<p>I have created three openshift container registries. For example I will use the below addresses:</p>

<p><a href="https://openshift-registry-1.com" rel="nofollow noreferrer">https://openshift-registry-1.com</a><br>
<a href="https://openshift-registry-2.com" rel="nofollow noreferrer">https://openshift-registry-2.com</a><br> 
<a href="https://openshift-registry-3.com" rel="nofollow noreferrer">https://openshift-registry-3.com</a><br></p>

<p>I am looking for a way or a tool to push the same image to all three in one action.</p>

<p>I would use the <a href="https://github.com/containers/skopeo" rel="nofollow noreferrer">skopeo</a> cli for this from inside my cicd/orchestration tool of choice (e.g. Jenkins, Ansible Tower, etc). skopeo is a command line utility that performs various operations on container images and image repositories.</p>

<p>Take a look at the official OpenShift blog post <a href="https://blog.openshift.com/promoting-container-images-between-registries-with-skopeo/" rel="nofollow noreferrer">Promoting container images between container registries with skopeo</a> for example usage.</p>

<p>The example they post there:</p>

<pre><code>def namespace, appReleaseTag, webReleaseTag, prodCluster, prodProject, prodToken

pipeline {
agent {
label 'skopeo'
}
stages {
stage('Choose Release Version') {
steps {
script {
openshift.withCluster() {
// Login to the production cluster
namespace = openshift.project()
prodCluster = env.PROD_MASTER.replace("https://","insecure://")
withCredentials([usernamePassword(credentialsId: "${namespace}-prod-credentials", usernameVariable: "PROD_USER", passwordVariable: "PROD_TOKEN")]) {
prodToken = env.PROD_TOKEN
}

// Get list of tags in the ImageStream to show the release-manager
def appTags = openshift.selector("istag").objects().collect { it.metadata.name }.findAll { it.startsWith 'app:' }.collect { it.replaceAll(/app:(.*)/, "\$1") }.sort()
timeout(5) {
def inputs = input(
ok: "Deploy",
message: "Enter release version to promote to PROD",
parameters: [
string(defaultValue: "prod", description: 'Name of the PROD project to create', name: 'PROD Project Name'),
choice(choices: appTags.join('\n'), description: '', name: 'Application Release Version'),
]
)
appReleaseTag = inputs['Application Release Version']
prodProject = inputs['PROD Project Name']
}
}
}
}
}
stage('Create PROD') {
steps {
script {
openshift.withCluster(prodCluster, prodToken) {
openshift.newProject(prodProject, "--display-name='CoolStore PROD'")
}
}
}
}
stage('Promote Images to PROD') {
steps {
script {
openshift.withCluster() {
def srcApplicationRef = openshift.selector("istag", "app:${appReleaseTag}").object().image.dockerImageReference
def destApplicationRef = "${env.PROD_REGISTRY}/${prodProject}/app:${appReleaseTag}"
def srcToken = readFile "/run/secrets/kubernetes.io/serviceaccount/token"
sh "skopeo copy docker://${srcApplicationRef} docker://${destApplicationRef} --src-creds openshift:${srcToken} --dest-creds openshift:${prodToken}"
}
}
}
}
stage('Deploy to PROD') {
steps {
script {
openshift.withCluster(prodCluster, prodToken) {
openshift.withProject(prodProject) {
def template = 'https://raw.githubusercontent.com/openshift-labs/myapp/myapp-template.yaml'
openshift.apply(
openshift.process("-f", template, "-p", "APPLICATION_IMAGE_VERSION=${appReleaseTag}", "-p", "IMAGE_NAMESPACE=")
)
}
}
}
}
}
}
}
</code></pre>
