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key_name = '%s%s' % (context.project_id, CONF.vpn_key_suffix)
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keypair_api = compute.api.KeypairAPI()
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key_dir = os.path.join(CONF.keys_path, context.user_id)
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fileutils.ensure_tree(key_dir)
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key_path = os.path.join(key_dir, '%s.pem' % key_name)