Not able to use the docker daemon from the CentOS ISO

[LalatenduMohanty]

Error: could not read CA certificate "/etc/docker/ca.pem": open /etc/docker/ca.pem: no such file or directory OS: F25 + KVM

Steps to reproduce:

$ minishift start --iso-url file:///home/lmohanty/Downloads/minishift-centos7.iso

$ minishift docker-env
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.42.187:2376"
export DOCKER_CERT_PATH="/home/lmohanty/.minishift/certs"
export DOCKER_API_VERSION="1.24"
# Run this command to configure your shell: 
# eval $(minishift docker-env)

$ eval $(minishift docker-env)

$ docker ps
could not read CA certificate "/etc/docker/ca.pem": open /etc/docker/ca.pem: no such file or directory

[praveenkumar]

This is not issue with the ISO at all because docker daemon from ISO is generating correct certs info and putting back to host now what happened here is host docker version not honoring the DOCKER_CERT_PATH which we need to dig.

$ eval $(./minishift docker-env)
[prkumar@localhost ~]$ docker --tlscacert=/home/prkumar/.minishift/certs/ca.pem --tlscert=/home/prkumar/.minishift/certs/cert.pem --tlskey=/home/prkumar/.minishift/certs/key.pem info
Containers: 5
 Running: 5
 Paused: 0
 Stopped: 0
Images: 5
Server Version: 1.12.5
Storage Driver: devicemapper
 Pool Name: docker-8:1-1568270-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop5
 Metadata file: /dev/loop6
 Data Space Used: 704.7 MB
 Data Space Total: 107.4 GB
 Data Space Available: 18.27 GB
 Metadata Space Used: 1.438 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.146 GB
 Thin Pool Minimum Free Space: 10.74 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /mnt/sda1/var/lib/docker/devicemapper/devicemapper/data
 WARNING: Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.
 Metadata loop file: /mnt/sda1/var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.135-RHEL7 (2016-11-16)
Logging Driver: json-file
Plugins: 
 Volume: local
 Network: host bridge overlay null
Kernel Version: 3.10.0-514.6.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 2
CPUs: 2
Total Memory: 1.954 GiB
Name: minishift
ID: 62YH:UYXS:GYOR:DAEG:ET54:AGNF:7DXR:FXAU:AEX7:IN4V:HJ6I:TU7E
Labels:
 provider=kvm
Registries: docker.io (secure)

$ docker info <= here host docker daemon not taking DOCKER_CERT_PATH variable
Could not read CA certificate "/etc/docker/ca.pem": open /etc/docker/ca.pem: no such file or directory

[praveenkumar]

Closing this issue not related to ISO.

[LalatenduMohanty]

It is an issue in Fedora 25 and it is tracked in https://bugzilla.redhat.com/show_bug.cgi?id=1402074

[gbraad]

Please keep open, as it causes issues for our instructions on Fedora 25. Please close when verified with a working version.

[gbraad]

Oh, this is on CentOS ISO... will create a new issue for minishift