5:27 p.m.
Hello,
I have a rootless container running postgrey on a Rocky Linux 8 server.
Besides the fact I had problems getting the container running rootless,
which I overcame, the new issue is that connections to the exposed port
are established and then immediately dropped. I can't figure out why
this is happening.
Here's postgrey listening inside the container:
[containers@bigsecret ~]$ podman exec -ti postgrey ss -tln
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 127.0.0.1:10023 0.0.0.0:*
I can connect to the port inside of the container and the connection
stays up until I cancel it:
[containers@bigsecret ~]$podman exec -ti postgrey telnet localhost 10023
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
If I try to telnet to the port from the container host using the host's
routable IP or from different server, I get a "Connection closed by
foreign host." message immediately after the connection is established.
I have systemd enabled in the container. I can control the postgrey
daemon with systemd and systemd doesn't report any errors when I check
the daemon's status.
I don't see any selinux denials. I tried turning off enforcement anyway
and saw no change. I did see language errors being logged by postgrey,
so I installed the missing RPMs in the running container (I'm just
testing things out with this container), which got rid of those errors.
But, that didn't change the connection weirdness.
Any ideas what the problem could be? The pod and container definitions
are below.
pod
{
"Id":
"a9292128fc778c6287e80ff71d5e2ee1320b3395dc48a7e31af1db77cc7f695a",
"Name": "smtp",
"Created": "2021-11-25T12:58:55.447833371-05:00",
"CreateCommand": [
"podman",
"pod",
"create",
"--name",
"smtp",
"--publish",
"1.2.3.4:10023:10023",
"--publish",
"1.2.3.4:1587:587",
"--publish",
"1.2.3.4:1783:783",
"--publish",
"1.2.3.4:1025:25"
],
"State": "Running",
"Hostname": "smtp",
"CreateCgroup": true,
"CgroupParent": "user.slice",
"CgroupPath":
"user.slice/user-libpod_pod_a9292128fc778c6287e80ff71d5e2ee1320b3395dc48a7e31af1db77cc7f695a.slice",
"CreateInfra": true,
"InfraContainerID":
"a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4",
"InfraConfig": {
"PortBindings": {
"10023/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "10023"
}
],
"25/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1025"
}
],
"587/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1587"
}
],
"783/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1783"
}
]
},
"HostNetwork": false,
"StaticIP": "",
"StaticMAC": "",
"NoManageResolvConf": false,
"DNSServer": null,
"DNSSearch": null,
"DNSOption": null,
"NoManageHosts": false,
"HostAdd": null,
"Networks": null,
"NetworkOptions": null
},
"SharedNamespaces": [
"ipc",
"net",
"uts"
],
"NumContainers": 2,
"Containers": [
{
"Id":
"a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4",
"Name": "a9292128fc77-infra",
"State": "running"
},
{
"Id":
"f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57",
"Name": "postgrey",
"State": "running"
}
]
}
container
[
{
"Id":
"f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57",
"Created": "2021-12-05T00:18:28.942285862-05:00",
"Path": "/usr/sbin/init",
"Args": [
"/usr/sbin/init"
],
"State": {
"OciVersion": "1.0.2-dev",
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 6047,
"ConmonPid": 6031,
"ExitCode": 0,
"Error": "",
"StartedAt": "2021-12-22T14:32:26.339653403-05:00",
"FinishedAt": "2021-12-22T14:27:28.403171029-05:00",
"Healthcheck": {
"Status": "",
"FailingStreak": 0,
"Log": null
}
},
"Image":
"9aefd5346e1f34b16a096b52575cc249b14a9a56664c6e1f2113ad3ef449c025",
"ImageName": "localhost/postgrey-v0.0.3:latest",
"Rootfs": "",
"Pod":
"a9292128fc778c6287e80ff71d5e2ee1320b3395dc48a7e31af1db77cc7f695a",
"ResolvConfPath":
"/tmp/podman-run-1000/containers/overlay-containers/a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4/userdata/resolv.conf",
"HostnamePath":
"/tmp/podman-run-1000/containers/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata/hostname",
"HostsPath":
"/tmp/podman-run-1000/containers/overlay-containers/a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4/userdata/hosts",
"StaticDir":
"/srv/containers/storage/1000/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata",
"OCIConfigPath":
"/srv/containers/storage/1000/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata/config.json",
"OCIRuntime": "runc",
"ConmonPidFile":
"/tmp/podman-run-1000/containers/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata/conmon.pid",
"PidFile":
"/tmp/podman-run-1000/containers/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata/pidfile",
"Name": "postgrey",
"RestartCount": 0,
"Driver": "overlay",
"MountLabel":
"system_u:object_r:container_file_t:s0:c654,c974",
"ProcessLabel":
"system_u:system_r:container_init_t:s0:c654,c974",
"AppArmorProfile": "",
"EffectiveCaps": [
"CAP_CHOWN",
"CAP_DAC_OVERRIDE",
"CAP_FOWNER",
"CAP_FSETID",
"CAP_KILL",
"CAP_NET_BIND_SERVICE",
"CAP_NET_RAW",
"CAP_SETFCAP",
"CAP_SETGID",
"CAP_SETPCAP",
"CAP_SETUID",
"CAP_SYS_CHROOT"
],
"BoundingCaps": [
"CAP_CHOWN",
"CAP_DAC_OVERRIDE",
"CAP_FOWNER",
"CAP_FSETID",
"CAP_KILL",
"CAP_NET_BIND_SERVICE",
"CAP_NET_RAW",
"CAP_SETFCAP",
"CAP_SETGID",
"CAP_SETPCAP",
"CAP_SETUID",
"CAP_SYS_CHROOT"
],
"ExecIDs": [],
"GraphDriver": {
"Name": "overlay",
"Data": {
"LowerDir":
"/srv/containers/storage/1000/overlay/2a356f237c2fe380f476133e0939553512ac8167ff7cbb2338d9405090528f7e/diff:/srv/containers/storage/1000/overlay/04f97fe38f3ca40a0d4a7ee7f6da4276ab30746e05c360975bd2e3569afde128/diff:/srv/containers/storage/1000/overlay/4d50441def2b07f8fcd48aad187815089621ddccf2384180db0c28c5272889f8/diff:/srv/containers/storage/1000/overlay/7933807b1a3f6ecbc852d38f269984065dfb57d49ddf40fdea70dfe66a6c6b14/diff:/srv/containers/storage/1000/overlay/1855256707116c0c229fec2d3a60bce4a11fdfc8b0bffa9663c84e69ec326160/diff",
"MergedDir":
"/srv/containers/storage/1000/overlay/113bb9169c33b29659143e14363c6a8fc07a7cd6a8ffc72697337a83200db18e/merged",
"UpperDir":
"/srv/containers/storage/1000/overlay/113bb9169c33b29659143e14363c6a8fc07a7cd6a8ffc72697337a83200db18e/diff",
"WorkDir":
"/srv/containers/storage/1000/overlay/113bb9169c33b29659143e14363c6a8fc07a7cd6a8ffc72697337a83200db18e/work"
}
},
"Mounts": [
{
"Type": "volume",
"Name": "postgrey",
"Source":
"/srv/containers/storage/1000/volumes/postgrey/_data",
"Destination": "/var/spool/postfix/postgrey",
"Driver": "local",
"Mode": "Z",
"Options": [
"nosuid",
"nodev",
"rbind"
],
"RW": true,
"Propagation": "rprivate"
},
{
"Type": "volume",
"Name":
"5e82bc179344af8710114ca61f84dbfe7a8866c8aac5fab6bcef70e6cba6df76",
"Source":
"/srv/containers/storage/1000/volumes/5e82bc179344af8710114ca61f84dbfe7a8866c8aac5fab6bcef70e6cba6df76/_data",
"Destination": "/sys/fs/cgroup",
"Driver": "local",
"Mode": "",
"Options": [
"nodev",
"exec",
"nosuid",
"rbind"
],
"RW": true,
"Propagation": "rprivate"
}
],
"Dependencies": [
"a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4"
],
"NetworkSettings": {
"EndpointID": "",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"Bridge": "",
"SandboxID": "",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"10023/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "10023"
}
],
"25/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1025"
}
],
"587/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1587"
}
],
"783/tcp": [
{
"HostIp": "1.2.3.4",
"HostPort": "1783"
}
]
},
"SandboxKey":
"/run/user/1000/netns/cni-a2c22e7a-f19f-8320-fe77-9d44a822154d"
},
"ExitCommand": [
"/usr/bin/podman",
"--root",
"/srv/containers/storage/1000",
"--runroot",
"/tmp/podman-run-1000/containers",
"--log-level",
"warning",
"--cgroup-manager",
"systemd",
"--tmpdir",
"/tmp/run-1000/libpod/tmp",
"--runtime",
"runc",
"--storage-driver",
"overlay",
"--storage-opt",
"overlay.mount_program=/usr/bin/fuse-overlayfs",
"--events-backend",
"file",
"container",
"cleanup",
"f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57"
],
"Namespace": "",
"IsInfra": false,
"Config": {
"Hostname": "smtp",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": true,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"TERM=xterm",
"container=docker",
"HOME=/root",
"HOSTNAME=smtp"
],
"Cmd": [
"/usr/sbin/init"
],
"Image": "localhost/postgrey-v0.0.3:latest",
"Volumes": null,
"WorkingDir": "/",
"Entrypoint": "",
"OnBuild": null,
"Labels": {
"io.buildah.version": "1.21.3",
"org.label-schema.build-date": "20210620",
"org.label-schema.license": "BSD-3-Clause",
"org.label-schema.name": "Rocky Linux Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "Rocky Enterprise Software
Foundation",
"org.opencontainers.image.created": "2021-06-20
00:00:00+01:00",
"org.opencontainers.image.licenses": "BSD-3-Clause",
"org.opencontainers.image.title": "Rocky Linux Base
Image",
"org.opencontainers.image.vendor": "Rocky Enterprise
Software Foundation"
},
"Annotations": {
"io.container.manager": "libpod",
"io.kubernetes.cri-o.ContainerType": "container",
"io.kubernetes.cri-o.Created":
"2021-12-05T00:18:28.942285862-05:00",
"io.kubernetes.cri-o.SandboxID": "smtp",
"io.kubernetes.cri-o.TTY": "true",
"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": "37"
},
"StopSignal": 37,
"CreateCommand": [
"podman",
"run",
"-d",
"-t",
"--name",
"postgrey",
"--pod",
"smtp",
"--volume",
"postgrey:/var/spool/postfix/postgrey:Z",
"postgrey-v0.0.3"
],
"SystemdMode": true,
"Umask": "0022",
"Timeout": 0,
"StopTimeout": 10
},
"HostConfig": {
"Binds": [
"postgrey:/var/spool/postfix/postgrey:Z,rw,rprivate,nosuid,nodev,rbind",
"5e82bc179344af8710114ca61f84dbfe7a8866c8aac5fab6bcef70e6cba6df76:/sys/fs/cgroup:rprivate,rw,nodev,exec,nosuid,rbind"
],
"CgroupManager": "systemd",
"CgroupMode": "private",
"ContainerIDFile": "",
"LogConfig": {
"Type": "k8s-file",
"Config": null,
"Path":
"/srv/containers/storage/1000/overlay-containers/f32c676da8eb38f3e45bb8670e0d8330707fa3dfc216238e4f73bbe638d85a57/userdata/ctr.log",
"Tag": "",
"Size": "0B"
},
"NetworkMode":
"container:a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4",
"PortBindings": {},
"RestartPolicy": {
"Name": "",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": [],
"CapDrop": [
"CAP_AUDIT_WRITE",
"CAP_MKNOD"
],
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": [],
"GroupAdd": [],
"IpcMode":
"container:a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4",
"Cgroup": "",
"Cgroups": "default",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "private",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": [],
"Tmpfs": {},
"UTSMode":
"container:a75ed34c8117daaff8be1e9060c07478b6894d4d06a93c963142d8b3de95b0a4",
"UsernsMode": "",
"ShmSize": 65536000,
"Runtime": "oci",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent":
"user.slice/user-libpod_pod_a9292128fc778c6287e80ff71d5e2ee1320b3395dc48a7e31af1db77cc7f695a.slice",
"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": [],
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"CgroupConf": null
}
}
]
--
Ranbir