On Mon, Dec 2, 2013 at 5:13 PM, Flavio Leitner <f...@redhat.com> wrote:
> There is a chicken and egg issue where common OVS
> configuration uses a controller which is only accessible
> via the network. So starting OVS before network.target
> would break those configurations.
>
> However, the network doesn't come up after boot because
> OVS isn't started until after the network scripts tries
> to configure the ovs.
>
> This is partially fixed by commits:
> commit: 602453000e28ec1076c0482ce13c284765a84409
> rhel: Automatically start openvswitch service before bringing an ovs
> interfa
>
> commit: 3214851c31538e8690e31f95702f8927a8c0838b
> rhel: Add OVSREQUIRES to automatically bring up OpenFlow interface
> dependencies
>
> But still there is the dependency issue between network.target
> and openvswitch which this patch fixes it. It provides two systemd
> service units. One to run at any time (openvswitch-nonetwork.service)
> which runs 'ovs-ctl start' and the other one (openvswith.service) to
> run after network.target which works as a frontend to the admin.
>
> The openvswitch-nonetwork.service is used internally by the
> 'ifup-ovs/ifdown-ovs' scripts when adding or removing ports to
> the bridge or when the openvswitch.service is enabled by the admin.
>
> Signed-off-by: Flavio Leitner <f...@redhat.com>
> ---
> rhel/automake.mk | 3 ++-
> rhel/etc_sysconfig_network-scripts_ifdown-ovs | 10 +++++++++-
> rhel/etc_sysconfig_network-scripts_ifup-ovs | 12 ++++++++++--
> rhel/openvswitch-fedora.spec.in | 3 +++
> rhel/usr_lib_systemd_system_openvswitch-nonetwork.service | 14 ++++++++++++++
> rhel/usr_lib_systemd_system_openvswitch.service | 11 +++++++----
> 6 files changed, 45 insertions(+), 8 deletions(-)
> create mode 100644 rhel/usr_lib_systemd_system_openvswitch-nonetwork.service
>
> diff --git a/rhel/automake.mk b/rhel/automake.mk
> index 2911e71..cd06823 100644
> --- a/rhel/automake.mk
> +++ b/rhel/automake.mk
> @@ -22,7 +22,8 @@ EXTRA_DIST += \
> rhel/openvswitch-fedora.spec \
> rhel/openvswitch-fedora.spec.in \
> rhel/usr_share_openvswitch_scripts_sysconfig.template \
> - rhel/usr_lib_systemd_system_openvswitch.service
> + rhel/usr_lib_systemd_system_openvswitch.service \
> + rhel/usr_lib_systemd_system_openvswitch-nonetwork.service
>
> update_rhel_spec = \
> ($(ro_shell) && sed -e 's,[@]VERSION[@],$(VERSION),g') \
> diff --git a/rhel/etc_sysconfig_network-scripts_ifdown-ovs
> b/rhel/etc_sysconfig_network-scripts_ifdown-ovs
> index 8e768c8..2a3d8d2 100755
> --- a/rhel/etc_sysconfig_network-scripts_ifdown-ovs
> +++ b/rhel/etc_sysconfig_network-scripts_ifdown-ovs
> @@ -34,7 +34,15 @@ if [ ! -x ${OTHERSCRIPT} ]; then
> OTHERSCRIPT="/etc/sysconfig/network-scripts/ifdown-eth"
> fi
>
> -[ -f /var/lock/subsys/openvswitch ] || /sbin/service openvswitch start
> +if [ -x /usr/bin/systemctl ]; then
> + if ! systemctl --quiet is-active openvswitch-nonetwork.service; then
I think this is considered non-portable.
https://www.sourceware.org/autobook/autobook/autobook_216.html
> + /usr/bin/systemctl start openvswitch-nonetwork.service
> + fi
> +else
> + if [ ! -f /var/lock/subsys/openvswitch ]; then
> + /sbin/service openvswitch start
> + fi
> +fi
>
> case "$TYPE" in
> OVSBridge)
> diff --git a/rhel/etc_sysconfig_network-scripts_ifup-ovs
> b/rhel/etc_sysconfig_network-scripts_ifup-ovs
> index 017346d..817f93f 100755
> --- a/rhel/etc_sysconfig_network-scripts_ifup-ovs
> +++ b/rhel/etc_sysconfig_network-scripts_ifup-ovs
> @@ -60,8 +60,16 @@ fi
> fi
> done
>
> -[ -f /var/lock/subsys/openvswitch ] || /sbin/service openvswitch start
> -
> +if [ -x /usr/bin/systemctl ]; then
> + if ! systemctl --quiet is-active openvswitch-nonetwork.service; then
> + /usr/bin/systemctl start openvswitch-nonetwork.service
> + fi
> +else
> + if [ ! -f /var/lock/subsys/openvswitch ]; then
> + /sbin/service openvswitch start
> + fi
> +fi
> +
> case "$TYPE" in
> OVSBridge)
> # If bridge already exists and is up, it has been configured
> through
> diff --git a/rhel/openvswitch-fedora.spec.in b/rhel/openvswitch-fedora.spec.in
> index 5384c32..e6b40a5 100644
> --- a/rhel/openvswitch-fedora.spec.in
> +++ b/rhel/openvswitch-fedora.spec.in
> @@ -45,6 +45,8 @@ install -d -m 755 $RPM_BUILD_ROOT/etc
> install -d -m 755 $RPM_BUILD_ROOT/etc/openvswitch
> install -p -D -m 0644 rhel/usr_lib_systemd_system_openvswitch.service \
> $RPM_BUILD_ROOT%{_unitdir}/openvswitch.service
> +install -p -D -m 0644
> rhel/usr_lib_systemd_system_openvswitch-nonetwork.service \
> + $RPM_BUILD_ROOT%{_unitdir}/openvswitch-nonetwork.service
> install -m 755 rhel/etc_init.d_openvswitch \
> $RPM_BUILD_ROOT%{_datadir}/openvswitch/scripts/openvswitch.init
> install -d -m 755 $RPM_BUILD_ROOT/etc/sysconfig
> @@ -101,6 +103,7 @@ systemctl start openvswitch.service
> %config /etc/sysconfig/openvswitch
> %config /etc/logrotate.d/openvswitch
> %{_unitdir}/openvswitch.service
> +%{_unitdir}/openvswitch-nonetwork.service
> %{_datadir}/openvswitch/scripts/openvswitch.init
> %{_sysconfdir}/sysconfig/network-scripts/ifup-ovs
> %{_sysconfdir}/sysconfig/network-scripts/ifdown-ovs
> diff --git a/rhel/usr_lib_systemd_system_openvswitch-nonetwork.service
> b/rhel/usr_lib_systemd_system_openvswitch-nonetwork.service
> new file mode 100644
> index 0000000..f9fc83d
> --- /dev/null
> +++ b/rhel/usr_lib_systemd_system_openvswitch-nonetwork.service
> @@ -0,0 +1,14 @@
> +[Unit]
> +Description=Open vSwitch Internal Unit
> +After=syslog.target
> +PartOf=openvswitch.service
> +Wants=openvswitch.service
> +
> +[Service]
> +Type=oneshot
> +EnvironmentFile=-/etc/sysconfig/openvswitch
> +RemainAfterExit=yes
> +ExecStart=/usr/share/openvswitch/scripts/ovs-ctl start --system-id=random \
> + $FORCE_COREFILES $OVSDB_SERVER_PRIORITY $VSWITCHD_PRIORITY \
> + $VSWITCHD_MLOCKALL $BRCOMPAT $OVS_CTL_OPTS
I think this will not work well.
If you see the rhel startup script, you will see code like this:
set ovs_ctl ${1-start}
if test X"$OVSDB_SERVER_PRIORITY" != X; then
set "$@" --ovsdb-server-priority="$OVSDB_SERVER_PRIORITY"
fi
"$@"
> +ExecStop=/usr/share/openvswitch/scripts/ovs-ctl stop
> diff --git a/rhel/usr_lib_systemd_system_openvswitch.service
> b/rhel/usr_lib_systemd_system_openvswitch.service
> index f39d7e6..6e08a9a 100644
> --- a/rhel/usr_lib_systemd_system_openvswitch.service
> +++ b/rhel/usr_lib_systemd_system_openvswitch.service
> @@ -1,12 +1,15 @@
> [Unit]
> -Description=Open vSwitch
> -After=syslog.target network.target
> +Description=Open vSwitch Unit
> +After=syslog.target
> +After=network.target
> +After=openvswitch-nonetwork.service
> +Requires=openvswitch-nonetwork.service
>
> [Service]
> Type=oneshot
> -ExecStart=/usr/share/openvswitch/scripts/openvswitch.init start
> -ExecStop=/usr/share/openvswitch/scripts/openvswitch.init stop
> RemainAfterExit=yes
> +ExecStart=/bin/true
> +ExecStop=/bin/true
>
> [Install]
> WantedBy=multi-user.target
> --
> 1.8.3.1
>
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