Registro inseguro de Docker en Centos7 se niega a ingerir imágenes, incluso con la bandera 'insecurity-loggings'

Intento implementar un inseguro Registro Docker en un server CentOS7:

docker run -d -p 5000:5000 --restart=always --name registry registry:2 

Configuré Docker de esta manera:

 # /etc/docker/daemon.json { "insecure-registries":["registry.mydomain.com:5000"] } 

Con eso, la docker info me da:

 Containers: 1 Running: 1 Paused: 0 Stopped: 0 Images: 2 Server Version: 1.12.4 Storage Driver: devicemapper Pool Name: docker-253:2-650870-pool Pool Blocksize: 65.54 kB Base Device Size: 10.74 GB Backing Filesystem: xfs Data file: /dev/loop0 Metadata file: /dev/loop1 Data Space Used: 69.86 MB Data Space Total: 107.4 GB Data Space Available: 50.4 GB Metadata Space Used: 708.6 kB Metadata Space Total: 2.147 GB Metadata Space Available: 2.147 GB Thin Pool Minimum Free Space: 10.74 GB Udev Sync Supported: true Defernetworking Removal Enabled: false Defernetworking Deletion Enabled: false Defernetworking Deleted Device Count: 0 Data loop file: /var/lib/docker/devicemapper/devicemapper/data WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device. Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata Library Version: 1.02.135-RHEL7 (2016-09-28) Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: null host bridge overlay Swarm: inactive Runtimes: runc Default Runtime: runc Security Options: seccomp Kernel Version: 3.10.0-327.36.3.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 1 Total Memory: 489.1 MiB Name: ASB-Registry ID: KNQD:2AVN:EG5H:VV7U:US7G:SJ2D:G2FY:UAZK:N2NY:FQAA:CQJV:N2IS Docker Root Dir: /var/lib/docker Debug Mode (client): false Debug Mode (server): false Registry: https://index.docker.io/v1/ WARNING: bridge-nf-call-iptables is disabled WARNING: bridge-nf-call-ip6tables is disabled Insecure Registries: registry.mydomain.com:5000 127.0.0.0/8 

Asi que:

  Insecure Registries: registry.mydomain.com:5000 127.0.0.0/8 

Aparece correctamente

Sin embargo, cuando bash insert un contenedor en ese logging:

 docker push registry.mydomain.com:5000/my_image 

Obtengo el siguiente logging:

 The push refers to a repository [registry.mydomain.com:5000/my_image] Get https://registry.mydomain.com:5000/v1/_ping: http: server gave HTTP response to HTTPS client 

¿Alguna idea?