Shulou(Shulou.com)06/01 Report--

Vm_info_dict = virtual_machine_info.objects.get (ip=vm_ip_addr) print (vm_info_dict) if vm_info_dict! = None: physical_server_ip = vm_info_dict.hostip device_info_dict = physical_server_info.objects.get (ip=physical_server_ip) phy_contain_vms = virtual_machine_info.objects.filter (hostip=physical_server_ip) else: token = gettoken ('xxxxx' 'xxxxx') vm_info_dict=getresponse (' https://xxxxx/API/v1/GetServerInfo/'+vm_ip_addr, token) physical_server_ip = vm_info_dict.get ("hostip") print (physical_server_ip) device_info_dict=getresponse ('https://xxxxxx/API/v1/GetDeviceInfo/'+physical_server_ip, token)

The overall idea is to obtain virtual machine information through Django API, and access it through API if it does not exist.

This problem seems strange, according to the wrong way of thinking, it should be dealt with in the exception catching department of exception, which is indeed possible, but if you want to extend the logic, the logic of exception handling will become heavier and heavier and feel strange.

So after repeated testing, we can see that if we use get to get the data, we will throw an error if we don't get it. I feel that this interface is still not very friendly, and we can implement it in another way, such as filter, because the slave table structure can be located to be a primary key or a unique index.

So the part of the code is adjusted according to the way of count, and then improved on this basis, that is, if it does not exist in the local database, then the access interface gets the database and sinks the database locally, the whole process is transparent for us to use, and it is also a relatively friendly way of interaction.

Vm_info_dict_exists = virtual_machine_info.objects.filter (ip=vm_ip_addr). Count () if vm_info_dict_exists > = 1:vm_info_dict = virtual_machine_info.objects.get (ip=vm_ip_addr) print (vm_info_dict) physical_server_ip = vm_info_dict.hostip device_info_dict = physical_server_info.objects.get (ip=physical_server_ip) phy_contain_vms = virtual_machine_info.objects.filter ( Hostip=physical_server_ip) return_dict ["device_info_dict"] = device_info_dictreturn_dict ["vm_info_dict"] = vm_info_dictreturn_dict ["phy_contain_vms"] = phy_contain_vms else:token = gettoken ('xxxx' 'xxxxxx') vm_info_dict = getresponse (' https://xxxxxx/API/v1/GetServerInfo/' + vm_ip_addr, token) physical_server_ip = vm_info_dict.get ("hostip") print (physical_server_ip) device_info_dict = getresponse ('https://xxxxxxxAPI/v1/GetDeviceInfo/' + physical_server_ip) Token) return_dict ["device_info_dict"] = device_info_dictreturn_dict ["vm_info_dict"] = vm_info_dictvm_info = virtual_machine_info () .vm_info.memo = vm_info_dict.get ("memo") vm_info.save () phy_exists = physical_server_info.objects.filter (ip=vm_info.hostip) .count () if phy_exists = = 0:phy_info = physical_server_info () Phy_exists = physical_server_info.objects.filter (ip=vm_info.hostip). Count () if phy_exists = = 0:phy_info = physical_server_info () phy_info.update_date = device_info_dict.get ("update_date"). Phy_info.memo = device_info_dict.get ("memo") phy_info.save () phy_contain_vms = virtual_machine_info.objects.filter (hostip=vm_info.hostip) return_dict ["phy_contain_vms"] = phy_contain_vms

In the future, I am going to make further improvements to these information, which can realize the incremental refresh of metadata, that is, when the data changes, I will call the API to refresh the data locally, otherwise it will remain unchanged.

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