def validate_template()

in lib/muchos/config/ec2.py [0:0]
56 lines of code
12 McCabe index (conditional complexity)

    def validate_template(self):
        if not self.cluster_template_d:
            exit(
                "ERROR - Template '{0}' is not defined!".format(
                    self.get("ec2", "cluster_template")
                )
            )

        if "worker" not in self.cluster_template_d:
            exit(
                "ERROR - '{0}' template config is invalid. No 'worker' "
                "launch request is defined".format(
                    self.cluster_template_d["id"]
                )
            )

        if "worker" not in self.cluster_template_d["devices"]:
            exit(
                "ERROR - '{0}' template is invalid. The devices file must "
                "have a 'worker' device map".format(
                    self.cluster_template_d["id"]
                )
            )

        if "default" not in self.cluster_template_d["devices"]:
            exit(
                "ERROR - '{0}' template is invalid. The devices file must "
                "have a 'default' device map".format(
                    self.cluster_template_d["id"]
                )
            )

        # Validate the selected launch template for each host

        worker_count = 0
        for hostname in self.node_d:
            # first service listed denotes the selected template
            selected_ec2_request = self.node_d[hostname][0]
            if "worker" == selected_ec2_request:
                worker_count = worker_count + 1
            else:
                if "worker" in self.node_d[hostname]:
                    exit(
                        "ERROR - '{0}' node config is invalid. The 'worker'"
                        " service should be listed first".format(hostname)
                    )
            if selected_ec2_request not in self.cluster_template_d:
                if len(self.node_d[hostname]) > 1:
                    print(
                        "Hint: In template mode, the first service listed"
                        " for a host denotes its EC2 template"
                    )
                exit(
                    "ERROR - '{0}' node config is invalid. No EC2 "
                    "template defined for the '{1}' service".format(
                        hostname, selected_ec2_request
                    )
                )

        if worker_count == 0:
            exit(
                "ERROR - No worker instances are defined "
                "for template '{0}'".format(self.cluster_template_d["id"])
            )