@ealeyner

Tech & AI @Docker, ex: co-founder at @AtomicJarInc (acquired by @Docker), @VMwareTanzu, @pivotal, @AWS and @Microsoft

Joined April 2007
  • Tweets4.5K
  • Following2.8K
  • Followers3.3K
171Media
Harbor 🤝 Docker Sandboxes
Docker
@DockerOct 15
Agents that can edit files and run commands can also game their own evals. Harbor + Docker Sandboxes fix that: every eval task runs in an isolated microVM, with network policies for fair, reproducible runs. bit.ly/4B8xf9Z
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Software factories are popping all-over. Today’s problem is securing them. Our reference architecture sets four boundaries (sandbox, network, supply chain, identity and access) enforced outside the agent. With @ianlivingstone @vtahowe @AhmadNassri @williammanning
Docker
@DockerOct 13
Agents are building software. Who's securing the factory? Agent Baseline participants publish a reference architecture for securing agentic software factories, with controls enforced by the environment, not the agent. Learn more in the white paper → bit.ly/4dxr05M
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The capabilities that make an agent useful are the same ones that dissolve the walls around it. The boundary has to be deterministic. Applying this to software factories. Show & tell Oct 13 NYC with @irlivingstone @AhmadNassri @dickhardt @zacharydhamilton moderated by @vtahowe 👀
Insecure Agents Podcast
@insecureagentsOct 7
"You can argue that a developer working in your organization has morals. It is very difficult to argue that an agent does." - @ealeyner VP Product Strategy @Docker Constrain is 1 of 6 Agent Baseline outcomes, and Eli's applying it to something bigger. Out soon 👀
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We'll dig into this live in NYC on Oct 13 after @aiDotEngineer with @ianlivingstone, @AhmadNassri, @ealeyner, @DickHardt, @braintrust, @Docker, @SocketSecurity, @KeycardAI At Elsie Rooftop with food and drinks 🥂✨🗽 luma.com/keycard-rg1c
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36h trip to Amsterdam for AGNTCon . Double red-eye. Just practice for @HackTheNorth. If I'm judging a 36-hour hackathon where everyone's pulling all-nighters, only fair I show up having done my own 🤣 Come find me — I'll be the one with the extra large coffee.
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Astra launch is genius positioning. Model is clearly an advance in coding,etc.. but the marketing, demos and public videos showcase computer-use.. (while never mentioning it by name)
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Agents are making the news for escaping sandboxes so we asked @ealeyner, VP Product Strategy at @Docker, what it takes to contain an agent. His answer, in summary, is it requires defense in depth. Worth a listen if you're looking to put your agent in a box and keep it there.
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Someone should have told me not to argue about morals in Sin City - on the stage of Marquee nightclub 🤣 - i did it anyway.
Docker
@DockerAug 6
"A developer has morals. It's very difficult to argue that an agent does." @vtahowe & @ianlivingstone (@KeycardAI) @ealeyner (Docker), and Ezra Tanzer (@snyksec) on agent identity, delegation patterns and what real governance looks like when agents are delegating work to other agents: Watch the full panel: youtube.com/watch?v=Da-GgBgm…
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Amazing to see all the success of @jmorgan and @mchiang0610 - what a rocketship they built at @ollama
ollama
@ollamaJul 9
Big day for Ollama! When we started, open models and the open source AI ecosystem were in their early days with few believers. Our belief in open source has never wavered. With today's fundraising announcement and our 9M+ active builders, we’re ready to scale open models into AI that you can own. All aboard open models! 🧵
Ollama is here to accelerate open models!

ALT Ollama is here to accelerate open models!

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End of an Era. Artificial artificial intelligence no longer needed when real AI is decent? Can this mean that my code would finally be retired?
Techmeme
@TechmemeJul 5
AWS says Mechanical Turk will no longer accept new customers and that it is placing the crowdsourcing service in maintenance, signaling its future retirement (@ssharwood / The Register) (Visit Techmeme dot com for the link and full context!)
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Amar has been the quiet GOAT of the Toronto ecosystem for many years! Lucky to be able to call @avarma for his advice - he always picks up, cares and dispenses wisdom generously. Thank you for your friendship @avarma and for all you do.
Evan McCann
@evansammccannMay 14
For years, @avarma has been one of the most important people in Toronto tech without many outside the ecosystem fully understanding why. He helped build Xtreme Labs. Autonomic sold to Ford. Xtreme’s story even brushes up against Tinder. He has been described as “sort of the king of Toronto.” Others put it more bluntly: “What people don’t realize is that he was carrying Toronto and KW tech on his back.” Now, with Mantle, he is building again. My profile:
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Eli Aleyner retweeted
Harley Finkelstein
@harleyfMar 3
This is exactly what I wrote about. Jews are being targeted simply because they are Jewish. Not politics. Not policy. Just identity. If that doesn’t alarm you, you’re not paying attention. Or you’re choosing not to. nationalpost.com/opinion/can…

Harley Finkelstein: Canadian Jews are being targeted simply because they are Jewish

nationalpost.com
David Frum
@davidfrumMar 3
The synagogue I attended as a boy and youth, where I was bar mitzvah'd and received my primary Jewish education, now under gunfire in once-peaceable North York, Ontario.
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Eli Aleyner retweeted
The New Stack
@thenewstackFeb 25
The 3Cs: A Framework for AI Agent Security from @Docker, by @ealeyner @srinisekaran docker.com/blog/the-3cs-a-fr…

The 3Cs: A Framework for AI Agent Security | Docker

Learn from Docker experts to simplify and advance your app development and management with Docker. Stay up to date on Docker events and new version

docker.com
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Eli Aleyner retweeted
Warp
@warpdotdevFeb 10
Introducing Oz: the platform to orchestrate agents in the cloud. Spin up hundreds of agents from your terminal, browser, the API, or your phone. Each agent gets a @docker environment to build, test, and write PRs. Come back from your lunch break to code that’s ready to merge.
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Do you leave your unlocked laptop unattended at a coffee shops? Yet, this is what we do when we run AI agents in yolo mode.. 3Cs is a framework of how to think about AI Agent security: Contain, Curate, Control -> docker.com/blog/the-3cs-a-fr…
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I Am a Proud Jewish Canadian. This Is What Has Changed.
National Post
@nationalpost31 Dec 2025
Harley Finkelstein: Canadian Jews are being targeted simply because they are Jewish nationalpost.com/opinion/can…
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We’re partnering with @Docker to make software development safer for everyone! Socket Firewall Free is now bundled into Docker Hardened Images, adding build-time and dependency-install supply chain protection for @nodejs, @ThePSF, and @rustlang socket.dev/blog/socket-firew…

Socket Firewall Now Available in Docker Hardened Images

Socket Firewall Free is now bundled into Docker Hardened Images, adding build-time and dependency-install supply chain protection on top of hardened base images for Node.js, Python, and Rust.

socket.dev
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Docker is changing the game. Starting today, the Full catalog of (over 1000) Docker Hardened Images is FREE for All. Base Images, Helm Charts, MCP Servers, all of it. No gimmicks, no trials. Free, Apache2. 🎉
Docker
@Docker17 Dec 2025
🎁 What’s on your dev wishlist? How about secure, production-ready base images… free and open source?! Docker Hardened Images are now free for everyone, & backed by an Apache 2.0 license. Read more: bit.ly/4rYoCKI #DHI #OpenSource
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Longer agent tasks depending on Testing to be effective as per @pirroh - 🧐 as described at #aiecode
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Eli Aleyner retweeted
.NET
@dotnet31 Oct 2025
Mocks are fine… until they lie. 😅 Enter Testcontainers: run real services in containers for integration tests that actually reflect production. Your tests deserve better—learn how 👉 msft.it/6018t6zcG #DevOps meets reality ✅
read.ise.blog ( ) ; Integration Testing with Testcontainers Walk through using them with .NET INTEGRATION TESTING TESTCONTAINERS C# .NET COSMOS DB EMULATOR

ALT read.ise.blog ( ) ; Integration Testing with Testcontainers Walk through using them with .NET INTEGRATION TESTING TESTCONTAINERS C# .NET COSMOS DB EMULATOR

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