---
title: Using Weave with Systemd
menu_order: 40
search_type: Documentation
---


Having installed Weave Net as per [Installing Weave]({{ '/install/installing-weave' | relative_url }}), you might find it convenient to configure the
init daemon to start Weave on boot. Most recent Linux distribution releases ship with [systemd](http://www.freedesktop.org/wiki/Software/systemd/). The information below provides you with some initial guidance on getting a Weave Net service configured on a systemd-based OS.

## Weave Net Service Unit and Configuration

A regular service unit definition for Weave Net is shown below. This file is
normally placed in `/etc/systemd/system/weave.service`.

    [Unit]
    Description=Weave Network
    Documentation=http://docs.weave.works/weave/latest_release/
    Requires=docker.service
    After=docker.service
    [Service]
    EnvironmentFile=-/etc/sysconfig/weave
    ExecStartPre=/usr/local/bin/weave launch --no-restart $PEERS
    ExecStart=/usr/bin/docker attach weave
    ExecStop=/usr/local/bin/weave stop
    [Install]
    WantedBy=multi-user.target


To specify the addresses or names of other Weave hosts to join the network, 
create the `/etc/sysconfig/weave` environment file using the following format:

    PEERS="HOST1 HOST2 .. HOSTn"

You can also use the [`weave connect`]({{ '/tasks/manage/finding-adding-hosts-dynamically' | relative_url }}) command to add participating hosts dynamically.

Additionally, if you want to enable [encryption]({{ '/tasks/manage/security-untrusted-networks' | relative_url }}) specify a
password using `WEAVE_PASSWORD="wfvAwt7sj"` in the `/etc/sysconfig/weave` environment file, and it will get picked up by
Weave Net on launch. Recommendations for choosing a suitably strong password can be found [here]({{ '/tasks/manage/security-untrusted-networks' | relative_url }}).

You can now launch Weave Net using

    sudo systemctl start weave

To ensure Weave Net launches after reboot, run:

    sudo systemctl enable weave

For more information on systemd, please refer to the documentation supplied
with your distribution of Linux.

## SELinux Tweaks

If your OS has SELinux enabled and you want to run Weave Net as a systemd unit,
then follow the instructions below. These instructions apply to
CentOS and RHEL as of 7.0. On Fedora 21, there is no need to do this.

Once `weave` is installed in `/usr/local/bin`, set its execution
context with the commands shown below. You will need to have the
`policycoreutils-python` package installed.

    sudo semanage fcontext -a -t unconfined_exec_t -f f /usr/local/bin/weave
    sudo restorecon /usr/local/bin/weave

**See Also**

 * [Launching Weave Net]({{ '/install/using-weave' | relative_url }})
 * [Tutorials](https://www.weave.works/docs/tutorials/)
 * [Features]({{ '/overview/features' | relative_url }})
 * [Troubleshooting]({{ '/troubleshooting' | relative_url }})