{"id":18739940,"url":"https://github.com/withlin/micro-docker","last_synced_at":"2025-11-19T17:30:17.118Z","repository":{"id":96511337,"uuid":"179438483","full_name":"withlin/micro-docker","owner":"withlin","description":"a micro-docker implement","archived":false,"fork":false,"pushed_at":"2019-04-19T08:48:24.000Z","size":10,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2024-12-28T18:32:40.622Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/withlin.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2019-04-04T06:48:57.000Z","updated_at":"2019-04-19T08:48:26.000Z","dependencies_parsed_at":null,"dependency_job_id":"f0ffb643-5c7e-4d60-a2e7-d07558645a9a","html_url":"https://github.com/withlin/micro-docker","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/withlin%2Fmicro-docker","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/withlin%2Fmicro-docker/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/withlin%2Fmicro-docker/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/withlin%2Fmicro-docker/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/withlin","download_url":"https://codeload.github.com/withlin/micro-docker/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":239619572,"owners_count":19669447,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-07T15:37:57.343Z","updated_at":"2025-11-19T17:30:17.019Z","avatar_url":"https://github.com/withlin.png","language":"Go","funding_links":[],"categories":[],"sub_categories":[],"readme":"# micro-docker\na micro-docker implement\n\n## Linux 6种 Namespace 的实现\n\nNamespace的类型 | 系统调用参数 |  内核版本\n-|-|-\nMount Namespace   | CLONE_NEWNS   | 2.4.19  |\nUTS Namespace     | CLONE_NEWUTS  | 2.6.19  |\nNetwork Namespace | CLONE_NEWNET  | 2.4.19  |\nIPC Namespace     | CLONE_NEWIPC  | 2.6.19  |\nPID Namespace     | CLONE_NEWPID  | 2.6.24  |\nUSER Namespace    | CLONE_NEWUSER | 3.8     |\n\n\n## Cgroup\n\n* cgroup是对进程分组管理的一种机制，一个cgroup包含一组进程，并且可以在这个cgroup\n  上增加Linux subsystem的各种配置，讲一组进程和一组subsystem的系统参数关联起来。\n\n* subsystem 是一组资源控制的模块，一般包含如下几项：\n  * blkio 设置对块设备(比如硬盘) 输入输出的访问控制\n  * cpu 设置cgroup中进程的CPU被调度策略。\n  * cpuacct 可以统计从cgroup中进程CPU占用。\n  * cpuset 在多核机器上设设置cgroup中进程可以使用CPU和内存(此处内存仅仅使用于NUMA啊架构)。\n  * devices 控制cgroup中进程对设备的访问。\n  * freezer 用于挂起(suspend)和恢复(resume) cgroup中的进程。\n  * memory 用于控制cgroup中进程的内存占用。\n  * net_cls 用于讲cgroup中进程产生的网络包分类，以便Linux的tc (traffic controller) 可以\n    根据分类区分出来某个cgroup的包并做限流或者监控。\n  * net_prio 设置cgroup中进程产生的网络流量的优先级\n  * ns 这个subsystem比较特殊，它的作用是使cgroup中的进程在新的Namesapce中fork新进程(NEWNS)时，\n    创建出一个新的cgroup，这个cgroup包含新的Namesapce中的进程\n\n* hierarchy的功能是把一组cgroup串成一个树状结构，一个这样的树状结构便是一个hierarchy\n  通过这种树状结构，Cgroup可以做到继承。比如，系统对一组定时的任务进程通过cgroup1限制了\n  CPU的使用率，然后其中有一个定时dump日志的进程还需要限制磁盘IO，为避免限制磁盘IO之后影\n  响其他进程，就可以创建cgroup2，使其继承了cgroup1并且限制磁盘IO，这样cgroup2便继承了\n  cgroup1中对CPU使用率的限制，并且增加了磁盘IO的限制而不影响到cgroup1中的其他进程。\n\n\n* 系统在创建新的hierarchy之后，系统所有的进程都会加入这个hierarchy的cgroup根节点，\n  这个cgroup根节点是hierarchy默认创建的。\n\n* 一个subsystem只能附加到一个hierarchy上面。\n\n* 一个heirarchy可以附加多个subsystem。\n\n* 一个进程可以当作为多个cgroup的成员，但是这些cgroup必须在不同的hierarchy中。\n\n* 一个进程fork出子进程时，子进程和父进程在同一个cgroup中，也可以根据需要将其移动\n  到其他cgroup中。","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwithlin%2Fmicro-docker","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwithlin%2Fmicro-docker","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwithlin%2Fmicro-docker/lists"}