add test-nspawn and Jenkinsfile (#21758)

Jenkinsfile

@@ -0,0 +1,23 @@
+@Library('eo-jenkins-lib@master') import eo.Utils
+
+pipeline {
+    agent any
+    stages {
+        stage('Unit Tests') {
+            steps {
+                sh 'sudo ./test-nspawn buster'
+            }
+        }
+    }
+    post {
+        always {
+            script {
+                utils = new Utils()
+                utils.mail_notify(currentBuild, env, 'ci+jenkins-publik-devinst@entrouvert.org')
+            }
+        }
+        success {
+            cleanWs()
+        }
+    }
+}

test-nspawn

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -ex
+
+if [ $1 = 'buster' ]
+then
+    suite=$1
+    image=publik-devinst-$suite
+    fs=/var/lib/machines/$image
+    test -d $fs || (cd /var/lib/machines && debootstrap --include=systemd-container $suite $image http://deb.debian.org/debian/)
+    rsync -a --delete . $fs/opt/publik-devinst
+    sudo systemd-nspawn -x -D $fs /opt/publik-devinst/test-nspawn run-tests
+elif [ $1 = 'run-tests' ]
+then
+    apt update
+    apt install -y wget ca-certificates gnupg2 git ansible postgresql sudo python python-psycopg2 python3
+    adduser --disabled-password --gecos "" testuser
+    usermod -a -G sudo testuser
+    echo 'testuser ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+    chown -R testuser /opt/publik-devinst
+    /usr/bin/wget https://deb.entrouvert.org/entrouvert.gpg
+    apt-key add entrouvert.gpg
+    apt update
+    /etc/init.d/postgresql start
+    su testuser -l -c 'cd /opt/publik-devinst; ansible-playbook -i inventory.yml -e "{postgresql_port: 5433}" install.yml'
+fi