ctr

containerd의 CLI

ctr [global options]<color> <color #ff7f27>command [command options] [arguments]
global options
- –address, -a container sockert (default: /urn/containerd/containrd.sock)
- –namespace namespace, -n namespace namespace(default: default)
- –debug

k8s는 k8s.io네임스페이스, docker는 moby

ctr namespace ls 네임스페이스 목록
ctr namespace create name
ctr namespace rm name

ctr image pull image 이미지 pull
- –platform</clolor> linux/amd64 * <color #c3c3c3>ctr image ls 이미지 목록
ctr image rm image 이미지 삭제
ctr image tag src dst 태그
ctr image export file.tar image 내보내기
ctr image import file.tar 가져오기
ctr image check 이미지 레이어 무결성 확인
ctr image mount image mountpoint 이미지 마운트
ctr image unmount mountpoint

ctr container create \
  --env KEY=VALUE \
  --mount type=bind,src=/host,dst=/container,options=rbind:rw \
  --net-host \
  <image> <id>

ctr container create image id 컨테이너 생성
ctr container ls 목록
ctr container info id 상세정보 JSON
ctr container rm id 삭제

실제 프로세스 실행단위

* ctr task start id task 시작

–detach, -d
ctr task ls 실행중인 task 목록
ctr task exec eid id cmd 실행 tty |
ctr task exec sh1 -t id sh tty attach
ctr task attach id stdout/stderr attach
ctr task pause id
ctr task resume id
ctr task kill id
–signal SIGKILL
ctr task rm id task 제거(stop)
ctr task ps id task 내 프로세스 목록

ctr run -d \
  --env KEY=VAL \
  --mount type=bind,src=/data,dst=/data,options=rbind:rw \
  <image> <id> <cmd>

create + start

* ctr run image id forground

–detach, -d
–net-host
–rm 실행 후 작동 삭제

레이어 관리

* ctr snapshot ls forground

ctr snpashot info key forground
ctr snapshot rm key forground
ctr snapshot tree forground

content

blob 관리

* ctr content ls forground

ctr content get digest
ctr content delete digest

ctr leases ls
ctr leases create –id id
ctr leases delete id

ctr plugin ls 로드된 플러그인 목록

ctr --help

NAME:
   ctr - 
                 __
           _____/ /______
          / ___/ __/ ___/
         / /__/ /_/ /
         \___/\__/_/

         containerd CLI


USAGE:
   ctr [global options] command [command options]

VERSION:
   2.2.0

DESCRIPTION:
   
   ctr is an unsupported debug and administrative client for interacting
   with the containerd daemon. Because it is unsupported, the commands,
   options, and operations are not guaranteed to be backward compatible or
   stable from release to release of the containerd project.

COMMANDS:
   plugins, plugin            Provides information about containerd plugins
   version                    Print the client and server versions
   containers, c, container   Manage containers
   content                    Manage content
   events, event              Display containerd events
   images, image, i           Manage images
   leases                     Manage leases
   namespaces, namespace, ns  Manage namespaces
   pprof                      Provide golang pprof outputs for containerd
   run                        Run a container
   snapshots, snapshot        Manage snapshots
   tasks, t, task             Manage tasks
   install                    Install a new package
   oci                        OCI tools
   sandboxes, sandbox, sb, s  Manage sandboxes
   info                       Print the server info
   deprecations               
   shim                       Interact with a shim directly
   help, h                    Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --debug                      Enable debug output in logs (default: false)
   --address value, -a value    Address for containerd's GRPC server (default: "/run/containerd/containerd.sock") [$CONTAINERD_ADDRESS]
   --timeout value              Total timeout for ctr commands (default: 0s)
   --connect-timeout value      Timeout for connecting to containerd (default: 0s)
   --namespace value, -n value  Namespace to use with commands (default: "default") [$CONTAINERD_NAMESPACE]
   --help, -h                   Show help (default: false)
   --version, -v                Print the version (default: false)

ctr

USAGE

namespace

images

container

task

run

snapshot

content

lease

plugin

HELP

Command Line Interface Helper