Some zombie processes in ROS

[niusmallnan]

RancherOS Version: (ros os version)
v1.5.0-rc1
Where are you running RancherOS? (docker-machine, AWS, GCE, baremetal, etc.)
All

Boot a vm on AWS with default console:

$ ps -A -ostat,ppid,pid,comm,args| grep Z
Z        1   303 udevd            [udevd]
Z        1   305 udevd            [udevd]
Z        1   307 udevd            [udevd]
Z        1   308 udevd            [udevd]
Z        1   309 udevd            [udevd]
Z        1   310 udevd            [udevd]
Z        1   311 udevd            [udevd]
Z        1   312 udevd            [udevd]
Z        1   313 udevd            [udevd]
Z        1   314 udevd            [udevd]
Z        1   315 udevd            [udevd]
Z        1   316 udevd            [udevd]
Z        1   317 udevd            [udevd]
Z        1   488 ros              [ros]

Boot a vm on Virtualbox without cloud-init:

$ ps -A -ostat,ppid,pid,comm,args| grep Z
Z        1    84 ros              [ros]

Boot a vm anywhere then switch console:

$ ps -A -ostat,ppid,pid,comm,args| grep Z
Z        1    84 ros              [ros]
Z        1   766 bash             [bash]
Z        1  1066 bash             [bash]
Z        1  1074 sshd             [sshd]
Z        1  1076 sshd             [sshd]
Z        1  1077 bash             [bash]
Z        1  1080 bash             [bash]
Z        1  1786 system-docker    [system-docker]
Z        1  2071 sshd             [sshd]
Z        1  2073 sshd             [sshd]
Z        1  2074 bash             [bash]
Z        1  2077 bash             [bash]
Z        1  2308 system-docker    [system-docker]

[niusmallnan]

If we set rancher.system_docker.exec=false, there will be no zombie process [ros]. But system-docker will no longer be pid 1:

# ps -A -ostat,ppid,pid,comm,args| grep system-dockerd
S        1    85 system-dockerd   /usr/bin/system-dockerd ....

# ps -A -ostat,ppid,pid,comm,args| grep init
S        0     1 init             /init

[rootwuj]

Version - rancher/os:v1.5.0-rc2 12/13
Verified fixed