58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
"""
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Sample user-defined service.
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"""
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from core.misc.ipaddress import Ipv4Prefix
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from core.service import CoreService
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class MyService(CoreService):
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"""
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This is a sample user-defined service.
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"""
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# a unique name is required, without spaces
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name = "MyService"
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# you can create your own group here
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group = "Utility"
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# list executables that this service requires
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executables = ()
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# list of other services this service depends on
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dependencies = ()
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# per-node directories
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dirs = ()
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# generated files (without a full path this file goes in the node's dir,
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# e.g. /tmp/pycore.12345/n1.conf/)
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configs = ("myservice.sh",)
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# list of startup commands, also may be generated during startup
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startup = ("sh myservice.sh",)
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# list of shutdown commands
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shutdown = ()
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@classmethod
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def generate_config(cls, node, filename):
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"""
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Return a string that will be written to filename, or sent to the
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GUI for user customization.
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"""
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cfg = "#!/bin/sh\n"
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cfg += "# auto-generated by MyService (sample.py)\n"
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for ifc in node.netifs():
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cfg += 'echo "Node %s has interface %s"\n' % (node.name, ifc.name)
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# here we do something interesting
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cfg += "\n".join(map(cls.subnetentry, ifc.addrlist))
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break
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return cfg
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@staticmethod
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def subnetentry(x):
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"""
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Generate a subnet declaration block given an IPv4 prefix string
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for inclusion in the config file.
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"""
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if x.find(":") >= 0:
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# this is an IPv6 address
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return ""
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else:
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net = Ipv4Prefix(x)
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return 'echo " network %s"' % net
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