how to deploy a basic html website on gke, what do i need other than the dockerfile and the .html application itself? i have tried deploying applications which already have all the yaml files included but i don't know how to start from scratch. i don't have a lot of experience and i haven't found anything online about this. can anyone provide a step by step tutorial? what do i do after creating the cluster? taken the website is called hey.html, is this dockerfile enough?
FROM nginx:alpine
RUN apt-get update
RUN apt-get install -y ngin
COPY hey.html/usr/share/nginx/html
EXPOSE 80
To deploy any application in GKE you will need some Kubernetes and GCP knowledge. You can start with official documentation, Coursera path about GKE and Kubernetes in Cloud, official documentation or this article which will introduce you to the basic concepts.
I can start from recommending a good tutorial from Kubernetes official documentation on how to deploy example PHP Guestbook application with Redis it should give you a practical example on how to deploy from scratch.
It also uses a service of a type LoadBalancer which will use a controller to tell GCP to create a LoadBalancer that will expose your application to Internet so you do not have to deal with anything to expose the app.
About your Docker file, the workflow will look something like this:
Push your Dockerfile to a registry (some useful materials here), you will put that docker image into a deployment for easier future management and then create a service because pods are mortal and replaceable and service will take care of traffic send to right pods even when they will be recreated, you might also need some persistent volume but this will be specific to your application. And here you will find another good how-to by Google.
Try this and if you will have issues just ask another question with details of the problems that occurred.
See below to make changes in dockerfile
FROM nginx:alpine
RUN apt-get update
COPY hey.html /usr/share/nginx/html
EXPOSE 80
Related
I created a project from https://fiware-tutorials.readthedocs.io/en/latest/time-series-data.html tutorial and just changed the entities name and type and everything work right. But after some time (usually a day) all entities in Orion disappears (although the data in Quantumleap persists) and I can not get the entities properties with this command :
curl -X GET \
--url 'http://localhost:1026/v2/entities?type=Temp'
What is the problem? is there some restriction in tutorial projects?
The tutorials have been written as an introduction to NGSI, not as a robust architectural solution. The idea is just to get something "quick and dirty" up and running on a developer's machine and various shortcuts have been taken. Indeed the docker-compose files all hold the following disclaimer:
WARNING: Do not deploy this tutorial configuration directly to a production environment
The tutorial docker-compose files have not been written for production deployment and will not
scale. A proper architecture has been sacrificed to keep the narrative focused on the learning
goals, they are just used to deploy everything onto a single Docker machine. All FIWARE components
are running at full debug and extra ports have been exposed to allow for direct calls to services.
They also contain various obvious security flaws - passwords in plain text, no load balancing,
no use of HTTPS and so on.
This is all to avoid the need of multiple machines, generating certificates, encrypting secrets
and so on, purely so that a single docker-compose file can be read as an example to build on,
not use directly.
When deploying to a production environment, please refer to the Helm Repository
for FIWARE Components in order to scale up to a proper architecture:
see: https://github.com/FIWARE/helm-charts/
Perhaps the most relevant factor here to answer your question, there is typically no Volume Persistence - the tutorials clean up after themselves where possible to avoid leaving data on a user's machine unnecessarily.
If you have lost all your entity data when connecting to Orion, my guess here is that the MongoDB database has exited and restarted for some reason. Since there is deliberately no persistent volume set up, this would mean that all previous entities are lost on the restart.
A solution on how to persist volumes and fix this behaviour can be found in answers to another question on this site - something like:
version: "3.9"
services:
mongodb:
image: mongo:4.4
ports:
- 27017:27017
volumes:
- type: volume
source: mongodb_data_volume
target: /data/db
volumes:
mongodb_data_volume:
external: true
I am looking for a way to install AppDynamics in a OpenShift Cluster.
Unable to find proper documentation on how to install and what tools need to be installed.
Should My Application Docker file also include any images related to AppDynamics
If anyone familiar with this please share some steps or provide reference to documents.
Old docs: https://docs.appdynamics.com/22.2/en/infrastructure-visibility/monitor-containers-with-docker-visibility/use-docker-visibility-with-red-hat-openshift
New Docs: https://docs.appdynamics.com/22.2/en/infrastructure-visibility/monitor-kubernetes-with-the-cluster-agent
Note that there is not a prescribed way to instrument as such, you need to make some decisions.
i.e. (from the second doc link):
The first decision is to use the officially released pre-built
Appdynamics Operator images published on DockerHub and Redhat
Registry or If you want to build a custom Appdynamics Operator image.
See Build the Custom Cluster Agent Image.
The second decision is whether to use the officially released
pre-built Cluster Agent images published on DockerHub and Redhat
Registry or If you want to build a custom Cluster Agent image. See
Cluster Agent Container Image.
The third decision is whether to install the Cluster Agent using the
Kubernetes CLI or the Cluster Agent Helm Chart. See Install the
Cluster Agent with the Kubernetes CLI and Install the Cluster Agent
with Helm Charts.
Hello every one i just want to know is it possible to use my local docker image for containers in redhat openshift online free trial version https://www.openshift.com/trial/ (the one that has test drive over it)? As far as i have searched there are some solutions but that dont seem to work with this openshift online free trial, also i want to know why am i bening asked to enter password again in the profile form when i try to install openshift cli?
Refer to this awesome youtube video, I was able to successfully deploy my local docker image onto the dedicated openshift platform's docker registry with the help of this: Push local docker images to openshift registry - minishift
For deploying from local system you may need to do similar steps, only thing that would be slightly different is that in the video he has a local instance, whereas you would be referring to the online openshift cluster. You would be logging into the docker registry of the online openshift cluster from your local system using the oc cli.
Hope it helps.
I need to install a new linux server on a vps, for using mysql, apache, php and some php appications.
In the future i might need to move this server to an other machine ( for example when i want to move the vps to a machine of my own in collocation).
I understand that with Docker, it is possible to just copy to whole server installation to another machine, without the need to reinstall everything.
But what is the most easy way to do this? What action do i need to when installing the new server? I guess i need to install Linux and the rest in a Docker installation. But i am not sure. Does anyone know a step by step guide?
I am new to Docker. I get overwhelmed with all the tools on How to scale Docker containers in production.
I want to use Plesk as well. Plesk supports Docker. Perhaps is that an easy way to go.
1) Create Dockerfile in which you describe actions that you need to do on image, you can find examples in offical documentation https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
2) Build image from Dockerfile
3) Register on docker hub
4) Push your image to docker hub
5) When you setup new server you just need to pull your image from hub
What's the difference between OpenShift and Kubernetes and when should you use each? I understand that OpenShift is running Kubernetes under the hood but am looking to determine when running OpenShift would be better than Kubernetes and when OpenShift may be overkill.
In addition to the additional API entities, as mentioned by #SteveS, Openshift also has advanced security concepts.
This can be very helpful when running in an Enterprise context with specific requirements regarding security.
As much as this can be a strength for real-world applications in production, it can be a source of much frustration in the beginning.
One notable example is the fact that, by default, containers run as root in Kubernetes, but run under an arbitrary user with a high ID (e.g. 1000090000) in Openshift. This means that many containers from DockerHub do not work as expected. For some popular applications, The Red Hat Container Catalog supplies images with this feature/limitation in mind. However, this catalog contains only a subset of popular containers.
To get an idea of the system, I strongly suggest starting out with Kubernetes. Minikube is an excellent way to quickly setup a local, one-node Kubernetes cluster to play with. When you are familiar with the basic concepts, you will better understand the implications of the Openshift features and design decisions.
OpenShift includes a distribution of Kubernetes, so if you don't need any of those added features of OpenShift you can choice to ignore them such as: Web Console, Builds, advanced deployment models and much, much more.
Here's a summary of items available on the OpenShift website.
Kubernetes comes with Ingress Rules but Openshift comes with Routes
Kubernetes has IngressController but Openshift has Router as HAProxy
To swtich namespace in cli for openshift is very easy but in
kubernetes you need to create contex and switch between context
Openshift UI has more interactive and informative then Kubernetes
To bake docker image inside Openshift has BuildConfig but kubernetes
don't has any thing you need to build image and push to registry
Openshift has Pipeline where u don't need any jenkins to deploy any
app but Kubernetes don't has.
The easiest way to differentiate between them is to understand that while vanilla K8S is community project, OpenShift is more focused towards making it a enterprise ready product. Resources like Imagestreams, BC, Builds, DC, Routes etc along with leveraging functionalities like S2I, Router etc make it easier for Developers and admin alike to use OCP for development, deployment and lifecycle management. You can refer to the URL https://cloud.redhat.com/learn/topics/kubernetes/ for getting more information on key differences between them.
OCP makes your life much easier by giving easy actions using CLI command OC and fine grained webconsole.
You can try OCP and get first hand experience of the features using https://developers.redhat.com/developer-sandbox
where you can quick get access to sandboxed environment in a shared cluster.