docker REST API: logs: until=0 does not return any log

[gdesmott]

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

When fetching logs using Docker REST API with until=0 (the default), podman does not return any log while Docker returns them all.
I suppose Docker parses 0 as "no end" while podman uses it strictly.

Steps to reproduce the issue:

$ curl --unix-socket /var/run/user/$UID/podman/podman.sock -v \
  --output - \
  --header "Content-Type: application/json" \
  --header "Accept:" \
  --header "User-Agent:" \
  http://localhost/containers/$CONTAINER/logs?follow=true\&stdout=true\&until=0

Describe the results you received:

*   Trying /var/run/user/1000/podman/podman.sock:0...
* Connected to localhost (/run/user/1000/podman/podman.sock) port 80 (#0)
> GET /containers/test-container/logs?follow=true&stdout=true&until=0 HTTP/1.1
> Host: localhost
> Content-Type: application/json
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Api-Version: 1.40
< Libpod-Api-Version: 3.2.1
< Server: Libpod/3.2.1 (linux)
< Date: Mon, 05 Jul 2021 10:08:33 GMT
< Content-Length: 0
< 
* Connection #0 to host localhost left intact

Describe the results you expected:

Here is the result when running the same request on docker:

* Connected to localhost (/run/docker.sock) port 80 (#0)
> GET /containers/fc250e2baf6b/logs?follow=true\&stdout=true\&until=0 HTTP/1.1
> Host: localhost
> Content-Type: application/json
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Api-Version: 1.41
< Docker-Experimental: true
< Ostype: linux
< Server: Docker/20.10.5+dfsg1 (linux)
< Date: Mon, 05 Jul 2021 10:00:23 GMT
< Transfer-Encoding: chunked
< 
a/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
J/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
V/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
^10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
`10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
R/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
R/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
B/docker-entrypoint.sh: Configuration complete; ready for start up

Output of podman version:

podman version 3.2.1

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.21.0
  cgroupControllers: []
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.0.27-2.fc34.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.27, commit: '
  cpus: 8
  distribution:
    distribution: fedora
    version: "34"
  eventLogger: journald
  hostname: cass-t14
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 5.12.13-300.fc34.x86_64
  linkmode: dynamic
  memFree: 1743785984
  memTotal: 33274310656
  ociRuntime:
    name: crun
    package: crun-0.20.1-1.fc34.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.20.1
      commit: 0d42f1109fd73548f44b01b3e84d04a279e99d2e
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  remoteSocket:
    exists: true
    path: /run/user/1000/podman/podman.sock
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.9-1.fc34.x86_64
    version: |-
      slirp4netns version 1.1.8+dev
      commit: 6dc0186e020232ae1a6fcc1f7afbc3ea02fd3876
      libslirp: 4.4.0
      SLIRP_CONFIG_VERSION_MAX: 3
      libseccomp: 2.5.0
  swapFree: 25279586304
  swapTotal: 25295839232
  uptime: 118h 48m 41.44s (Approximately 4.92 days)
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
  - quay.io
store:
  configFile: /var/home/cassidy/.config/containers/storage.conf
  containerStore:
    number: 67
    paused: 0
    running: 5
    stopped: 62
  graphDriverName: overlay
  graphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-1.5.0-1.fc34.x86_64
      Version: |-
        fusermount3 version: 3.10.4
        fuse-overlayfs: version 1.5
        FUSE library version 3.10.4
        using FUSE kernel interface version 7.31
  graphRoot: /var/home/cassidy/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 107
  runRoot: /run/user/1000/containers
  volumePath: /var/home/cassidy/.local/share/containers/storage/volumes
version:
  APIVersion: 3.2.1
  Built: 1623697949
  BuiltTime: Mon Jun 14 21:12:29 2021
  GitCommit: ""
  GoVersion: go1.16.3
  OsArch: linux/amd64
  Version: 3.2.1

Package info (e.g. output of rpm -q podman or apt list podman):

 podman-3:3.2.1-1.fc34.x86_64

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide? (https://github.com/containers/podman/blob/master/troubleshooting.md)

No

[gdesmott]

Actually setting until with whatever value seems to always return an empty result.

[cdoern]

Looking into this, seems like until has some fixes that need to be added. Right now we parse until as a since but that doesn't seem to be accurate @gdesmott