B #3080: Packet provision of CentOS 7 on c2.medium fails (#3186)

share/oneprovision/ansible/roles/ddc/tasks/clean_netconfigs.yml

@@ -5,6 +5,7 @@
   shell: |
     ip link >/dev/null || exit 1
 
+    CHANGED=''
     for FILE in ifcfg-*; do
       # skip interfaces disabled "on boot"
       if grep -q -i '^ONBOOT=["'\'']no'; then
@@ -17,9 +18,21 @@
 
       # if interface does not exist, disable configuration
       if ! ip link show ${IFACE} >/dev/null 2>&1; then
+        CHANGED=yes
         mv ${FILE} disabled-${FILE}
       fi
     done
+
+    # As a result of obsolete configuration, the network service
+    # could end up in the failed state. Restart of the networking
+    # might fail later, because only service start is triggered
+    # (without prior stop). We try to manually put the interfaces down,
+    # and restart the networking to fix the service state.
+    # https://github.com/OpenNebula/one/issues/3080
+    if [ -n "${CHANGED}" ] && systemctl is-failed network.service >/dev/null 2>&1; then
+      ifdown ifcfg-* || :
+      systemctl restart network.service
+    fi
   args:
     executable: /bin/bash
     chdir: /etc/sysconfig/network-scripts