README.rst
+++ b/README.rst
@@ -6,6 +6,8 @@
 Open vSwitch
 ============
 
+.. image:: https://github.com/openvswitch/ovs/workflows/Build%20and%20Test/badge.svg
+    :target: https://github.com/openvswitch/ovs/actions
 .. image:: https://travis-ci.org/openvswitch/ovs.png
     :target: https://travis-ci.org/openvswitch/ovs
 .. image:: https://ci.appveyor.com/api/projects/status/github/openvswitch/ovs?branch=master&svg=true&retina=true