Docker in Golang - Speaker Deck

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Go Docker The most popular Go project and how can you do the same. jamie sa [email protected] Product Manager Speed 3D Inc.

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Docker is

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A project started by Solomon Hykes http://www.forbes.com/sites/ benkepes/2013/10/29/docker- and-the-timely-pivot/ Almost got sold that time.

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an open source project to pack, ship and run any application as a lightweight container

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Open Source Highly active since very begining https://github.com/trending?l=go&since=monthly

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Lightweight Container Linux Containers LXC » Kernel namespaces (ipc, uts, mount, pid, network and user) » Chroots (using pivot_root) » Kernel capabilities » Control groups (cgroups)

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PID namespaces in the 2.6.24 kernel struct upid { int nr; /* moved from struct pid */ struct pid_namespace *ns; /* the namespace this value is visible in */ struct hlist_node pid_chain; /* moved from struct pid */ }; struct pid { atomic_t count; struct hlist_head tasks[PIDTYPE_MAX]; struct rcu_head rcu; int level; /* the number of upids */ struct upid numbers[0]; }; November 19, 2007

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Go-LXC Go Bindings for LXC in lxc.c pid_t go_lxc_init_pid(struct lxc_container *c) { return c->init_pid(c); } ...

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Creating an lxc container in Go func main() { c, err := lxc.NewContainer(name, lxcpath) if err != nil { log.Fatalf("ERROR: %s\n", err.Error()) } defer lxc.PutContainer(c) log.Printf("Creating container...\n") c.SetVerbosity(lxc.Verbose) if os.Geteuid() != 0 { if err := c.CreateAsUser(distro, release, arch); err != nil { log.Printf("ERROR: %s\n", err.Error()) } } else { if err := c.Create(template, "-a", arch, "-r", release); err != nil { log.Printf("ERROR: %s\n", err.Error()) } } }

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Before I try

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Most of the appeal for me is not the features that Go has, but rather the features that have been intentionally left out.

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After that certain date.

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Why Go? 1.Static compilation 2.Netural 3.It has what we need 4.Full development environment 5.Multi-arch build Jérôme Petazzoni, Docker and Go: why did we decide to write Docker in Go?

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Jan 19, 2013, Initial commit func (docker *Docker) Create(name string, command string, args []string, layers []string, config *Config) (*Container, error) { if docker.Exists(name) { return nil, fmt.Errorf("Container %v already exists", name) } root := path.Join(docker.repository, name) container, err := createContainer(name, root, command, args, layers, config) if err != nil { return nil, err } docker.containers.PushBack(container) return container, nil } by Andrea Luzzardi