There is no option to set ulimit while using podman kube play #16404

paul-grozav · 2022-11-04T07:52:27Z

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

/kind feature

Description

I would like to revive this issue from the redhat bugzilla tracker: https://bugzilla.redhat.com/show_bug.cgi?id=1950183 . I'm facing a similar issue.

This is my context (machine setup) - And to be honest, it'll be hard to upgrade the entire OS just for a patch on podman(but that's another story) - I hope that at least this will be fixed in a latest version for newer environments:

$ cat /etc/os-release 
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

$ cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core) 

$ uname -a
Linux my-server 3.10.0-1160.76.1.el7.x86_64 #1 SMP Wed Aug 10 16:21:17 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

$ id # I'm running in rootless mode for security reasons
uid=2115(dbadmin) gid=588(dba) groups=588(dba)

This is my problem. The ulimits are not exported - I understand that podman doesn't want to introduce support for anything that is not in the k8s standard specs. But there is also no other way to apply ulimits to containers created through kube play. A command line parameter would be nice, or any option, really.

$ podman run -d --name=ulimit_test --ulimit nofile=1231:3123 alpine:3.16.2 sleep infinity
30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33

$ podman exec -it ulimit_test /bin/sh -c "ulimit -Sn ; ulimit -Hn"
1231
3123

$ podman inspect ulimit_test
[
    {
        "Id": "30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33",
        "Created": "2022-11-04T02:20:06.488409531-05:00",
        "Path": "sleep",
        "Args": [
            "infinity"
        ],
        "State": {
            "OciVersion": "1.0.1-dev",
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 9025,
            "ConmonPid": 9009,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2022-11-04T02:20:06.718683968-05:00",
            "FinishedAt": "0001-01-01T00:00:00Z",
            "Healthcheck": {
                "Status": "",
                "FailingStreak": 0,
                "Log": null
            }
        },
        "Image": "9c6f0724472873bb50a2ae67a9e7adcb57673a183cea8b06eb778dca859181b5",
        "ImageName": "docker.io/library/alpine:3.16.2",
        "Rootfs": "",
        "Pod": "",
        "ResolvConfPath": "/run/user/2115/containers/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/resolv.conf",
        "HostnamePath": "/run/user/2115/containers/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/hostname",
        "HostsPath": "/run/user/2115/containers/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/hosts",
        "StaticDir": "/home/dbadmin/.local/share/containers/storage/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata",
        "OCIConfigPath": "/home/dbadmin/.local/share/containers/storage/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/config.json",
        "OCIRuntime": "runc",
        "LogPath": "/home/dbadmin/.local/share/containers/storage/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/ctr.log",
        "ConmonPidFile": "/run/user/2115/containers/overlay-containers/30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33/userdata/conmon.pid",
        "Name": "ulimit_test",
        "RestartCount": 0,
        "Driver": "overlay",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "EffectiveCaps": [
            "CAP_CHOWN",
            "CAP_DAC_OVERRIDE",
            "CAP_FSETID",
            "CAP_FOWNER",
            "CAP_MKNOD",
            "CAP_NET_RAW",
            "CAP_SETGID",
            "CAP_SETUID",
            "CAP_SETFCAP",
            "CAP_SETPCAP",
            "CAP_NET_BIND_SERVICE",
            "CAP_SYS_CHROOT",
            "CAP_KILL",
            "CAP_AUDIT_WRITE"
        ],
        "BoundingCaps": [
            "CAP_CHOWN",
            "CAP_DAC_OVERRIDE",
            "CAP_FSETID",
            "CAP_FOWNER",
            "CAP_MKNOD",
            "CAP_NET_RAW",
            "CAP_SETGID",
            "CAP_SETUID",
            "CAP_SETFCAP",
            "CAP_SETPCAP",
            "CAP_NET_BIND_SERVICE",
            "CAP_SYS_CHROOT",
            "CAP_KILL",
            "CAP_AUDIT_WRITE"
        ],
        "ExecIDs": [],
        "GraphDriver": {
            "Name": "overlay",
            "Data": {
                "LowerDir": "/home/dbadmin/.local/share/containers/storage/overlay/994393dc58e7931862558d06e46aa2bb17487044f670f310dffe1d24e4d1eec7/diff",
                "MergedDir": "/home/dbadmin/.local/share/containers/storage/overlay/11ca8c39f53a25a9dfa69cbd0a5921e640bba2f70aa3d7460ce926b972568403/merged",
                "UpperDir": "/home/dbadmin/.local/share/containers/storage/overlay/11ca8c39f53a25a9dfa69cbd0a5921e640bba2f70aa3d7460ce926b972568403/diff",
                "WorkDir": "/home/dbadmin/.local/share/containers/storage/overlay/11ca8c39f53a25a9dfa69cbd0a5921e640bba2f70aa3d7460ce926b972568403/work"
            }
        },
        "Mounts": [],
        "Dependencies": [],
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": [],
            "SandboxKey": "",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",        
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,           
            "IPAddress": "",                     
            "IPPrefixLen": 0,                                      
            "IPv6Gateway": "",                              
            "MacAddress": ""                               
        },                                                  
        "ExitCommand": [                              
            "/usr/bin/podman",                       
            "--root",                                 
            "/home/dbadmin/.local/share/containers/storage",     
            "--runroot",                             
            "/run/user/2115/containers",               
            "--log-level",                           
            "error",                               
            "--cgroup-manager",                   
            "cgroupfs",                               
            "--tmpdir",                             
            "/run/user/2115/libpod/tmp",
            "--runtime",
            "runc",                             
            "--storage-driver",                  
            "overlay",                                      
            "--storage-opt",                               
            "overlay.mount_program=/usr/bin/fuse-overlayfs",
            "--events-backend",                       
            "file",                                  
            "container",                              
            "cleanup",                               
            "30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33"
        ],                                           
        "Namespace": "",                           
        "IsInfra": false,                                                                                           
        "Config": {                                        
            "Hostname": "30951028ad3f",
            "Domainname": "",                      
            "User": "",
            "AttachStdin": false,                                                                                    
            "AttachStdout": false,                        
            "AttachStderr": false,
            "Tty": false,                         
            "OpenStdin": false,                                                                                                                                                                                                                
            "StdinOnce": false,                  
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",                                 
                "TERM=xterm",                                   
                "HOSTNAME=30951028ad3f",
                "container=podman",
                "HOME=/root"              
            ],                                                                                                             
            "Cmd": [                                                                                                             
                "sleep",                                                                                                          
                "infinity"                        
            ],                                                  
            "Image": "docker.io/library/alpine:3.16.2",
            "Volumes": null,
            "WorkingDir": "/",
            "Entrypoint": "",                                                    
            "OnBuild": null,                             
            "Labels": null,
            "Annotations": {
                "io.container.manager": "libpod",
                "io.kubernetes.cri-o.ContainerType": "sandbox",
                "io.kubernetes.cri-o.Created": "2022-11-04T02:20:06.488409531-05:00",
                "io.kubernetes.cri-o.TTY": "false",
                "io.podman.annotations.autoremove": "FALSE",
                "io.podman.annotations.init": "FALSE",
                "io.podman.annotations.privileged": "FALSE",
                "io.podman.annotations.publish-all": "FALSE",
                "org.opencontainers.image.stopSignal": "15"
            },            
            "StopSignal": 15
        },                    
        "HostConfig": {   
            "Binds": [],
            "ContainerIDFile": "",                             
            "LogConfig": {                       
                "Type": "k8s-file",
                "Config": null
            },                     
            "NetworkMode": "default",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "",                                                         
                "MaximumRetryCount": 0                 
            },       
            "AutoRemove": false,
            "VolumeDriver": "",                                                                                                                                
            "VolumesFrom": null,                                                                                                                          
            "CapAdd": [],                                                                                                                           
            "CapDrop": [],                                                                                                                                        
            "Dns": [],                                                                                                                                                            
            "DnsOptions": [],
            "DnsSearch": [],                                                                                                                                            
            "ExtraHosts": [],                                                                                                                                
            "GroupAdd": [],   
            "IpcMode": "",
            "Cgroup": "",   
            "Cgroups": "default",
            "Links": null, 
            "OomScoreAdj": 0, 
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": [],
            "Tmpfs": {},
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 65536000,
            "Runtime": "oci",
            "ConsoleSize": [
                0,                 
                0            
            ],         
            "Isolation": "", 
            "CpuShares": 0,
            "Memory": 0, 
            "NanoCpus": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": null,
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": 0,                                                                                                                        
            "OomKillDisable": false,                                                                                                                         
            "PidsLimit": 0,                                                                                                                               
            "Ulimits": [                                                                                                                                
                {
                    "Name": "RLIMIT_NOFILE",
                    "Soft": 1231,
                    "Hard": 3123
                }           
            ],           
            "CpuCount": 0,  
            "CpuPercent": 0,     
            "IOMaximumIOps": 0,        
            "IOMaximumBandwidth": 0     
        }               
    }                        
]                                        

$ podman generate kube -s ulimit_test -f ulimit_test.yml
$ cat ulimit_test.yml 
# Generation of Kubernetes YAML is still under development!
#
# Save the output of this file and use kubectl create -f to import
# it into Kubernetes.
#
# Created with podman-1.6.4
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2022-11-04T07:25:29Z"
  labels:
    app: ulimittest
  name: ulimittest
spec:
  containers:
  - command:
    - sleep
    - infinity
    env:
    - name: PATH
      value: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
    - name: TERM
      value: xterm
    - name: HOSTNAME
    - name: container
      value: podman
    image: docker.io/library/alpine:3.16.2
    name: ulimittest
    resources: {}
    securityContext:
      allowPrivilegeEscalation: true
      capabilities: {}
      privileged: false
      readOnlyRootFilesystem: false
    workingDir: /
status: {}
---
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: "2022-11-04T07:25:29Z"
  labels:
    app: ulimittest
  name: ulimittest
spec:
  selector:
    app: ulimittest
  type: NodePort
status:
  loadBalancer: {}

$ podman stop -t0 ulimit_test
30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33

$ podman rm ulimit_test
30951028ad3fd487831e0ee23231b362b31e3c09e8293e03d91d6a9fda7c6d33

$ podman play kube ulimit_test.yml 
a container exists with the same name (ulimittest) as the pod in your YAML file; changing pod name to ulimittest_pod
Pod:
52348a2fe515f336943c9b3c2adbc7847c657a859b5dfedd21fbf2a2195cdaa5
Container:
15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3

$ podman ps -a
CONTAINER ID  IMAGE                            COMMAND         CREATED         STATUS                       PORTS  NAMES
15089f7a4707  docker.io/library/alpine:3.16.2  sleep infinity  19 seconds ago  Up 19 seconds ago                   ulimittest
b1026979e90f  k8s.gcr.io/pause:3.1                             19 seconds ago  Up 19 seconds ago                   52348a2fe515-infra

$ podman exec -it ulimittest /bin/sh -c "ulimit -Sn ; ulimit -Hn"
1024
1024

$ podman inspect ulimittest
[
    {
        "Id": "15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3",
        "Created": "2022-11-04T02:27:02.895147872-05:00",
        "Path": "sleep",
        "Args": [
            "infinity"
        ],
        "State": {
            "OciVersion": "1.0.1-dev",
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 13400,
            "ConmonPid": 13388,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2022-11-04T02:27:03.235785686-05:00",
            "FinishedAt": "0001-01-01T00:00:00Z",
            "Healthcheck": {
                "Status": "",
                "FailingStreak": 0,
                "Log": null
            }
        },
        "Image": "9c6f0724472873bb50a2ae67a9e7adcb57673a183cea8b06eb778dca859181b5",
        "ImageName": "docker.io/library/alpine:3.16.2",
        "Rootfs": "",
        "Pod": "52348a2fe515f336943c9b3c2adbc7847c657a859b5dfedd21fbf2a2195cdaa5",
        "ResolvConfPath": "/run/user/2115/containers/overlay-containers/b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e/userdata/resolv.conf",
        "HostnamePath": "/run/user/2115/containers/overlay-containers/15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3/userdata/hostname",
        "HostsPath": "/run/user/2115/containers/overlay-containers/b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e/userdata/hosts",
        "StaticDir": "/home/dbadmin/.local/share/containers/storage/overlay-containers/15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3/userdata",
        "OCIConfigPath": "/home/dbadmin/.local/share/containers/storage/overlay-containers/15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3/userdata/config.json",
        "OCIRuntime": "runc",
        "LogPath": "/home/dbadmin/.local/share/containers/storage/overlay-containers/15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3/userdata/ctr.log",
        "ConmonPidFile": "/run/user/2115/containers/overlay-containers/15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3/userdata/conmon.pid",
        "Name": "ulimittest",
        "RestartCount": 0,
        "Driver": "overlay",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "EffectiveCaps": [
            "CAP_CHOWN",
            "CAP_DAC_OVERRIDE",
            "CAP_FSETID",
            "CAP_FOWNER",
            "CAP_MKNOD",
            "CAP_NET_RAW",
            "CAP_SETGID",
            "CAP_SETUID",
            "CAP_SETFCAP",
            "CAP_SETPCAP",
            "CAP_NET_BIND_SERVICE",
            "CAP_SYS_CHROOT",
            "CAP_KILL",
            "CAP_AUDIT_WRITE"
        ],
        "BoundingCaps": [
            "CAP_CHOWN",
            "CAP_DAC_OVERRIDE",
            "CAP_FSETID",
            "CAP_FOWNER",
            "CAP_MKNOD",
            "CAP_NET_RAW",
            "CAP_SETGID",
            "CAP_SETUID",
            "CAP_SETFCAP",
            "CAP_SETPCAP",
            "CAP_NET_BIND_SERVICE",
            "CAP_SYS_CHROOT",
            "CAP_KILL",
            "CAP_AUDIT_WRITE"
        ],
        "ExecIDs": [],
        "GraphDriver": {
            "Name": "overlay",
            "Data": {
                "LowerDir": "/home/dbadmin/.local/share/containers/storage/overlay/994393dc58e7931862558d06e46aa2bb17487044f670f310dffe1d24e4d1eec7/diff",
                "MergedDir": "/home/dbadmin/.local/share/containers/storage/overlay/1006e6f0e1941f786a84cd7c2d92a1840e768f2b040a466dceaa02c9df008c1b/merged",
                "UpperDir": "/home/dbadmin/.local/share/containers/storage/overlay/1006e6f0e1941f786a84cd7c2d92a1840e768f2b040a466dceaa02c9df008c1b/diff",
                "WorkDir": "/home/dbadmin/.local/share/containers/storage/overlay/1006e6f0e1941f786a84cd7c2d92a1840e768f2b040a466dceaa02c9df008c1b/work"
            }
        },
        "Mounts": [],
        "Dependencies": [
            "b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e"
        ],
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": [],
            "SandboxKey": "",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,                                    
            "IPAddress": "",
            "IPPrefixLen": 0,
            "IPv6Gateway": "",
            "MacAddress": ""
        },         
        "ExitCommand": [                  
            "/usr/bin/podman",
            "--root",
            "/home/dbadmin/.local/share/containers/storage",
            "--runroot",            
            "/run/user/2115/containers",
            "--log-level",
            "error",               
            "--cgroup-manager",
            "cgroupfs",
            "--tmpdir",
            "/run/user/2115/libpod/tmp",
            "--runtime",
            "runc",
            "--storage-driver",            
            "overlay",
            "--storage-opt",
            "overlay.mount_program=/usr/bin/fuse-overlayfs",
            "--events-backend",
            "file",
            "container",
            "cleanup",
            "15089f7a4707d33b357b30319a1f22ec0a1f5545278b694b216198742fbeccb3"
        ],        
        "Namespace": "",                               
        "IsInfra": false,                                       
        "Config": {                                          
            "Hostname": "ulimittest_pod",                                                                           
            "Domainname": "",
            "User": "",                                         
            "AttachStdin": false,
            "AttachStdout": false,                              
            "AttachStderr": false,     
            "Tty": false,                
            "OpenStdin": false,          
            "StdinOnce": false,           
            "Env": [                                                                                                    
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",                                         
                "TERM=xterm",                                                                                                        
                "HOSTNAME=ulimittest_pod",                                                                                    
                "container=podman",              
                "HOME=/root"                                    
            ],                                                                             
            "Cmd": [
                "sleep",
                "infinity"                           
            ],
            "Image": "docker.io/library/alpine:3.16.2",
            "Volumes": null,                                                     
            "WorkingDir": "/",                           
            "Entrypoint": "",
            "OnBuild": null,
            "Labels": null,
            "Annotations": {
                "io.container.manager": "libpod",
                "io.kubernetes.cri-o.Created": "2022-11-04T02:27:02.895147872-05:00",
                "io.podman.annotations.autoremove": "FALSE",
                "io.podman.annotations.init": "FALSE",
                "io.podman.annotations.privileged": "FALSE",
                "io.podman.annotations.publish-all": "FALSE",
                "org.opencontainers.image.stopSignal": "15"
            },            
            "StopSignal": 15
        },                     
        "HostConfig": {   
            "Binds": [],
            "ContainerIDFile": "",                             
            "LogConfig": {                       
                "Type": "", 
                "Config": null
            },                     
            "NetworkMode": "container:b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "",                                                         
                "MaximumRetryCount": 0                 
            },       
            "AutoRemove": false,                                                  
            "VolumeDriver": "",                                                                                                                                
            "VolumesFrom": null,                                                                                                                          
            "CapAdd": [],                                                                                                                           
            "CapDrop": [],                                                                                                                                        
            "Dns": [],                                                                                                                                                            
            "DnsOptions": [],
            "DnsSearch": [],                                                                                                                                            
            "ExtraHosts": [],                                                                                                                                
            "GroupAdd": [],  
            "IpcMode": "container:b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e",
            "Cgroup": "",   
            "Cgroups": "default",
            "Links": null, 
            "OomScoreAdj": 0, 
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": [],
            "Tmpfs": {},
            "UTSMode": "container:b1026979e90fbe304ff75526b9ecad1a5c8999ad73b43d0cc3422e4a523aa73e",
            "UsernsMode": "",
            "ShmSize": 0,
            "Runtime": "oci",
            "ConsoleSize": [
                0,                 
                0            
            ],         
            "Isolation": "", 
            "CpuShares": 0,
            "Memory": 0, 
            "NanoCpus": 0,
            "CgroupParent": "/libpod_parent/52348a2fe515f336943c9b3c2adbc7847c657a859b5dfedd21fbf2a2195cdaa5",
            "BlkioWeight": 0,
            "BlkioWeightDevice": null,
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": 0,                                                                                                                        
            "OomKillDisable": false,                                                                                                                         
            "PidsLimit": 0,                                                                                                                               
            "Ulimits": [                                                                                                                                
                {
                    "Name": "RLIMIT_NOFILE",
                    "Soft": 1024,
                    "Hard": 1024
                }                                                             
            ],
            "CpuCount": 0,  
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0
        }                              
    }                                   
]

Steps to reproduce the issue:

podman run -d --name=ulimit_test --ulimit nofile=1231:3123 alpine:3.16.2 sleep infinity
podman exec -it ulimit_test /bin/sh -c "ulimit -Sn ; ulimit -Hn" observe values 1231 and 3123
podman generate kube -s ulimit_test -f ulimit_test.yml
podman stop -t0 ulimit_test && podman rm ulimit_test
podman play kube ulimit_test.yml
podman exec -it ulimittest /bin/sh -c "ulimit -Sn ; ulimit -Hn" observe different values than before

Describe the results you received:
After exporting and re-importing the container, the ulimits are different. 1231:3123 versus 1024:1024

Describe the results you expected:
I was hoping to be able to keep the original ulimits, even though the container definition was exported and re-imported. Or at least have an option that would allow me to set ulimits at play time, appending the --ulimit flag to podman, besides what's in the yml definition file.

Additional information you deem important (e.g. issue happens only occasionally):

Output of podman version:

Version:            1.6.4
RemoteAPI Version:  1
Go Version:         go1.12.12
OS/Arch:            linux/amd64

Output of podman info:

host:
  BuildahVersion: 1.11.7
  CgroupVersion: v1
  Conmon:
    package: conmon-2.0.8-1.el7.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.8, commit: f85c8b1ce77b73bcd48b2d802396321217008762'
  Distribution:
    distribution: '"centos"'
    version: "7"
  IDMappings:
    gidmap:
    - container_id: 0
      host_id: 588
      size: 1
    - container_id: 1
      host_id: 231072
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 2115
      size: 1
    - container_id: 1
      host_id: 231072
      size: 65536
  MemFree: 11418755072
  MemTotal: 67333496832
  OCIRuntime:
    name: runc
    package: containerd.io-1.4.3-3.1.el7.x86_64
    path: /usr/bin/runc
    version: |-
      runc version 1.0.0-rc92
      commit: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
      spec: 1.0.2-dev
  SwapFree: 2072748032
  SwapTotal: 2683281408
  arch: amd64
  cpus: 8
  eventlogger: file
  hostname: my-server
  kernel: 3.10.0-1160.76.1.el7.x86_64
  os: linux
  rootless: true
  slirp4netns:
    Executable: /usr/bin/slirp4netns
    Package: slirp4netns-0.4.3-4.el7_8.x86_64
    Version: |-
      slirp4netns version 0.4.3
      commit: 2244b9b6461afeccad1678fac3d6e478c28b4ad6
  uptime: 151h 32m 20.04s (Approximately 6.29 days)
registries:
  blocked: null
  insecure: null
  search:
  - registry.access.redhat.com
  - registry.redhat.io
  - docker.io
store:
  ConfigFile: /home/dbadmin/.config/containers/storage.conf
  ContainerStore:
    number: 2
  GraphDriverName: overlay
  GraphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
      Version: |-
        fuse-overlayfs: version 0.7.2
        FUSE library version 3.6.1
        using FUSE kernel interface version 7.29
  GraphRoot: /home/dbadmin/.local/share/containers/storage
  GraphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  ImageStore:
    number: 5
  RunRoot: /run/user/2115/containers
  VolumePath: /home/dbadmin/.local/share/containers/storage/volumes

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

podman-1.6.4-36.el7_9.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/main/troubleshooting.md)

No

I've only checked https://docs.podman.io/en/latest/markdown/podman-kube-play.1.html and couldn't see an option/support for ulimits.

Additional environment details (AWS, VirtualBox, physical, etc.):
Physical machine, environment details are above.

Thank you ! You're doing an awesome job !

The text was updated successfully, but these errors were encountered:

vrothberg · 2022-11-04T08:40:02Z

Thanks for reaching out!

This is working in more recent versions of Podman:

~ $ podman container create --name test --memory 10MB --ulimit "nofile=65535:65535"  alpine
0189f17560ff9271caad8f71d93297b59d1331912c966807d093c25ee61d25d6
~ $ podman generate kube test
# Save the output of this file and use kubectl create -f to import
# it into Kubernetes.
#
# Created with podman-4.3.0-rc1
apiVersion: v1
kind: Pod
metadata:
  annotations:
    io.kubernetes.cri-o.TTY/test: "false"
    io.podman.annotations.autoremove/test: "FALSE"
    io.podman.annotations.init/test: "FALSE"
    io.podman.annotations.privileged/test: "FALSE"
    io.podman.annotations.publish-all/test: "FALSE"
  creationTimestamp: "2022-11-04T08:38:28Z"
  labels:
    app: test-pod
  name: test-pod
spec:
  automountServiceAccountToken: false
  containers:
  - image: docker.io/library/alpine:latest
    name: test
    resources:
      limits:
        memory: 10Mi
    securityContext:
      capabilities:
        drop:
        - CAP_MKNOD
        - CAP_NET_RAW
        - CAP_AUDIT_WRITE

See the memory: 10Mi?

vrothberg · 2022-11-04T08:41:18Z

Ah, apologies, the ulimits are not added yet.

paul-grozav · 2022-11-04T09:30:44Z

Ah, apologies, the ulimits are not added yet.

Oh, thanks for confirming this, I didn't test with version 4.3.0-rc1

rhatdan · 2022-11-04T11:20:13Z

Interested in opening a PR?

rhatdan · 2022-11-04T19:25:39Z

Can you specify a ulimit within a kubernetes.yaml file?

rhatdan · 2022-11-04T19:30:25Z

Perhaps the solution would be for us to add --ulimit to podman kube play command?

rhatdan · 2022-11-04T19:31:16Z

podman pod create should probably have a ulimit as well.

rhatdan · 2022-11-04T19:31:25Z

@cdoern PTAL

paul-grozav · 2022-11-05T15:07:01Z

@rhatdan

Q1: Interested in opening a PR?
A1: If that was intended for me, I don't have much experience in Go, it might take longer than it would take you - but that doesn't mean I shouldn't try - I'll get back with a pull-request if this is not fixed in the meantime :)

Q2: Can you specify a ulimit within a kubernetes.yaml file?
A2: It seems no, you pointed to this, kubernetes/kubernetes#3595 , and it seems it's still not implemented almost 8 years later.

Q3: Perhaps the solution would be for us to add --ulimit to podman kube play command?
A3: That's what I was thinking too, maybe something like: podman play kube --ulimit pod_name.container_name.ulimit_type=soft_value:hard_value ulimit_test.yml example: podman play kube --ulimit db.maria.nofile=1231:3123 ulimit_test.yml Or maybe that's too obfuscated, what ever you think is best will be better than no option :)

rhatdan · 2022-11-07T12:45:00Z

@cdoern or @umohnani8 Care to take a stab at Option 3?

cdoern · 2022-11-07T12:47:47Z

Sure @rhatdan I'll try it this week

fpoirotte · 2022-12-06T15:06:23Z

Another option would be to use annotations to define the intended limits.
This way, the limits will be exported automatically when podman generate kube is invoked.
What do you think?

paul-grozav · 2022-12-07T11:39:53Z

@fpoirotte , But that would only export/import the annotation, which can express the intention, but will not actually change container's limit, right? so I don't see how it would help

fpoirotte · 2022-12-07T13:27:49Z

podman could parse the annotations when reading the manifest in podman play kube and convert them to the proper internal representation of ulimits.

This would allow for self-contained manifests (instead of having part of the configuration in the manifest, and the rest as command-line options to podman play kube).

rhatdan · 2022-12-12T12:32:09Z

We already do some of this with annotations now.

man podman-kube-play

...
Note: When playing a kube YAML with init containers, the init container
       will  be created with init type value once. To change the default type,
       use the io.podman.annotations.init.container.type annotation to set the
       type to always.
...
       Kubernetes PersistentVolumeClaims

       A  Kubernetes  PersistentVolumeClaim  represents a Podman named volume.
       Only the PersistentVolumeClaim name is required by Podman to  create  a
       volume. Kubernetes annotations can be used to make use of the available
       options for Podman volumes.

              • volume.podman.io/driver

              • volume.podman.io/device

              • volume.podman.io/type

              • volume.podman.io/uid

              • volume.podman.io/gid

              • volume.podman.io/mount-options

github-actions · 2023-01-12T00:06:54Z

A friendly reminder that this issue had no activity for 30 days.

paul-grozav · 2023-01-12T07:12:32Z

However I would still need a fix to this problem. I'm hoping that when @cdoern has some updates, he'll let us know 🤞 . Thank you !

umohnani8 · 2023-01-12T12:19:17Z

I will get started on this next week.

github-actions · 2023-02-13T00:07:27Z

A friendly reminder that this issue had no activity for 30 days.

openshift-ci bot added the kind/feature Categorizes issue or PR as related to a new feature. label Nov 4, 2022

rhatdan added the kube label Nov 4, 2022

cdoern self-assigned this Nov 7, 2022

github-actions bot added the stale-issue label Jan 12, 2023

umohnani8 assigned umohnani8 and unassigned cdoern Jan 12, 2023

github-actions bot removed the stale-issue label Jan 14, 2023

umohnani8 mentioned this issue Feb 6, 2023

Add ulimit annotation to kube gen & play #17379

Merged

github-actions bot added the stale-issue label Feb 13, 2023

umohnani8 removed the stale-issue label Feb 13, 2023

openshift-merge-robot closed this as completed in #17379 Feb 14, 2023

github-actions bot added the locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments. label Sep 1, 2023

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There is no option to set ulimit while using podman kube play #16404

There is no option to set ulimit while using podman kube play #16404

paul-grozav commented Nov 4, 2022

vrothberg commented Nov 4, 2022

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rhatdan commented Nov 4, 2022

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paul-grozav commented Jan 12, 2023 •

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github-actions bot commented Feb 13, 2023

There is no option to set ulimit while using podman kube play #16404

There is no option to set ulimit while using podman kube play #16404

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paul-grozav commented Nov 4, 2022

vrothberg commented Nov 4, 2022

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