From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ondrej Mular Date: Mon, 9 Jun 2014 10:43:31 -0400 (EDT) Subject: [Cluster-devel] [PATCH] fence_docker: new fence agent for Docker containers In-Reply-To: <848848437.16562712.1402324499040.JavaMail.zimbra@redhat.com> Message-ID: <131522850.16569170.1402325011684.JavaMail.zimbra@redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit --- .gitignore | 1 + configure.ac | 1 + fence/agents/docker/Makefile.am | 18 ++++++ fence/agents/docker/fence_docker.py | 72 +++++++++++++++++++++++ tests/data/metadata/fence_docker.xml | 109 +++++++++++++++++++++++++++++++++++ 5 files changed, 201 insertions(+) create mode 100644 fence/agents/docker/Makefile.am create mode 100644 fence/agents/docker/fence_docker.py create mode 100644 tests/data/metadata/fence_docker.xml diff --git a/.gitignore b/.gitignore index 75b9aa7..8bcae2b 100644 --- a/.gitignore +++ b/.gitignore @@ -39,6 +39,7 @@ fence/agents/bullpap/fence_bullpap fence/agents/cisco_mds/fence_cisco_mds fence/agents/cisco_ucs/fence_cisco_ucs fence/agents/cpint/fence_cpint +fence/agents/docker/fence_docker fence/agents/drac/fence_drac fence/agents/drac5/fence_drac5 fence/agents/eaton_snmp/fence_eaton_snmp diff --git a/configure.ac b/configure.ac index 4d0aa6a..bc9785b 100644 --- a/configure.ac +++ b/configure.ac @@ -264,6 +264,7 @@ AC_CONFIG_FILES([Makefile fence/agents/brocade/Makefile fence/agents/cisco_mds/Makefile fence/agents/cisco_ucs/Makefile + fence/agents/docker/Makefile fence/agents/drac/Makefile fence/agents/drac5/Makefile fence/agents/dummy/Makefile diff --git a/fence/agents/docker/Makefile.am b/fence/agents/docker/Makefile.am new file mode 100644 index 0000000..f3d53be --- /dev/null +++ b/fence/agents/docker/Makefile.am @@ -0,0 +1,18 @@ +MAINTAINERCLEANFILES = Makefile.in + +TARGET = fence_docker + +SRC = $(TARGET).py + +EXTRA_DIST = $(SRC) + +sbin_SCRIPTS = $(TARGET) + +man_MANS = $(TARGET).8 + +include $(top_srcdir)/make/fencebuild.mk +include $(top_srcdir)/make/fenceman.mk +include $(top_srcdir)/make/agentpycheck.mk + +clean-local: clean-man + rm -f $(TARGET) diff --git a/fence/agents/docker/fence_docker.py b/fence/agents/docker/fence_docker.py new file mode 100644 index 0000000..63ce6b8 --- /dev/null +++ b/fence/agents/docker/fence_docker.py @@ -0,0 +1,72 @@ +#!/usr/bin/python -tt + +import atexit +import sys +import docker +import logging + +sys.path.append("@FENCEAGENTSLIBDIR@") +from fencing import fail_usage, all_opt, fence_action, atexit_handler, check_input, process_input, show_docs, run_delay, fail, EC_LOGIN_DENIED + +#BEGIN_VERSION_GENERATION +RELEASE_VERSION = "" +REDHAT_COPYRIGHT = "" +BUILD_DATE = "" +#END_VERSION_GENERATION + +def get_power_status(conn, options): + try: + status = conn.inspect_container(container=options["--plug"]) + return "on" if status["State"]["Running"] else "off" + except Exception: + return None + + +def set_power_status(conn, options): + if options["--action"] == "on": + conn.start(container=options["--plug"]) + else: + conn.kill(container=options["--plug"]) + return + + +def reboot_cycle(conn, options): + conn.restart(container=options["--plug"], timeout=float(options["--power-timeout"])) + return get_power_status(conn, options) + + +def get_list(conn, options): + output = conn.containers(all=True) + containers = {} + for container in output: + containers[container["Id"]] = ("; ".join(container["Names"]), {True:"off", False: "on"}[container["Status"][:4].lower() == "exit"]) + return containers + + +def main(): + atexit.register(atexit_handler) + + device_opt = ["ipaddr", "no_password", "port", "method"] + + options = check_input(device_opt, process_input(device_opt)) + + docs = { } + docs["shortdesc"] = "Fence agent for Docker" + docs["longdesc"] = "fence_docker is I/O fencing agent which can be used with the Docker Engine containers." + docs["vendorurl"] = "www.docker.io" + show_docs(options, docs) + + run_delay(options) + + conn = docker.Client(base_url = "http://" + options["--ip"] + ":" + str(options["--ipport"]), version = "1.9", timeout = float(options["--shell-timeout"])) + + try: + result = fence_action(conn, options, set_power_status, get_power_status, get_list, reboot_cycle) + except IOError as ex: + logging.debug(ex.message) + fail(EC_LOGIN_DENIED) + + sys.exit(result) + +if __name__ == "__main__": + main() diff --git a/tests/data/metadata/fence_docker.xml b/tests/data/metadata/fence_docker.xml new file mode 100644 index 0000000..19cdd0a --- /dev/null +++ b/tests/data/metadata/fence_docker.xml @@ -0,0 +1,109 @@ + + +fence_docker is I/O fencing agent which can be used with the Docker Engine containers. +www.docker.io + + + + + TCP/UDP port to use for connection with device + + + + + Forces agent to use IPv6 addresses only + + + + + IP Address or Hostname + + + + + + Method to fence (onoff|cycle) + + + + + Fencing Action + + + + + Forces agent to use IPv4 addresses only + + + + + Physical plug number, name of virtual machine or UUID + + + + + Verbose mode + + + + + Write debug information to given file + + + + + Display version information and exit + + + + + Display help and exit + + + + + Separator for CSV created by operation list + + + + + Wait X seconds for cmd prompt after issuing command + + + + + Test X seconds for status change after ON/OFF + + + + + Wait X seconds after issuing ON/OFF + + + + + Wait X seconds before fencing is started + + + + + Wait X seconds for cmd prompt after login + + + + + Count of attempts to retry power on + + + + + + + + + + + + -- 1.8.3.1