OpenShift Image Streams (is)
An OpenShift image stream is made up of any number of container images identified by tags. It presents a single virtual view of the the images. Using image streams prevents your application from breaking if the upstream image’s update introduced errors. Image change triggers and periodic imports can be configured at the image stream’s level. Image streams are pointers to images in other repositories.
Log into the project to get the list of image streams
$ oc login -u <user> $ oc get is if you switch to the openshift project and get the list of image streams you will see all the default image streams that are installed. oc get is NAME DOCKER REPO TAGS UPDATED dotnet 172.30.1.1:5000/openshift/dotnet 2.0,latest 2 months ago httpd 172.30.1.1:5000/openshift/httpd 2.4,latest 2 months ago jenkins 172.30.1.1:5000/openshift/jenkins 1,2,latest 2 months ago mariadb 172.30.1.1:5000/openshift/mariadb 10.1,10.2,latest 2 months ago mongodb 172.30.1.1:5000/openshift/mongodb 2.4,2.6,3.2 + 3 more... 2 months ago
Image stream mongodb pings to 172.30.1.1:5000/openshift/mongodb
Use describe to get the list of tags
$oc describe is/python
Name: python
Namespace: openshift
Created: 2 months ago
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration={"apiVers........
openshift.io/display-name=Python
openshift.io/image.dockerRepositoryCheck=2019-05-04T19:07:33Z
Docker Pull Spec: 172.30.1.1:5000/openshift/python
Image Lookup: local=false
Unique Images: 5
Tags: 6
3.6 (latest)
tagged from docker.io/centos/python-36-centos7:latest
prefer registry pullthrough when referencing this tag
Build and run Python 3.6 applications on CentOS 7. For more information about using this builder image, including OpenShift considerations, see https://github.com/sclorg/s2i-python-container/blob/master/3.6/README.md.
Tags: builder, python
Supports: python:3.6, python
Example Repo: https://github.com/openshift/django-ex.git
* docker.io/centos/python-36-centos7@sha256:d10c46b6db436357965a96716e9f5d230d9b1a58c6db1f0c4f43c1fb1994cd79
2 months ago
3.5
tagged from docker.io/centos/python-35-centos7:latest
prefer registry pullthrough when referencing this tag
Build and run Python 3.5 applications on CentOS 7. For more information about using this builder image, including OpenShift considerations, see https://github.com/sclorg/s2i-python-container/blob/master/3.5/README.md.
Tags: builder, python
Supports: python:3.5, python
Example Repo: https://github.com/openshift/django-ex.git
* docker.io/centos/python-35-centos7@sha256:d2018907a8ffa94644fccc8e3821a0945c600a16337c11c1a761e86159d69870
2 months ago
Image stream python:3.6 points to docker.io/centos/python-36-centos7:latest
Image stream python:3.5 points to docker.io/centos/python-35-centos7:latest
Image Streams can be created by importing images from externa registries to the internal registries
$ oc import-image django --confirm imagestream.image.openshift.io/django imported Name: django Namespace: openshift Created: Less than a second ago Labels: <none> Annotations: openshift.io/image.dockerRepositoryCheck=2019-07-21T22:35:53Z Docker Pull Spec: 172.30.1.1:5000/openshift/django Image Lookup: local=false Unique Images: 1 Tags: 1 latest tagged from django * django@sha256:5bfd3f442952463f5bc97188b7f43cfcd6c2f631a017ee2a6fca3cb8992501e8 Less than a second ago Image Name: django:latest Docker Image: django@sha256:5bfd3f442952463f5bc97188b7f43cfcd6c2f631a017ee2a6fca3cb8992501e8 Name: sha256:5bfd3f442952463f5bc97188b7f43cfcd6c2f631a017ee2a6fca3cb8992501e8 Created: Less than a second ago Annotations: image.openshift.io/dockerLayersOrder=ascending Image Size: 158MB in 6 layers Layers: 51.36MB sha256:75a822cd7888e394c49828b951061402d31745f596b1f502758570f2d0ee79e2 3.339MB sha256:e4665cede9d1cf30769226da349e1f7e35bf16f75d90688b9cab8569ce00ab79 19.62MB sha256:202a45aa091cf861e5386d46a4b55c0015df3135850c8a920cb7615e6e10dda0 266B sha256:7799136eb56180bd9f5f64c4854f5bf36a603da3c849be202045329a223d0d8b 68.27MB sha256:7a7f9ca3fd40be6ec30a1b27cba2eec6ecebbbc58e4dcf24c3716f2c8c401fdb 15.44MB sha256:412f2d081014e91977d969a4076744ae04cc7d52f793ab9d49a3a0f1ca4ffcc1 Image Created: 2 years ago Author: <none> Arch: amd64 Command: python3 Working Dir: <none> User: <none> Exposes Ports: <none> Docker Labels: <none> Environment: PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin LANG=C.UTF-8 GPG_KEY=97FC712E4C024BBEA48A61ED3A5CA953F73C700D PYTHON_VERSION=3.4.5 PYTHON_PIP_VERSION=9.0.1 DJANGO_VERSION=1.10.4
We can do the oc get is to show the imported django
$ oc get is NAME DOCKER REPO TAGS UPDATED django 172.30.1.1:5000/openshift/django latest 17 seconds ago dotnet 172.30.1.1:5000/openshift/dotnet latest,2.0 2 months ago httpd 172.30.1.1:5000/openshift/httpd latest,2.4 2 months ago jenkins 172.30.1.1:5000/openshift/jenkins 1,2,latest 2 months ago mariadb 172.30.1.1:5000/openshift/mariadb 10.2,latest,10.1 2 months ago
To add a tag to the imported images
$ oc tag django:latest django:1.10.4 Tag django:1.10.4 set to django@sha256:5bfd3f442952463f5bc97188b7f43cfcd6c2f631a017ee2a6fca3cb8992501e8. $ oc get is NAME DOCKER REPO TAGS UPDATED django 172.30.1.1:5000/openshift/django 1.10.4,latest 3 seconds ago dotnet 172.30.1.1:5000/openshift/dotnet 2.0,latest 2 months ago httpd 172.30.1.1:5000/openshift/httpd 2.4,latest 2 months ago jenkins 172.30.1.1:5000/openshift/jenkins 1,2,latest 2 months ago
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