20.3. Podman API를 수동으로 실행

프로세스

1. REST API에 대한 서비스를 실행합니다.

   # podman system service -t 0 --log-level=debug

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   • 값이 0이면 시간 초과가 없음을 의미합니다. rootful 서비스의 기본 끝점은 unix:/run/podman/podman.sock 입니다.
   • --log-level <level&gt; 옵션은 로깅 수준을 설정합니다. 표준 로깅 수준은 debug,info,warn,error,fatal, panic 입니다.

2. 다른 터미널에서 Podman의 시스템 정보를 표시합니다. podman-remote 명령은 일반 podman 명령과 달리 Podman 소켓을 통해 통신합니다.

   # podman-remote info

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3. Podman API의 문제를 해결하고 요청 및 응답을 표시하려면 curl 쉼표를 사용합니다. Linux 서버에서 Podman 설치에 대한 정보를 JSON 형식으로 가져오려면 다음을 수행합니다.

   # curl -s --unix-socket /run/podman/podman.sock http://d/v1.0.0/libpod/info | jq
       {
     "host": {
       "arch": "amd64",
       "buildahVersion": "1.15.0",
       "cgroupVersion": "v2",
       "conmon": {
         "package": "conmon-2.0.18-1.module+el8.3.0+7084+c16098dd.x86_64",
         "path": "/usr/bin/conmon",
         "version": "conmon version 2.0.18, commit: 7fd3f71a218f8d3a7202e464252aeb1e942d17eb"
       },
       …
     "version": {
       "APIVersion": 1,
       "Version": "2.0.0",
       "GoVersion": "go1.14.2",
       "GitCommit": "",
       "BuiltTime": "Thu Jan  1 01:00:00 1970",
       "Built": 0,
       "OsArch": "linux/amd64"
     }
   }

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   jq 유틸리티는 명령줄 JSON 프로세서입니다.

4. registry.access.redhat.com/ubi8/ubi 컨테이너 이미지를 가져옵니다.

   # curl -XPOST --unix-socket /run/podman/podman.sock -v 'http://d/v1.0.0/images/create?fromImage=registry.access.redhat.com%2Fubi8%2Fubi'
   *   Trying /run/podman/podman.sock...
   * Connected to d (/run/podman/podman.sock) port 80 (#0)
   > POST /v1.0.0/images/create?fromImage=registry.access.redhat.com%2Fubi8%2Fubi HTTP/1.1
   > Host: d
   > User-Agent: curl/7.61.1
   > Accept: /
   >
   < HTTP/1.1 200 OK
   < Content-Type: application/json
   < Date: Tue, 20 Oct 2020 13:58:37 GMT
   < Content-Length: 231
   <
   {"status":"pulling image () from registry.access.redhat.com/ubi8/ubi:latest, registry.redhat.io/ubi8/ubi:latest","error":"","progress":"","progressDetail":{},"id":"ecbc6f53bba0d1923ca9e92b3f747da8353a070fccbae93625bd8b47dbee772e"}
   * Connection #0 to host d left intact

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5. 가져온 이미지를 표시합니다.

   # curl --unix-socket /run/podman/podman.sock -v 'http://d/v1.0.0/libpod/images/json' | jq
   *   Trying /run/podman/podman.sock...
     % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                    Dload  Upload   Total   Spent    Left  Speed
     0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* Connected to d (/run/podman/podman.sock) port 80 (0) > GET /v1.0.0/libpod/images/json HTTP/1.1 > Host: d > User-Agent: curl/7.61.1 > Accept: / > < HTTP/1.1 200 OK < Content-Type: application/json < Date: Tue, 20 Oct 2020 13:59:55 GMT < Transfer-Encoding: chunked < { [12498 bytes data] 100 12485 0 12485 0 0 2032k 0 --:--:-- --:--:-- --:--:-- 2438k * Connection #0 to host d left intact [ { "Id": "ecbc6f53bba0d1923ca9e92b3f747da8353a070fccbae93625bd8b47dbee772e", "RepoTags": [ "registry.access.redhat.com/ubi8/ubi:latest", "registry.redhat.io/ubi8/ubi:latest" ], "Created": "2020-09-01T19:44:12.470032Z", "Size": 210838671, "Labels": { "architecture": "x86_64", "build-date": "2020-09-01T19:43:46.041620", "com.redhat.build-host": "cpt-1008.osbs.prod.upshift.rdu2.redhat.com", ... "maintainer": "Red Hat, Inc.", "name": "ubi8", ... "summary": "Provides the latest release of Red Hat Universal Base Image 8.", "url": "https://access.redhat.com/containers/0) > GET /v1.0.0/libpod/images/json HTTP/1.1 > Host: d > User-Agent: curl/7.61.1 > Accept: / > < HTTP/1.1 200 OK < Content-Type: application/json < Date: Tue, 20 Oct 2020 13:59:55 GMT < Transfer-Encoding: chunked < { [12498 bytes data] 100 12485 0 12485 0 0 2032k 0 --:--:-- --:--:-- --:--:-- 2438k * Connection #0 to host d left intact [ { "Id": "ecbc6f53bba0d1923ca9e92b3f747da8353a070fccbae93625bd8b47dbee772e", "RepoTags": [ "registry.access.redhat.com/ubi8/ubi:latest", "registry.redhat.io/ubi8/ubi:latest" ], "Created": "2020-09-01T19:44:12.470032Z", "Size": 210838671, "Labels": { "architecture": "x86_64", "build-date": "2020-09-01T19:43:46.041620", "com.redhat.build-host": "cpt-1008.osbs.prod.upshift.rdu2.redhat.com", ... "maintainer": "Red Hat, Inc.", "name": "ubi8", ... "summary": "Provides the latest release of Red Hat Universal Base Image 8.", "url": "https://access.redhat.com/containers/0) > GET /v1.0.0/libpod/images/json HTTP/1.1 > Host: d > User-Agent: curl/7.61.1 > Accept: / > < HTTP/1.1 200 OK < Content-Type: application/json < Date: Tue, 20 Oct 2020 13:59:55 GMT < Transfer-Encoding: chunked < { [12498 bytes data] 100 12485 0 12485 0 0 2032k 0 --:--:-- --:--:-- --:--:-- 2438k * Connection #0 to host d left intact [ { "Id": "ecbc6f53bba0d1923ca9e92b3f747da8353a070fccbae93625bd8b47dbee772e", "RepoTags": [ "registry.access.redhat.com/ubi8/ubi:latest", "registry.redhat.io/ubi8/ubi:latest" ], "Created": "2020-09-01T19:44:12.470032Z", "Size": 210838671, "Labels": { "architecture": "x86_64", "build-date": "2020-09-01T19:43:46.041620", "com.redhat.build-host": "cpt-1008.osbs.prod.upshift.rdu2.redhat.com", ... "maintainer": "Red Hat, Inc.", "name": "ubi8", ... "summary": "Provides the latest release of Red Hat Universal Base Image 8.", "url": "https://access.redhat.com/containers//registry.access.redhat.com/ubi8/images/8.2-347",
         ...
       },
       "Names": [
         "registry.access.redhat.com/ubi8/ubi:latest",
         "registry.redhat.io/ubi8/ubi:latest"
       ],
       ...
       ]
     }
   ]

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