minikube creating >1000 files in /tmp (1-3 per run)

[paulcarlton]

I'm seeing lots of files being created in /tmp when I run minikube

pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ cat /tmp/minikube.pcarlton1.pcarlton.log.WARNING.20180620-093000.14780 
Log file created at: 2018/06/20 09:30:00
Running on machine: pcarlton1
Binary: Built with gc go1.9.1 for linux/amd64
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ ls -l /tmp | grep minikube.pcarlton1.pcarlton.log | wc -l
1452
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ cat /tmp/minikube.pcarlton1.pcarlton.log.INFO.20180620-093015.15416
Log file created at: 2018/06/20 09:30:15
Running on machine: pcarlton1
Binary: Built with gc go1.9.1 for linux/amd64
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
I0620 09:30:15.721658   15416 notify.go:109] Checking for updates...
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ ls -l /tmp | grep minikube.pcarlton1.pcarlton.log | wc -l
1480

minikube version
minikube version: v0.28.0
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "";

pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "OS:";
OS:
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04.4 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.4 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "";

pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "VM driver": 
VM driver:
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ grep DriverName ~/.minikube/machines/minikube/config.json
    "DriverName": "kvm2",
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "";

pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ echo "ISO version";
ISO version
pcarlton@pcarlton1:~/src/github.hpe.com/paul-carlton2/dev-stuff$ grep -i ISO ~/.minikube/machines/minikube/config.json
        "Boot2DockerURL": "file:///home/pcarlton/.minikube/cache/iso/minikube-v0.28.0.iso",
        "ISO": "/home/pcarlton/.minikube/machines/minikube/boot2docker.iso",

how can I fix this?

[Sicaine]

Is this a problem for you when a tool creates files in /tmp?

[paulcarlton]

A few files are ok but we are talking about hundreds of files
ls -l /tmp | grep minikube.pcarlton1.pcarlton.log | wc -l
1452

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[tstromberg]

Generally, minikube only creates a single .INFO file per execution, with the format of:

minikube..INFO..

minikube will also symlink the latest .INFO file to /tmp/minikube.INFO. These two behaviors are inherited from https://github.com/golang/glog

If minikube needs to log lines at ERROR or WARNING level, these will be extracted out into .ERROR and .WARNING files appropriately. At maximum, you should be seeing 3 files per minikube execution, plus a set of symlinks to the latest run.

We could presumably change these behaviors by switching to a different logging library, but I'm not yet convinced that it is of great benefit to change the behavior. Will leave this bug open though just in case.

FWIW, on my workstation where I execute minikube dozens of times a day, I had 142 files in /tmp. My OS also automatically cleans up stale /tmp files, however.