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Docker for Mac with Kubernetes

docs.docker.com

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Re: Docker for Mac with Kubernetes

#31

Post by eicnix »

watoc wrote: post #30
stephenr wrote: post #22

I don't understand the use-case here. You want to use Docker+Kubernetes but can't work out the bits to run it in VM's on your own?

If you need to experiment with k8s locally it's pretty easy to install Kubernetes in one or 2 VMs on your laptop with kubeadm but then you need to install Docker inside this VM. Minikube is also installing another Docker daemon inside their own VM. Because I already have Docker for Mac installed to be able to build and test images I think it's useful to have this local k8s integration.

minikube is still my default for running a local kubernetes instance since it supports more customisation of the k8s settings.

Re: Docker for Mac with Kubernetes

#32

Post by xorcist »

sz4kerto wrote: post #13
pacavaca wrote: post #2

Wow! Did Docker give up swarm? I thought there was a time when Docker didn't like the existence of k8s all that much. Anyways, I envision this being very useful for development, may even replace my docker-compose based test setup.

No, it didn't. Yes, k8s has 'won' in large-scale deployments, but if you're working at a small shop, then just imitating what Google does with millions of servers is dumb. Do what works at your scale -- and Swarm is extremely easy to manage. Many people ask why would someone use an orchestrator on a small cluster (dozens of hosts). Why not? Swarm is very easy to manage and maintain, using Puppet or Ansible is not les…

> Swarm is very easy to manage and maintain, using Puppet or Ansible is not less complicated

The idea that dockerized software somehow is less dependent on configuration management seems to be a popular and completely misguided one. The two trends are completely separate, but I would argue from experience that unless you have absolutely nailed the configuration and integration of all your moving parts, don't even look at containers yet.

Containers tend to lead to more moving parts, not less. And unless you know how to configure them, and perhaps even more importantly how to test them, that will only make matters worse.

Re: Docker for Mac with Kubernetes

#33

Post by zenlikethat »

StavrosK wrote: post #26
sz4kerto wrote: post #25

Earlier quoted context omitted.

If you're paying for EE, then UCP can do a lot for you. We're using the HRM heavily, and it's very handy.

I don't know what any of those mean :(

EE = Enterprise Edition

UCP = Universal Control Plane (web app to manage clusters and containers)

HRM = Host routing mesh (I think). If I recall correctly, it’s used to control ingress to the cluster via virtual host routing, etc.

They are paid Docker Inc. products. I worked for Docker once upon a time so I’m happy to hear there are happy customers :)

Re: Docker for Mac with Kubernetes

#34

Post by zenlikethat »

stephenr wrote: post #22

I don't understand the use-case here. You want to use Docker+Kubernetes but can't work out the bits to run it in VM's on your own?

Running Kubernetes locally isn’t really trivial. I feel like this makes a clicky clicky install a lot more possible and opens the doors to more people. And that’s what Docker’s been good at since day one, democratizing otherwise esoteric technologies.

Re: Docker for Mac with Kubernetes

#36

Post by zygimantasdev »

justincormack wrote: post #18
perceptronas wrote: post #4

Docker for Mac is not usable today, because of high cpu due IO [1] [1] https://github.com/docker/for-mac/issues/1759

It is usable for the vast majority of users. If it is causing an issue please file a detailed bug report, with diagnostic ID, also try the Edge releases, and give some information about what you are actually running, for example how to replicate it. Most of the bug reports in that thread are totally unhelpful. Quite likely it is not even the same cause for different people, as some people said it was fixed on Edge wh…

Are you sure it works for vast majority of users? At least in my developers circle who use macOS for web* development - all of them have issues with docker high cpu usage due IO. Some use docker-sync to go around the issue.

As for bug reports - zero feedback from anyone on that thread from maintainers. If you are one of the maintainers - it might be good to write this comment on that thread instead of HN

* - I understand that web developers might be a small percentage of users and my case doesn't represent everybody

Re: Docker for Mac with Kubernetes

#37

Post by StavrosK »

zenlikethat wrote: post #33
StavrosK wrote: post #26

Earlier quoted context omitted.

I don't know what any of those mean :(

EE = Enterprise Edition UCP = Universal Control Plane (web app to manage clusters and containers) HRM = Host routing mesh (I think). If I recall correctly, it’s used to control ingress to the cluster via virtual host routing, etc. They are paid Docker Inc. products. I worked for Docker once upon a time so I’m happy to hear there are happy customers :)

Ah I see, thank you for clarifying! I'm not familiar with the products, but I'll research them.

Re: Docker for Mac with Kubernetes

#38

Post by alexellisuk »

I normally used minikube for openfaas development - I appreciate the efforts of the project, it's an invalueable tool. The DfM integration works very well for local development and I've got some screenshots below:

https://twitter.com/alexellisuk/status/949595379326210048

Make sure you do a context-switch for kubectl too.

I see some people talking about Swarm vs Kubernetes. Swarm has always maintained a less modular approach which made it simpler to work with - it's obviously not going anywhere since there are customers relying on it in production.

Out of the two it's the only one that can actually fit into and run on a Raspberry Pi Zero because K8s has such high base requirements at idle in comparison. For a better comparison see my blog post - https://blog.alexellis.io/you-need-to-know-kubernetes-and-sw...

Re: Docker for Mac with Kubernetes

#39

Post by alexellisuk »

justincormack wrote: post #18
perceptronas wrote: post #4

Docker for Mac is not usable today, because of high cpu due IO [1] [1] https://github.com/docker/for-mac/issues/1759

It is usable for the vast majority of users. If it is causing an issue please file a detailed bug report, with diagnostic ID, also try the Edge releases, and give some information about what you are actually running, for example how to replicate it. Most of the bug reports in that thread are totally unhelpful. Quite likely it is not even the same cause for different people, as some people said it was fixed on Edge wh…

I have 60-65% CPU usage at idle - it's not ideal for battery life but it is usable and I'd say it's easier to use than minikube (which is something that I also use a lot). This is very early for DfM + K8s - I'd say the usability outlays teething issues.

If you want to help send in diagnostic reports for the Docker guys.

Re: Docker for Mac with Kubernetes

#40

Post by nikcub »

perceptronas wrote: post #4

Docker for Mac is not usable today, because of high cpu due IO [1] [1] https://github.com/docker/for-mac/issues/1759

I run 10-15 containers on my Mac and don't notice it after fixing particular containers (I don't doubt there is a more general issue)

Find out what is causing the CPU spikes with

    docker stats
or screen into the Docker for Mac VM and diagnose with top etc.

    screen ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/tty
I found particular containers were causing the issues and fixed it with alternate builds, prior versions or resource limitations on containers

Docker for Mac/Windows is a great product - it has allowed me to roll out Docker to developers who wouldn't otherwise deal with Vagrant or other solutions

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