Google lmctfy 4.0 - flow of creating a container

柯锋

2023-12-01

For checking the error of memory.stale_page_age, I looked around the flow of creating a container, taking memory 100M for a example.

The flow is very clear from command respond to derived handler work.

HandleCommand

RegisterCommands

RegisterCreateCommand

CreateContainer(const vector<string> &argv, const ContainerApi *lmctfy,vector<OutputMap> *output)

RunCommand(const vector<string> &args, OutputMap::Style output_style, ContainerApiFactory *lmctfy_factory)

ContainerApiImpl

ContainerApi

std::map<ResourceType, ResourceHandlerFactory *> resource_factories_

Create(StringPiece container_name, const ContainerSpec &spec)

type_handler_pair.second->Create(resolved_name, spec)

CgroupResourceHandlerFactory

ResourceHandlerFactory

Create(const string &container_name,const ContainerSpec &spec)

CgroupResourceHandler

ResourceHandler

CreateResource(const ContainerSpec &spec)

MemoryResourceHandler

CgroupResourceHandler

CreateOnlySetup(const ContainerSpec &spec)

memory_controller_->SetStalePageAge(1);

SetParamInt(KernelFiles::Memory::kStalePageAge, scan_cycles)

SetParamString(cgroup_file, Substitute("$0", value))

WriteStringToFile(file_path, value)

const char KernelFiles::Memory::kStalePageAge[] = "memory.stale_page_age";