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kevacoin/doc/init.md

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Sample init scripts and service configuration for bitcoind

Sample scripts and configuration files for systemd, Upstart and OpenRC can be found in the contrib/init folder.

contrib/init/bitcoind.service:    systemd service unit configuration
contrib/init/bitcoind.openrc:     OpenRC compatible SysV style init script
contrib/init/bitcoind.openrcconf: OpenRC conf.d file
contrib/init/bitcoind.conf:       Upstart service configuration file
contrib/init/bitcoind.init:       CentOS compatible SysV style init script
  1. Service User

All three Linux startup configurations assume the existence of a "bitcoin" user and group. They must be created before attempting to use these scripts. The OS X configuration assumes bitcoind will be set up for the current user.

  1. Configuration

At a bare minimum, bitcoind requires that the rpcpassword setting be set when running as a daemon. If the configuration file does not exist or this setting is not set, bitcoind will shutdown promptly after startup.

This password does not have to be remembered or typed as it is mostly used as a fixed token that bitcoind and client programs read from the configuration file, however it is recommended that a strong and secure password be used as this password is security critical to securing the wallet should the wallet be enabled.

If bitcoind is run with the "-server" flag (set by default), and no rpcpassword is set, it will use a special cookie file for authentication. The cookie is generated with random content when the daemon starts, and deleted when it exits. Read access to this file controls who can access it through RPC.

By default the cookie is stored in the data directory, but it's location can be overridden with the option '-rpccookiefile'.

This allows for running bitcoind without having to do any manual configuration.

conf, pid, and wallet accept relative paths which are interpreted as relative to the data directory. wallet only supports relative paths.

For an example configuration file that describes the configuration settings, see contrib/debian/examples/bitcoin.conf.

  1. Paths

3a) Linux

All three configurations assume several paths that might need to be adjusted.

Binary: /usr/bin/bitcoind
Configuration file: /etc/bitcoin/bitcoin.conf
Data directory: /var/lib/bitcoind
PID file: /var/run/bitcoind/bitcoind.pid (OpenRC and Upstart) or /var/lib/bitcoind/bitcoind.pid (systemd)
Lock file: /var/lock/subsys/bitcoind (CentOS)

The configuration file, PID directory (if applicable) and data directory should all be owned by the bitcoin user and group. It is advised for security reasons to make the configuration file and data directory only readable by the bitcoin user and group. Access to bitcoin-cli and other bitcoind rpc clients can then be controlled by group membership.

3b) Mac OS X

Binary: /usr/local/bin/bitcoind
Configuration file: ~/Library/Application Support/Bitcoin/bitcoin.conf
Data directory: ~/Library/Application Support/Bitcoin Lock file: ~/Library/Application Support/Bitcoin/.lock

  1. Installing Service Configuration

4a) systemd

Installing this .service file consists of just copying it to /usr/lib/systemd/system directory, followed by the command systemctl daemon-reload in order to update running systemd configuration.

To test, run systemctl start bitcoind and to enable for system startup run systemctl enable bitcoind

4b) OpenRC

Rename bitcoind.openrc to bitcoind and drop it in /etc/init.d. Double check ownership and permissions and make it executable. Test it with /etc/init.d/bitcoind start and configure it to run on startup with rc-update add bitcoind

4c) Upstart (for Debian/Ubuntu based distributions)

Drop bitcoind.conf in /etc/init. Test by running service bitcoind start it will automatically start on reboot.

NOTE: This script is incompatible with CentOS 5 and Amazon Linux 2014 as they use old versions of Upstart and do not supply the start-stop-daemon utility.

4d) CentOS

Copy bitcoind.init to /etc/init.d/bitcoind. Test by running service bitcoind start.

Using this script, you can adjust the path and flags to the bitcoind program by setting the BITCOIND and FLAGS environment variables in the file /etc/sysconfig/bitcoind. You can also use the DAEMONOPTS environment variable here.

4e) Mac OS X

Copy org.bitcoin.bitcoind.plist into ~/Library/LaunchAgents. Load the launch agent by running launchctl load ~/Library/LaunchAgents/org.bitcoin.bitcoind.plist.

This Launch Agent will cause bitcoind to start whenever the user logs in.

NOTE: This approach is intended for those wanting to run bitcoind as the current user. You will need to modify org.bitcoin.bitcoind.plist if you intend to use it as a Launch Daemon with a dedicated bitcoin user.

  1. Auto-respawn

Auto respawning is currently only configured for Upstart and systemd. Reasonable defaults have been chosen but YMMV.