Podman service api exec to shell

Question

anyone can explain to me how to use : ContainerExecLibpod

According to document the api has :

AttachStderr
AttachStdin
AttachStdout

I want to know how to use that api parameters .
the podman api service started with this command :

> podman system service -t 0 tcp://localhost:9091

I create container :

> podman run -it --name=ubuntu -h ubuntu-container ubuntu:latest /bin/bash

now i test api with this command :

> curl -X POST 'http://localhost:9091/v5/libpod/containers/ubuntu/exec' -H "Content-Type: application/json" --data '{"AttachStderr": true,"AttachStdin": true,"AttachStdout": true,"Cmd" : ["ls"],"Tty": true}'
{"Id":"154a611f39691c7e76d1aceef28759c701ea0854422d07ff663f4f75faf7af44"}

the curl only result the simple json contain Id , how to use stdIn , stdOut , stdErr ?

mah454 · Accepted Answer · 2025-03-20 04:49:21Z

finally after two week found the solution.

Attach To Container

Create socket connection and send request like this :

> telnet localhot 9000
POST /v4.6.0/libpod/containers/busybox/attach?stream=true&stdout=true&stdin=true&stderr=true HTTP/1.1
Host: 127.0.0.1:9000
Upgrade: tcp
Connection: Upgrade

### Phase 1: PODMAN SERVER RESPONSE ###
HTTP/1.1 101 UPGRADED
Content-Type: tcp
Connection: Upgrade
Upgrade: application/vnd.docker.raw-stream

### Phase 2: INTERACTIVE SESSION ###
/ # ls
bin    etc    lib    proc   run    tmp    var
dev    home   lib64  root   sys    usr

Exec inside Container (Interactive Mode)

First create new exec instance :

curl -X POST 'http://localhost:9000/v5/libpod/containers/busybox/exec' -H "Content-Type: application/json" --data '{"AttachStderr": true,"AttachStdin": true,"AttachStdout": true,"Cmd" : ["/bin/sh"],"Tty": true}' -s | jq -r .Id

Now create socket connection :

POST /v5.0.0/libpod/exec/[paste id of exec instance]/start HTTP/1.1
Host: 127.0.0.1:9000
Content-Type: application/json
Content-Length: 46

{"Detach": false, "Tty": true, "h": 0, "w": 0}

### Phase 1: PODMAN SERVER RESPONSE ### 
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream

### Phase 2: INTERACTIVE SESSION ###
/ # ls
bin    etc    lib    proc   run    tmp    var
dev    home   lib64  root   sys    usr

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Podman service api exec to shell

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Attach To Container

Exec inside Container (Interactive Mode)

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Collectives™ on Stack Overflow

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Attach To Container

Exec inside Container (Interactive Mode)

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