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Dissatisfied with Docker

robert.ocallahan.org

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131–140 of 229 posts

Re: Dissatisfied with Docker

#131

Post by ay »

jordanthoms wrote: post #66
bob1029 wrote: post #44

What's wrong with booting a VM off a standardized base image (e.g. an AMI), and then applying simple deployment scripts for each application you need to run? You could probably replicate 90% of the justification for using docker with some basic scripting. git clone https://github.com/myprofile/my-cool-app cd my-cool-app chmod +x deploy.sh ./deploy.sh That's it. The above script would be responsible for getting your a…

That approach works, but if you are going to go into production with it you might need to support: - Rollbacks - Automatic deployment of new releases from CI, rolling releases - Healthchecks, detecting if/when the server exits and making sure that VM gets killed - Canary deployments - Autoscaling (could use an autoscaling instance group for it, but what if you need to scale based on other metrics) - Log aggregation -…

What about hashicorp’s nomad ? In my experience it does pretty much all of the above at a fraction of the complexity...

Re: Dissatisfied with Docker

#132

Post by semerda »

thosakwe wrote: post #15
aledalgrande wrote: post #8

These are real problems with docker, but do we wanna talk about docker for Mac? A total performance disaster. https://github.com/docker/for-mac/issues?q=is%3Aissue+is%3Ao...

I have no idea how, but Docker for Mac was taking up a whopping 65GB of space in one of the cache folders in ~/Library, although I had uninstalled it months ago. I wish I had taken a screenshot, but I was honestly dumbfounded. I had used it maybe once, ever. EDIT: It turns out I’m not making this up/an edge case, at least 940 people have run into this too: https://github.com/docker/for-mac/issues/371

Yap I confirm. 64 GB on my mac.. what da! Proof: https://www.flickr.com/photos/semerda/48720232588/

Re: Dissatisfied with Docker

#133

Post by semerda »

wp381640 wrote: post #79
etimberg wrote: post #33

Earlier quoted context omitted.

I have that problem too. Solution seemed to be to set up an alias to clean out old images, volumes, etc and run that every so often

those scripts are now built into docker with `docker system prune`

Little changed after I ran this script. My ~/Library/Containers/com.docker.docker/ is a whopping 64.01 GB.

Running 'docker system prune' only recovers: Total reclaimed space: 1.986GB

But when I check ~/Library/Containers/com.docker.docker/ for size after prune it still says 64.01 GB.

Am I doing something wrong or is 'docker system prune' useless?

Re: Dissatisfied with Docker

#134

Post by jsilence »

dvfjsdhgfv wrote: post #127
neckardt wrote: post #56

I'm surprised nobody is mentioning LXC[1]. I'm by no means a containers expert, but they claim to be more secure since they default to running as non-root. Unlike docker, I had no trouble installing LXC with apt, while with docker I often got an outdated version. I'm now using LXC for all of my basic container applications (self hosting a wiki and a few other sites). [1]: https://linuxcontainers.org/

Because LXC has no marketing money like Docker. For me it's just one of these cool tools I use every day without giving it a second thought.

How is the tooling compared to Docker? Genuinely interested. Are there platforms like Portainer available? Is something like docker-compose possible?

Re: Dissatisfied with Docker

#135

Post by cs02rm0 »

james_s_tayler wrote: post #112
nickjj wrote: post #37

I've been using Docker since 2015ish and the container start up / stop speed is really the only thing that bugs me. Everything else is fine for day to day usage IMO (on Windows and Linux at least) and very much worth the trade offs, but having to wait multiple seconds for your app to start is tedious since it plays such a heavy role in both development and even in production. Each second your app is not running is do…

I take it you've never worked in an enterprise Java shop with a few million line legacy code base deployed to whatever the hell webserver I can't remember the name of right now. Seconds is great in comparison. Minutes, not so much.

JBoss, Websphere? I know that pain, hadn't even occurred to me that anyone would think containers had a slow startup time. Especially as they've often replaced VMs for me.

Re: Dissatisfied with Docker

#136

Post by utopian3 »

TheWizardofOdds wrote: post #119
nickjj wrote: post #37

I've been using Docker since 2015ish and the container start up / stop speed is really the only thing that bugs me. Everything else is fine for day to day usage IMO (on Windows and Linux at least) and very much worth the trade offs, but having to wait multiple seconds for your app to start is tedious since it plays such a heavy role in both development and even in production. Each second your app is not running is do…

The long startup time is somehow what keeps me from really liking Docker. In the end (if I understood correctly), it is supposed to be the go-to tool for serverless architecture. If my serverless function needs more then a second to startup, it's not usable for me. Even the hello-world container, which is only a few kB in size needs roughly a second to startup.

> In the end (if I understood correctly), it is supposed to be the go-to tool for serverless architecture.

You misunderstood. No one calls Docker a “serverless” architecture.

Re: Dissatisfied with Docker

#137

Post by KaiserPro »

A few things that I would add to that list:

o No primitives to deal with secrets.

o Terrible disk handling (aufs was just horrid, overlay2 I think misses the point. device mapper is just, silly)

o poor speed when downloading and uncompressing images.

Of all of them, the most serious is the lack of secrets handling. Basically you have to use environment variables. Yes, you can use docker compose and stuff appears, but thats only useful if you use compose/swarm.

In this day and age, to have secrets as a very distant afterthought is pretty unforgivable.

Re: Dissatisfied with Docker

#138

Post by james_s_tayler »

cs02rm0 wrote: post #135
james_s_tayler wrote: post #112

Earlier quoted context omitted.

I take it you've never worked in an enterprise Java shop with a few million line legacy code base deployed to whatever the hell webserver I can't remember the name of right now. Seconds is great in comparison. Minutes, not so much.

JBoss, Websphere? I know that pain, hadn't even occurred to me that anyone would think containers had a slow startup time. Especially as they've often replaced VMs for me.

WebLogic.

Re: Dissatisfied with Docker

#140

Post by FreeHugs »

neckardt wrote: post #56

I'm surprised nobody is mentioning LXC[1]. I'm by no means a containers expert, but they claim to be more secure since they default to running as non-root. Unlike docker, I had no trouble installing LXC with apt, while with docker I often got an outdated version. I'm now using LXC for all of my basic container applications (self hosting a wiki and a few other sites). [1]: https://linuxcontainers.org/

How do you create an image for LXC?

With docker, they have the docker.io service with all types of distros you can chose from.

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