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Online Meetup: Why should container system / platform builders care about containerd 1.0?

Docker, Inc.
Docker, Inc.

Docker and the CNCF recently announced the general availability of containerd 1.0, an industry-standard runtime for building container solutions. The containerd 1.0 milestone comes after several months of alpha and beta releases, that allowed the team to implement various performance improvements: creation of a stress testing system, improvements in garbage collection and shim memory usage, etc. In this online meetup, we look at how containerd works, what are the top features and improvements and how can container system builders integrate with containerd.

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Tour of containerd Jessica Valarezo, Docker Derek McGowan, Docker December 18th, 2017
Agenda ▪ Introduction to containerd ▪ Top features and improvements ▪ Getting started with containerd + demo ▪ Contributing to containerd
What is it???? kənˈtānər D container-dee
Technical Goals ▪ Clean gRPC-based API + client library ▪ Runtime agility: full OCI support ▪ Stability and performance with tight, well-defined core of container function ▪ Decoupled systems (image, filesystem, runtime) for pluggability, reuse
MetadataStorage Architecture ContainersContent DiffSnapshot Images GRPC API Metrics API Events Runtimes Tasks RuntimesOS
Architecture containerd OS (Storage, FS, Networking) Runtimes (runc, kata) API Client (moby, cri-containerd, etc.)
{ "schemaVersion": 2, "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json", "manifests": [ { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2094, "digest": "sha256:7820f9a86d4ad15a2c4f0c0e5479298df2aa7c2f6871288e2ef8546f3e7b6783", "platform": { "architecture": "ppc64le", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 1922, "digest": "sha256:ae1b0e06e8ade3a11267564a26e750585ba2259c0ecab59ab165ad1af41d1bdd", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse" ] } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:e4c0df75810b953d6717b8f8f28298d73870e8aa2a0d5e77b8391f16fdfbbbe2", "platform": { "architecture": "s390x", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:07ebe243465ef4a667b78154ae6c3ea46fdb1582936aac3ac899ea311a701b40", "platform": { "architecture": "arm", "os": "linux", "variant": "armv7" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2090, "digest": "sha256:fb2fc0707b86dafa9959fe3d29e66af8787aee4d9a23581714be65db4265ad8a", "platform": { "architecture": "arm64", "os": "linux", "variant": "armv8" } Image Formats Index (Manifest List) linux amd64 linux ppc64le windows amd64 Manifests: Manifest linux arm64 Layers: Image Config: L0 Ln C Digest Layer File 0 Layer File 1 Layer File N L1 Digest Digest Digest Digest Docker and OCI compatible
Content Addressability digest.FromString(“foo”) -> “sha256:2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae” digest.FromString(“foo tampered”) -> “sha256:51f7f1d1f6bebed72b936c8ea257896cb221b91d303c5b5c44073fce33ab8dd8” sha256:2c26b foo digest.FromString(“bar sha256:2c...”) -> “sha256:2e94890c66fbcccca9ad680e1b1c933cc323a5b4bcb14cc8a4bc78bb88d41055” tampered sha256:2e948 bar sha256:2c26b
{ "schemaVersion": 2, "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json", "manifests": [ { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2094, "digest": "sha256:7820f9a86d4ad15a2c4f0c0e5479298df2aa7c2f6871288e2ef8546f3e7b6783", "platform": { "architecture": "ppc64le", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 1922, "digest": "sha256:ae1b0e06e8ade3a11267564a26e750585ba2259c0ecab59ab165ad1af41d1bdd", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse" ] } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:e4c0df75810b953d6717b8f8f28298d73870e8aa2a0d5e77b8391f16fdfbbbe2", "platform": { "architecture": "s390x", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:07ebe243465ef4a667b78154ae6c3ea46fdb1582936aac3ac899ea311a701b40", "platform": { "architecture": "arm", "os": "linux", "variant": "armv7" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2090, "digest": "sha256:fb2fc0707b86dafa9959fe3d29e66af8787aee4d9a23581714be65db4265ad8a", "platform": { "architecture": "arm64", "os": "linux", "variant": "armv8" } Image Formats Index (Manifest List) linux amd64 linux ppc64le windows amd64 Manifests: Manifest linux arm64 Layers: Image Config: L0 L1 Ln Root Filesystem /usr /bin /dev /etc /home /lib C OCI Runtime Spec process args env cwd … root mounts Docker and OCI compatible OCI Image Spec containerd containerd
Snapshotters How do you build a container root filesystem?
Storage Architecture Snapshotter “layer snapshots” Content Store “content addressed blobs” Metadata Store “references” Runtime spec Rootfs (mounts)
Snapshots type Snapshotter interface { Stat(key string) (Info, error) Mounts(key string) ([]containerd.Mount, error) Prepare(key, parent string) ([]containerd.Mount, error) View(key, parent string) ([]containerd.Mount, error) Commit(name, key string) error Remove(key string) error Walk(fn func(Info) error) error } type Info struct { Name string // name or key of snapshot Parent string Kind Kind } type Kind int const ( KindActive KindView KindCommitted )
Active Committed Prepare(a, P0 ) Commit(P1 , a′) Snapshot Model P0a a′ b P1 P2 Commit(P2 , b) Remove(b) Prepare(b, P1 )
Pulling an Image Data Flow Pull Fetch Content Images Snapshots Unpack Events Remote registry Mounts
Demo
API Client containerd Tasks and Runtime Runtimes Tasks Service Containers Service Meta Runtime Spec Mounts linux containerd-shim containerd-shim containerd-shim containerd-shim wcow hcsshim VM VM VM VM lcow VM VM hcsshim VM VM VM VM VM VM
Starting a Container Images Snapshot Run Prepare Start Events Running Containers Containers Tasks Create
Example: Pull an Image Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr pull docker.io/library/redis:alpine $ ctr image ls import ( "context" "github.com/containerd/containerd" "github.com/containerd/containerd/namespaces" ) // connect to our containerd daemon client, err := containerd.New("/run/containerd/containerd.sock") defer client.Close() // set our namespace to “example”: ctx := namespaces.WithNamespace(context.Background(), "example") // pull the alpine-based redis image from DockerHub: image, err := client.Pull(ctx, "docker.io/library/redis:alpine", containerd.WithPullUnpack)
Example: Run a Container Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr run -t docker.io/library/redis:alpine redis-server $ ctr c ls // create our container metadata object and runtime config // allocate a new RW root filesystem for container based on the image container, err := client.NewContainer(ctx, "redis-server", containerd.WithNewSnapshot(“redis-rootfs”, image), containerd.WithNewSpec(oci.WithImageConfig(image)), ) defer container.Delete() // create a task from the container task, err := container.NewTask(ctx, containerd.Stdio) defer task.Delete(ctx) // make sure we wait before calling start exitStatusC, err := task.Wait(ctx) // call start on the task // starts the redis-server process in the container if err := task.Start(ctx); err != nil { return err }
Example: Kill a Task Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr t kill redis-server $ ctr t ls // make sure we wait before calling start exitStatusC, err := task.Wait(ctx) time.Sleep(3 * time.Second) if err := task.Kill(ctx, syscall.SIGTERM); err != nil { return err } // retrieve the process exit status from the channel status := <-exitStatusC code, exitedAt, err := status.Result() if err != nil { return err } // print out the exit code from the process fmt.Printf("redis-server exited with status: %dn", code)
# HELP container_blkio_io_service_bytes_recursive_bytes The blkio io service bytes recursive # TYPE container_blkio_io_service_bytes_recursive_bytes gauge container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Async"} 1.07159552e+08 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Read"} 0 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Sync"} 81920 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Total"} 1.07241472e+08 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Write"} 1.07241472e+08 # HELP container_blkio_io_serviced_recursive_total The blkio io servied recursive # TYPE container_blkio_io_serviced_recursive_total gauge container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Async"} 892 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Read"} 0 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Sync"} 888 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Total"} 1780 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Write"} 1780 # HELP container_cpu_kernel_nanoseconds The total kernel cpu time # TYPE container_cpu_kernel_nanoseconds gauge container_cpu_kernel_nanoseconds{container_id="foo4",namespace="default"} 2.6e+08 # HELP container_cpu_throttle_periods_total The total cpu throttle periods # TYPE container_cpu_throttle_periods_total gauge container_cpu_throttle_periods_total{container_id="foo4",namespace="default"} 0 # HELP container_cpu_throttled_periods_total The total cpu throttled periods # TYPE container_cpu_throttled_periods_total gauge container_cpu_throttled_periods_total{container_id="foo4",namespace="default"} 0 # HELP container_cpu_throttled_time_nanoseconds The total cpu throttled time # TYPE container_cpu_throttled_time_nanoseconds gauge container_cpu_throttled_time_nanoseconds{container_id="foo4",namespace="default"} 0 # HELP container_cpu_total_nanoseconds The total cpu time # TYPE container_cpu_total_nanoseconds gauge container_cpu_total_nanoseconds{container_id="foo4",namespace="default"} 1.003301578e+09 # HELP container_cpu_user_nanoseconds The total user cpu time # TYPE container_cpu_user_nanoseconds gauge container_cpu_user_nanoseconds{container_id="foo4",namespace="default"} 7e+08 # HELP container_hugetlb_failcnt_total The hugetlb failcnt # TYPE container_hugetlb_failcnt_total gauge container_hugetlb_failcnt_total{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_failcnt_total{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_hugetlb_max_bytes The hugetlb maximum usage # TYPE container_hugetlb_max_bytes gauge container_hugetlb_max_bytes{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_max_bytes{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_hugetlb_usage_bytes The hugetlb usage # TYPE container_hugetlb_usage_bytes gauge container_hugetlb_usage_bytes{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_usage_bytes{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_memory_active_anon_bytes The active_anon amount # TYPE container_memory_active_anon_bytes gauge container_memory_active_anon_bytes{container_id="foo4",namespace="default"} 2.658304e+06 # HELP container_memory_active_file_bytes The active_file amount # TYPE container_memory_active_file_bytes gauge container_memory_active_file_bytes{container_id="foo4",namespace="default"} 7.319552e+06 # HELP container_memory_cache_bytes The cache amount used # TYPE container_memory_cache_bytes gauge container_memory_cache_bytes{container_id="foo4",namespace="default"} 5.0597888e+07 # HELP container_memory_dirty_bytes The dirty amount Metrics
Supported Components Component Status Stabilized Version Links GRPC API Stable 1.0 api/ Metrics API Stable 1.0 Go client API Unstable 1.1 tentative godoc ctr tool Unstable Out of scope -
Support Horizon Release Status Start End of Life 0.0 End of Life Dec 4, 2015 - 0.1 End of Life Mar 21, 2016 - 0.2 End of Life Apr 21, 2016 Dec 5, 2017 1.0 Active Dec 5, 2017 max(Dec 5, 2018, release of 1.1.0) 1.1 Next TBD max(TBD+1 year, release of 1.2.0)
One point Ohhhhhhhhhh!
Stress testing create/start/delete 678 containers in 60.144 seconds (11.273 c/sec) or (0.089 sec/c) failures=0
Garbage Collection Im age
containerd-shim reduction container shim 15320 kB RSS 3644 kB RSS
Use cases - CURRENT - Docker (moby) - Kubernetes (cri-containerd) - LinuxKit - BuildKit - FUTURE/POTENTIAL - IBM Cloud/Bluemix - OpenFaaS - {your project here}
Going further with containerd ▪ Contributing: Bug fixes, adding tests, improving docs, validation https://github.com/containerd/containerd ▪ Using: See the getting started documentation in the docs folder of the repo https://github.com/containerd/containerd/blob/master/docs/getting-started.md ▪ Porting/testing: Other architectures & OSs, stress testing (see bucketbench, containerd-stress): git clone <repo>, make binaries, sudo make install ▪ K8s CRI: incubation project to use containerd as CRI In beta today; e2e tests, validation, contributing
Thank You! Questions? ▪ Jessica Valarezo ▫ https://github.com/jessvalarezo ▫ jessica.valarezo@docker.com ▫ Twitter: @jessvalarezo1
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Online Meetup: Why should container system / platform builders care about containerd 1.0?

  • 1. Tour of containerd Jessica Valarezo, Docker Derek McGowan, Docker December 18th, 2017
  • 2. Agenda ▪ Introduction to containerd ▪ Top features and improvements ▪ Getting started with containerd + demo ▪ Contributing to containerd
  • 4. Technical Goals ▪ Clean gRPC-based API + client library ▪ Runtime agility: full OCI support ▪ Stability and performance with tight, well-defined core of container function ▪ Decoupled systems (image, filesystem, runtime) for pluggability, reuse
  • 5. MetadataStorage Architecture ContainersContent DiffSnapshot Images GRPC API Metrics API Events Runtimes Tasks RuntimesOS
  • 6. Architecture containerd OS (Storage, FS, Networking) Runtimes (runc, kata) API Client (moby, cri-containerd, etc.)
  • 7. { "schemaVersion": 2, "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json", "manifests": [ { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2094, "digest": "sha256:7820f9a86d4ad15a2c4f0c0e5479298df2aa7c2f6871288e2ef8546f3e7b6783", "platform": { "architecture": "ppc64le", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 1922, "digest": "sha256:ae1b0e06e8ade3a11267564a26e750585ba2259c0ecab59ab165ad1af41d1bdd", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse" ] } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:e4c0df75810b953d6717b8f8f28298d73870e8aa2a0d5e77b8391f16fdfbbbe2", "platform": { "architecture": "s390x", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:07ebe243465ef4a667b78154ae6c3ea46fdb1582936aac3ac899ea311a701b40", "platform": { "architecture": "arm", "os": "linux", "variant": "armv7" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2090, "digest": "sha256:fb2fc0707b86dafa9959fe3d29e66af8787aee4d9a23581714be65db4265ad8a", "platform": { "architecture": "arm64", "os": "linux", "variant": "armv8" } Image Formats Index (Manifest List) linux amd64 linux ppc64le windows amd64 Manifests: Manifest linux arm64 Layers: Image Config: L0 Ln C Digest Layer File 0 Layer File 1 Layer File N L1 Digest Digest Digest Digest Docker and OCI compatible
  • 8. Content Addressability digest.FromString(“foo”) -> “sha256:2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae” digest.FromString(“foo tampered”) -> “sha256:51f7f1d1f6bebed72b936c8ea257896cb221b91d303c5b5c44073fce33ab8dd8” sha256:2c26b foo digest.FromString(“bar sha256:2c...”) -> “sha256:2e94890c66fbcccca9ad680e1b1c933cc323a5b4bcb14cc8a4bc78bb88d41055” tampered sha256:2e948 bar sha256:2c26b
  • 9. { "schemaVersion": 2, "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json", "manifests": [ { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2094, "digest": "sha256:7820f9a86d4ad15a2c4f0c0e5479298df2aa7c2f6871288e2ef8546f3e7b6783", "platform": { "architecture": "ppc64le", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 1922, "digest": "sha256:ae1b0e06e8ade3a11267564a26e750585ba2259c0ecab59ab165ad1af41d1bdd", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse" ] } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:e4c0df75810b953d6717b8f8f28298d73870e8aa2a0d5e77b8391f16fdfbbbe2", "platform": { "architecture": "s390x", "os": "linux" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2084, "digest": "sha256:07ebe243465ef4a667b78154ae6c3ea46fdb1582936aac3ac899ea311a701b40", "platform": { "architecture": "arm", "os": "linux", "variant": "armv7" } }, { "mediaType": "application/vnd.docker.distribution.manifest.v1+json", "size": 2090, "digest": "sha256:fb2fc0707b86dafa9959fe3d29e66af8787aee4d9a23581714be65db4265ad8a", "platform": { "architecture": "arm64", "os": "linux", "variant": "armv8" } Image Formats Index (Manifest List) linux amd64 linux ppc64le windows amd64 Manifests: Manifest linux arm64 Layers: Image Config: L0 L1 Ln Root Filesystem /usr /bin /dev /etc /home /lib C OCI Runtime Spec process args env cwd … root mounts Docker and OCI compatible OCI Image Spec containerd containerd
  • 10. Snapshotters How do you build a container root filesystem?
  • 11. Storage Architecture Snapshotter “layer snapshots” Content Store “content addressed blobs” Metadata Store “references” Runtime spec Rootfs (mounts)
  • 12. Snapshots type Snapshotter interface { Stat(key string) (Info, error) Mounts(key string) ([]containerd.Mount, error) Prepare(key, parent string) ([]containerd.Mount, error) View(key, parent string) ([]containerd.Mount, error) Commit(name, key string) error Remove(key string) error Walk(fn func(Info) error) error } type Info struct { Name string // name or key of snapshot Parent string Kind Kind } type Kind int const ( KindActive KindView KindCommitted )
  • 13. Active Committed Prepare(a, P0 ) Commit(P1 , a′) Snapshot Model P0a a′ b P1 P2 Commit(P2 , b) Remove(b) Prepare(b, P1 )
  • 14. Pulling an Image Data Flow Pull Fetch Content Images Snapshots Unpack Events Remote registry Mounts
  • 15. Demo
  • 16. API Client containerd Tasks and Runtime Runtimes Tasks Service Containers Service Meta Runtime Spec Mounts linux containerd-shim containerd-shim containerd-shim containerd-shim wcow hcsshim VM VM VM VM lcow VM VM hcsshim VM VM VM VM VM VM
  • 17. Starting a Container Images Snapshot Run Prepare Start Events Running Containers Containers Tasks Create
  • 18. Example: Pull an Image Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr pull docker.io/library/redis:alpine $ ctr image ls import ( "context" "github.com/containerd/containerd" "github.com/containerd/containerd/namespaces" ) // connect to our containerd daemon client, err := containerd.New("/run/containerd/containerd.sock") defer client.Close() // set our namespace to “example”: ctx := namespaces.WithNamespace(context.Background(), "example") // pull the alpine-based redis image from DockerHub: image, err := client.Pull(ctx, "docker.io/library/redis:alpine", containerd.WithPullUnpack)
  • 19. Example: Run a Container Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr run -t docker.io/library/redis:alpine redis-server $ ctr c ls // create our container metadata object and runtime config // allocate a new RW root filesystem for container based on the image container, err := client.NewContainer(ctx, "redis-server", containerd.WithNewSnapshot(“redis-rootfs”, image), containerd.WithNewSpec(oci.WithImageConfig(image)), ) defer container.Delete() // create a task from the container task, err := container.NewTask(ctx, containerd.Stdio) defer task.Delete(ctx) // make sure we wait before calling start exitStatusC, err := task.Wait(ctx) // call start on the task // starts the redis-server process in the container if err := task.Start(ctx); err != nil { return err }
  • 20. Example: Kill a Task Via ctr client: $ export CONTAINERD_NAMESPACE=example $ ctr t kill redis-server $ ctr t ls // make sure we wait before calling start exitStatusC, err := task.Wait(ctx) time.Sleep(3 * time.Second) if err := task.Kill(ctx, syscall.SIGTERM); err != nil { return err } // retrieve the process exit status from the channel status := <-exitStatusC code, exitedAt, err := status.Result() if err != nil { return err } // print out the exit code from the process fmt.Printf("redis-server exited with status: %dn", code)
  • 21. # HELP container_blkio_io_service_bytes_recursive_bytes The blkio io service bytes recursive # TYPE container_blkio_io_service_bytes_recursive_bytes gauge container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Async"} 1.07159552e+08 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Read"} 0 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Sync"} 81920 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Total"} 1.07241472e+08 container_blkio_io_service_bytes_recursive_bytes{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Write"} 1.07241472e+08 # HELP container_blkio_io_serviced_recursive_total The blkio io servied recursive # TYPE container_blkio_io_serviced_recursive_total gauge container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Async"} 892 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Read"} 0 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Sync"} 888 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Total"} 1780 container_blkio_io_serviced_recursive_total{container_id="foo4",device="/dev/nvme0n1",major="259",minor="0",namespace="default",op="Write"} 1780 # HELP container_cpu_kernel_nanoseconds The total kernel cpu time # TYPE container_cpu_kernel_nanoseconds gauge container_cpu_kernel_nanoseconds{container_id="foo4",namespace="default"} 2.6e+08 # HELP container_cpu_throttle_periods_total The total cpu throttle periods # TYPE container_cpu_throttle_periods_total gauge container_cpu_throttle_periods_total{container_id="foo4",namespace="default"} 0 # HELP container_cpu_throttled_periods_total The total cpu throttled periods # TYPE container_cpu_throttled_periods_total gauge container_cpu_throttled_periods_total{container_id="foo4",namespace="default"} 0 # HELP container_cpu_throttled_time_nanoseconds The total cpu throttled time # TYPE container_cpu_throttled_time_nanoseconds gauge container_cpu_throttled_time_nanoseconds{container_id="foo4",namespace="default"} 0 # HELP container_cpu_total_nanoseconds The total cpu time # TYPE container_cpu_total_nanoseconds gauge container_cpu_total_nanoseconds{container_id="foo4",namespace="default"} 1.003301578e+09 # HELP container_cpu_user_nanoseconds The total user cpu time # TYPE container_cpu_user_nanoseconds gauge container_cpu_user_nanoseconds{container_id="foo4",namespace="default"} 7e+08 # HELP container_hugetlb_failcnt_total The hugetlb failcnt # TYPE container_hugetlb_failcnt_total gauge container_hugetlb_failcnt_total{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_failcnt_total{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_hugetlb_max_bytes The hugetlb maximum usage # TYPE container_hugetlb_max_bytes gauge container_hugetlb_max_bytes{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_max_bytes{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_hugetlb_usage_bytes The hugetlb usage # TYPE container_hugetlb_usage_bytes gauge container_hugetlb_usage_bytes{container_id="foo4",namespace="default",page="1GB"} 0 container_hugetlb_usage_bytes{container_id="foo4",namespace="default",page="2MB"} 0 # HELP container_memory_active_anon_bytes The active_anon amount # TYPE container_memory_active_anon_bytes gauge container_memory_active_anon_bytes{container_id="foo4",namespace="default"} 2.658304e+06 # HELP container_memory_active_file_bytes The active_file amount # TYPE container_memory_active_file_bytes gauge container_memory_active_file_bytes{container_id="foo4",namespace="default"} 7.319552e+06 # HELP container_memory_cache_bytes The cache amount used # TYPE container_memory_cache_bytes gauge container_memory_cache_bytes{container_id="foo4",namespace="default"} 5.0597888e+07 # HELP container_memory_dirty_bytes The dirty amount Metrics
  • 22. Supported Components Component Status Stabilized Version Links GRPC API Stable 1.0 api/ Metrics API Stable 1.0 Go client API Unstable 1.1 tentative godoc ctr tool Unstable Out of scope -
  • 23. Support Horizon Release Status Start End of Life 0.0 End of Life Dec 4, 2015 - 0.1 End of Life Mar 21, 2016 - 0.2 End of Life Apr 21, 2016 Dec 5, 2017 1.0 Active Dec 5, 2017 max(Dec 5, 2018, release of 1.1.0) 1.1 Next TBD max(TBD+1 year, release of 1.2.0)
  • 25. Stress testing create/start/delete 678 containers in 60.144 seconds (11.273 c/sec) or (0.089 sec/c) failures=0
  • 28. Use cases - CURRENT - Docker (moby) - Kubernetes (cri-containerd) - LinuxKit - BuildKit - FUTURE/POTENTIAL - IBM Cloud/Bluemix - OpenFaaS - {your project here}
  • 29. Going further with containerd ▪ Contributing: Bug fixes, adding tests, improving docs, validation https://github.com/containerd/containerd ▪ Using: See the getting started documentation in the docs folder of the repo https://github.com/containerd/containerd/blob/master/docs/getting-started.md ▪ Porting/testing: Other architectures & OSs, stress testing (see bucketbench, containerd-stress): git clone <repo>, make binaries, sudo make install ▪ K8s CRI: incubation project to use containerd as CRI In beta today; e2e tests, validation, contributing
  • 30. Thank You! Questions? ▪ Jessica Valarezo ▫ https://github.com/jessvalarezo ▫ [email protected] ▫ Twitter: @jessvalarezo1