github: Add continuous integration Github workflow

Add a Github Actions continuous integration workflow.  This
workflow runs the unit tests, the cgroup v1 functional tests,
and the cgroup v2 functional tests.  The code coverage results
from all of the runs are collated at coveralls.io.

Like Travis CI, Github Actions currently does not provide a
distro that natively runs cgroup v2.  (And it also doesn't
expose the kernel boot command line.)  So, like our previous
Travis CI solution, unmount the cpuset controller and enable
it in cgroup v2.

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
new file mode 100644 (file)
index 0000000..675e8cb
--- /dev/null
+++ b/.github/workflows/continuous-integration.yml
@@ -0,0 +1,118 @@
+#
+# Continuous Integration Workflow for libcgroup
+#
+# Copyright (c) 2020 Oracle and/or its affiliates.
+# Author: Tom Hromatka <tom.hromatka@oracle.com>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses>.
+#
+
+name: Continuous Integration
+on: ["push", "pull_request"]
+
+jobs:
+  unittests:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: false
+    - name: Initialize the directory
+      uses: ./.github/actions/setup-libcgroup
+    - name: Run unit tests
+      run: |
+        pushd tests/gunit
+        make check
+        popd
+    - name: Collate code coverage results
+      run: lcov -d . -c > lcov.info
+    - name: Upload code coverage results
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: ./lcov.info
+        flag-name: "Unit Tests"
+        parallel: True
+
+  functionaltestsv1:
+    name: Cgroup v1 Functional Tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Install container dependencies
+      run: sudo apt-get install lxc lxd
+    - uses: actions/checkout@v2
+      with:
+        submodules: false
+    - name: Initialize the directory
+      uses: ./.github/actions/setup-libcgroup
+    - name: Run functional tests
+      run: make check
+    - name: Collate code coverage results
+      run: lcov -d . -c > lcov.info
+    - name: Upload code coverage results
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: ./lcov.info
+        flag-name: "Cgroup v1 Functional Tests"
+        parallel: True
+
+  functionaltestsv2:
+    name: Cgroup v2 Functional Tests
+    runs-on: ubuntu-20.04
+
+    steps:
+    - name: Mount cpuset cgroup v2 controller
+      run: |
+        # unmount the cpuset v1 controller.  This should make it available
+        # in the v2 hierarchy after all references have been freed
+        sudo umount /sys/fs/cgroup/cpuset
+        # wait for the references to the cpuset controller to go away
+        sleep 30
+        cat /sys/fs/cgroup/unified/cgroup.controllers
+        sudo su -c "echo +cpuset > /sys/fs/cgroup/unified/cgroup.subtree_control"
+        cat /sys/fs/cgroup/unified/cgroup.subtree_control
+    - name: Install container dependencies
+      run: sudo apt-get install lxc lxd
+    - uses: actions/checkout@v2
+      with:
+        submodules: false
+    - name: Initialize the directory
+      uses: ./.github/actions/setup-libcgroup
+    - name: Run functional tests
+      run: make check
+    - name: Collate code coverage results
+      run: lcov -d . -c > lcov.info
+    - name: Upload code coverage results
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: ./lcov.info
+        flag-name: "Cgroup v2 Functional Tests"
+        parallel: True
+
+  finalize:
+    name: Finalize the test run
+    needs: [unittests, functionaltestsv1, functionaltestsv2]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Finalize code coverage results
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        parallel-finished: True