docker search hello-world
Error response from daemon: invalid registry endpoint https://registry.access.redhat.com/v1/: Get https://registry.access.redhat.com/v1/_ping: dial tcp: lookup registry.access.redhat.com on 127.0.0.1:53: no such host. If this private registry supports only HTTP or HTTPS with an unknown CA certificate, please add `--insecure-registry registry.access.redhat.com` to the daemon's arguments. In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag; simply place the CA certificate at /etc/docker/certs.d/registry.access.redhat.com/ca.crt
https://rhelblog.redhat.com/2015/04/15/understanding-the-changes-to-docker-search-and-docker-pull-in-red-hat-enterprise-linux-7-1/
"The Red Hat default config in ‘/etc/sysconfig/docker’ adds ‘registry.access.redhat.com’, which is the authoritative source for official Red Hat content. The default docker.io search path is hardcoded and remains enabled."
eg:
cat /etc/sysconfig/docker
# /etc/sysconfig/docker
# Modify these options if you want to change the way the docker daemon runs
OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false'
if [ -z "${DOCKER_CERT_PATH}" ]; then
DOCKER_CERT_PATH=/etc/docker
fi
# Do not add registries in this file anymore. Use /etc/containers/registries.conf
# from the atomic-registries package.
#
# On an SELinux system, if you remove the --selinux-enabled option, you
# also need to turn on the docker_transition_unconfined boolean.
# setsebool -P docker_transition_unconfined 1
# Location used for temporary files, such as those created by
# docker load and build operations. Default is /var/lib/docker/tmp
# Can be overriden by setting the following environment variable.
# DOCKER_TMPDIR=/var/tmp
# Controls the /etc/cron.daily/docker-logrotate cron job status.
# To disable, uncomment the line below.
# LOGROTATE=false
# docker-latest daemon can be used by starting the docker-latest unitfile.
# To use docker-latest client, uncomment below lines
#DOCKERBINARY=/usr/bin/docker-latest
#DOCKERDBINARY=/usr/bin/dockerd-latest
#DOCKER_CONTAINERD_BINARY=/usr/bin/docker-containerd-latest
#DOCKER_CONTAINERD_SHIM_BINARY=/usr/bin/docker-containerd-shim-latest
and
cat /etc/containers/registries.conf
# This is a system-wide configuration file used to # keep track of registries for various container backends. # It adheres to TOML format and does not support recursive # lists of registries. # The default location for this configuration file is /etc/containers/registries.conf. # The only valid categories are: 'registries.search', 'registries.insecure', # and 'registries.block'. [registries.search] registries = ['registry.access.redhat.com'] # If you need to access insecure registries, add the registry's fully-qualified name. # An insecure registry is one that does not have a valid SSL certificate or only does HTTP. [registries.insecure] registries = [] # If you need to block pull access from a registry, uncomment the section below # and add the registries fully-qualified name. # # Docker only [registries.block] registries = []
