| import logging |
| import os |
| import subprocess |
| from AgentConfig import AgentConfig |
| import Constants |
| |
| logger = logging.getLogger() |
| |
| class DockerManager(): |
| stored_status_command = '' |
| stored_command = '' |
| |
| def __init__(self, tmpdir, workroot, customServiceOrchestrator): |
| self.tmpdir = tmpdir |
| self.workroot = workroot |
| self.customServiceOrchestrator = customServiceOrchestrator |
| |
| def execute_command(self, command, store_command=False): |
| returncode = '' |
| out = '' |
| err = '' |
| |
| if store_command: |
| logger.info("Storing applied config: " + str(command['configurations'])) |
| self.stored_command = command |
| |
| if command['roleCommand'] == 'INSTALL': |
| returncode, out, err = self.pull_image(command) |
| if command['roleCommand'] == 'START': |
| returncode, out, err = self.start_container(command) |
| # need check |
| return {Constants.EXIT_CODE:returncode, 'stdout':out, 'stderr':err} |
| |
| def pull_image(self, command): |
| logger.info(str( command['configurations'])) |
| command_path = self.extract_config_from_command(command, 'docker.command_path') |
| imageName = self.extract_config_from_command(command, 'docker.image_name') |
| |
| docker_command = [command_path, 'pull', imageName] |
| logger.info("docker pull command: " + str(docker_command)) |
| return self.execute_command_on_linux(docker_command) |
| |
| |
| def extract_config_from_command(self, command, field): |
| value = '' |
| if 'configurations' in command: |
| if 'docker' in command['configurations']: |
| if field in command['configurations']['docker']: |
| logger.info(field + ': ' + str( command['configurations']['docker'][field])) |
| value = command['configurations']['docker'][field] |
| return value |
| |
| |
| # will evolve into a class hierarch, linux and windows |
| def execute_command_on_linux(self, docker_command): |
| proc = subprocess.Popen(docker_command, stdout = subprocess.PIPE) |
| out, err = proc.communicate() |
| logger.info("docker command output: " + str(out) + " err: " + str(err)) |
| return proc.returncode, out, err |
| |
| |
| def start_container(self, command): |
| #extracting param needed by docker run from the command passed from AM |
| command_path = self.extract_config_from_command(command, 'docker.command_path') |
| imageName = self.extract_config_from_command(command, 'docker.image_name') |
| options = self.extract_config_from_command(command, 'docker.options') |
| containerPort = self.extract_config_from_command(command, 'docker.container_port') |
| mounting_directory = self.extract_config_from_command(command, 'docker.mounting_directory') |
| memory_usage = self.extract_config_from_command(command, "docker.memory_usage") |
| additional_param = self.extract_config_from_command(command, 'docker.additional_param') |
| input_file_local_path = self.extract_config_from_command(command, 'docker.input_file.local_path') |
| input_file_mount_path = self.extract_config_from_command(command, 'docker.input_file.mount_path') |
| |
| docker_command = [command_path, "run"] |
| if options: |
| docker_command = self.add_docker_run_options_to_command(docker_command, options) |
| if containerPort: |
| self.add_port_binding_to_command(docker_command, command, containerPort) |
| if mounting_directory: |
| self.add_mnted_dir_to_command(docker_command, "/docker_use", mounting_directory) |
| if input_file_local_path: |
| self.add_mnted_dir_to_command(docker_command, "/inputDir", input_file_mount_path) |
| if memory_usage: |
| self.add_resource_restriction(docker_command, memory_usage) |
| self.add_container_name_to_command(docker_command, command) |
| docker_command.append(imageName) |
| if additional_param: |
| docker_command = self.add_additional_param_to_command(docker_command, additional_param) |
| logger.info("docker run command: " + str(docker_command)) |
| return self.execute_command_on_linux(docker_command) |
| |
| def add_docker_run_options_to_command(self, docker_command, options): |
| return docker_command + options.split(" ") |
| |
| def add_port_binding_to_command(self, docker_command, command, containerPort): |
| docker_command.append("-p") |
| hostPort = self.extract_config_from_command(command, 'docker.host_port') |
| if not hostPort: |
| #this is the list of allowed port range specified in appConfig |
| allowedPorts = self.customServiceOrchestrator.get_allowed_ports(command) |
| #if the user specify hostPort in appConfig, then we use it, otherwise allocate it |
| allocated_for_this_component_format = "${{{0}.ALLOCATED_PORT}}" |
| component = command['componentName'] |
| port_allocation_req = allocated_for_this_component_format.format(component) |
| hostPort = self.customServiceOrchestrator.allocate_ports(port_allocation_req, port_allocation_req, allowedPorts) |
| docker_command.append(hostPort+":"+containerPort) |
| |
| def add_mnted_dir_to_command(self, docker_command, host_dir, container_dir): |
| docker_command.append("-v") |
| tmp_mount_dir = self.workroot + host_dir |
| docker_command.append(tmp_mount_dir+":"+container_dir) |
| |
| def add_container_name_to_command(self, docker_command, command): |
| docker_command.append("-name") |
| docker_command.append(self.get_container_id(command)) |
| |
| def add_additional_param_to_command(self, docker_command, additional_param): |
| return docker_command + additional_param.split(" ") |
| |
| def get_container_id(self, command): |
| # will make this more resilient to changes |
| return self.tmpdir[-30:-2] |
| |
| def add_resource_restriction(self, docker_command, memory_usage): |
| docker_command.append("-m") |
| docker_command.append(memory_usage) |
| |
| def query_status(self, command): |
| if command['roleCommand'] == "GET_CONFIG": |
| return self.getConfig(command) |
| else: |
| returncode = '' |
| out = '' |
| err = '' |
| status_command_str = self.extract_config_from_command(command, 'docker.status_command') |
| if status_command_str: |
| self.stored_status_command = status_command_str.split(" ") |
| logger.info("status command" + str(self.stored_status_command)) |
| if self.stored_status_command: |
| returncode, out, err = self.execute_command_on_linux(self.stored_status_command) |
| logger.info("status of the app in docker container: " + str(returncode) + str(out) + str(err)) |
| return {Constants.EXIT_CODE:returncode, 'stdout':out, 'stderr':err} |
| |
| def getConfig(self, command): |
| logger.info("get config command: " + str(command)) |
| if 'configurations' in self.stored_command: |
| if 'commandParams' in command and 'config_type' in command['commandParams']: |
| config_type = command['commandParams']['config_type'] |
| logger.info("Requesting applied config for type {0}".format(config_type)) |
| if config_type in self.stored_command['configurations']: |
| logger.info("get config result: " + self.stored_command['configurations'][config_type]) |
| return { |
| 'configurations': {config_type: self.stored_command['configurations'][config_type]} |
| } |
| else: |
| return { |
| 'configurations': {} |
| } |
| pass |
| else: |
| logger.info("Requesting all applied config." + str(self.stored_command['configurations'])) |
| return { |
| 'configurations': self.stored_command['configurations'] |
| } |
| pass |
| else: |
| return { |
| 'configurations': {} |
| } |
| pass |
| |
| def stop_container(self): |
| docker_command = ["/usr/bin/docker", "stop"] |
| docker_command.append(self.get_container_id(docker_command)) |
| logger.info("docker stop: " + str(docker_command)) |
| code, out, err = self.execute_command_on_linux(docker_command) |
| logger.info("output: " + str(out)) |
| |
