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Open Container Initiative

OCI Member Spotlight: EasyStack

By Blog

The OCI community is comprised of a diverse set of member companies that are committed to creating open industry standards around a container image format and runtime. This blog series highlights OCI members and their contributions to building an open, portable and vendor neutral specification.  

Name: Guohui Liu
Title: Co-founder and CTO
Company: EasyStack

Why did you join OCI?
Trends in cloud native computing are still on the rise. Businesses are evolving faster than ever before as applications require more agile and scalable infrastructure, and container technology is right at the center of it all. Unified standards are imperative for container technology to evolve and develop, with input and participation from the entire ecosystem. We believe the Open Container Initiative (OCI), with its runtime and image format specifications, plays a leading role in actualizing the ability to “package once, run anywhere” for applications.

Openness is a part of EasyStack’s DNA. We believe container technology will fill the gap between traditional IT and cloud native IT. We are among the first to release a converged infrastructure cloud platform featuring both containers and OpenStack cloud, and are looking forward to sharing our rich experiences with enterprise cloud native infrastructure offerings with the global OCI community.

How is your organization involved in OCI?
EasyStack is an active participant in the broader open source community, and we believe it is equally important to contribute to upstream open source projects to help address enterprise customer needs. Today — based on OpenStack, Kubernetes, Docker, Ceph and other open source technologies– EasyStack provides an open, secure, stable, reliable, and high-performance cloud computing capability for 200+ enterprise customers for their cloud infrastructure. As part of OCI, we are sharing our enterprise cloud and application model experience with the upstream community.  

What are the aspects of the runtime spec and/or image format spec that you are looking forward to most for your company?
The runtime spec and image format spec provide container standards, which is very important to both vendors and users. Trends in cloud native are encouraging more and more enterprise users to deploy containers, and many of them are already in production. This means reliability and consistent upgrades are extremely important. Additionally, API compatibility and scalability is imperative, especially in customized enterprise scenarios.

How do you plan to use the runtime spec and/or image format spec?
We leverage OCI v1.0 the runtime spec in our ESContainer Linux already, providing a reliable and stable container runtime. This allows us to focus on the development of true application-oriented orchestration, leveraging additional technologies such as Kubernetes.

How will these specifications help your business?
These specifications provide standardized and reliable image format and runtime specifications, allowing us to better and more efficiently develop ESContainer, shortening the development cycle. With these standards, the infrastructure provided by different vendors is of the same API so this avoids vendor lock-in, which helps our business to reduce risk (as well as costs, which in turn yields higher profits).  

What do you believe the benefits of using a runtime and image spec based on the OCI standard are for hosting providers?  For small ISVs, application developers? For end users?
OCI’s runtime and image format specs help all types of customers. The use of one standardized spec enables container applications to be deployed, run, and updated in a multi-cloud environment (e.g. public cloud, private cloud or community cloud) more quickly and efficiently. This is extremely helpful in today’s hybrid cloud environment and both the hosting providers and the end users will benefit from it.

ISVs and application developers now have standards to follow, which can help reduce the risk of going in the wrong direction while avoiding vendor lock-in as they build container applications.

What advice would you give to someone considering joining OCI?
If you and/or your organization’s vision align with current cloud native trends, just join OCI. Today, it is almost impossible for one company to really dominate one hot technology and at the same time keep it active and advanced. Open technologies have proven successful for rapid development, and OCI is a great example of this. New members to the OCI community can get started quickly with shared resources and support from across the community, in addition to having fun by contributing back.

Open Container Initiative (OCI) Releases v1.0 of Container Standards

By Announcement

Open, portable, vendor-neutral container specifications now available  

SAN FRANCISCO, Calif. – 19 July, 2017 ​– The Open Container Initiative (OCI), an open source community for creating open industry standards around containers, today announced the debut release of its container runtime and image format specifications, comprised of Runtime Specification v1.0 (a specification for defining the lifecycle of a container) and Image Format Specification v1.0 (a specification for the container image format). Combined with efforts to create a formal certification program later this year, OCI is bringing a set of common, minimal, open standards and specifications around container technology to a reality.

OCI v1.0 specifications lay the foundation for container portability across different implementations to make it easier for customers to support portable container solutions. The OCI will launch a certification program shortly such that different implementations can demonstrate conformance to the specifications.

“The v1.0 release of the OCI specifications is a huge milestone for both the container community and the industry at large,” said Chris Aniszczyk, Executive Director, OCI. “By creating these open, accessible specifications, along with early deployments, we are bringing the industry closer to portability and standardization. This is no small feat, and I am incredibly proud of the OCI community for all the hard work that went into this release.”

The initial release comes following an integrated and collaborative effort among a diverse community made up of individual contributors and disparate organizations, including  the project’s over 40 member organizations. Formed in June of 2015, the OCI was launched with the express purpose of developing vendor neutral container standards that provide the industry the ability to fully commit to container technologies today without the fear of lock-in. OCI began with a specification describing container runtime behavior and expanded a year later to include a container image specification. Since then, the community has also worked on projects including runtime-tools and image-tools, go-digest, and selinux.

While v1.0 represents a great deal of progress, marking a readiness for serious commercial adoption, there is still work to be done. The OCI community will be launching a formal certification program later this year while active and ongoing work is underway in terms of additional platform support and potential to add additional specification functionality or projects.  

More information about the Runtime Specification v1.0 is available at and details on the Image Format v1.0 Specification can be found here:

To learn about becoming involved with the OCI, visit here for details on the developer community, here to join as a member or participate in the upcoming certification program.

Thanks to the OCI Community
The release would not be possible without the hard work and dedication of the numerous maintainers of the runtime and image format specs: Vincent Batts, Jonathan Boulle, Jason Bouzane, Brendan Burns, Michael Crosby, Daniel Dao Quang Minh, Stephen Day, Tianon Gravi, Qiang Huang, Rohit Jnagal, Vishu Kannan, Mrunal Patel, Brandon Philips, and John Starks. We are also extremely grateful to the additional maintainers across the OCI: Chris Aniszczyk, Liang Chenye, Rob Dolin, Zhou Hao, Lei Jitang, Xie Keyang, Victor Marmol, Aleksa Sarai, Ma Shimiao, Andrey Vagin, and Stephen Walli. We would also like to thank our 250+ contributors across the wider OCI community.

Comments from Contributing Members

“The establishment of an open standard is an essential step toward an unprecedented level of automation and portability that containers deliver to enterprise users,” said Daniel Nurmi, CTO of Anchore, Inc. “With the release of the OCI 1.0 specification, Anchore can deliver even more focused and stable security, certification and validation systems optimized for containers, giving our customers the confidence, transparency and choice that only open standards and tools can provide.”

Dell Technologies
“The promise of many significant technologies has been cut short by competing standards” said Barton George, Senior Architect, Office of the CTO, Dell Technologies. “Being keenly interested in advancing technologies for our customers, Dell Technologies is encouraged by the common and open standards that the OCI’s v1.0 specifications allow. This specification ensures that containers continue as a key enabler of the Cloud-native applications that allow businesses to react to, and deliver on, customers’ needs in the era of digital transformation.”

“From the initial commit to runc to building the Open Container Initiative (OCI) with a broad coalition of container industry leaders in 2015, Docker has been steadfastly committed to driving a basic standard that can serve as a building block for the broader industry,” said Patrick Chanezon, Chief Developer Advocate for Docker. “Today marks an important milestone for the OCI with the release of OCI v1.0 specifications, a standard that is implemented by the components within the Docker platform – runc and containerd. The OCI is a basic format that when combined with other key components such as LinuxKit, Notary or InfraKit, enables Docker to build a secure, reliable and easy-to-use container platform that serves our user requirements across Linux, Windows or mainframe, on prem or across multiple clouds.”

Cloud Foundry Foundation
“Cloud Foundry believes that an industry standard for container images is critical to the interoperability of cloud-native application platforms. As a very early adopter of the runC library from OCI, we are extremely excited about the launch of OCI v1.0,” said Chip Childers, CTO, Cloud Foundry Foundation. “Cloud Foundry officially adopted runC as the primary container runtime library for Linux-based nodes in October of 2016 and we’re actively planning the adoption of the OCI Image Specification within the Cloud Foundry platform.”

“CoreOS started the conversation years ago on the container image and runtime specification, and today we are thrilled to have worked alongside the major leaders across the industry to create a stable OCI 1.0,” said Brandon Philips, Chair of the OCI Technical Oversight Board and CTO of CoreOS. “With the OCI Runtime Spec, and more importantly, the OCI Image Format Spec, at 1.0 and now mature for broad use, users can expect the OCI to help stabilize a growing market of interoperable, pluggable tools, and should gain confidence that containers are here to stay. And we are actively working with the Kubernetes community to bring this v1.0 OCI release to a future release.”

“It’s great that the OCI specification 1.0 release is now available,” said Katsue Tanaka, Senior Vice President and Head of Platform Software Business Unit, Fujitsu Limited. “A widely adopted solid specification is important for evolving container solutions and creating an ecosystem. Container technologies help us decouple applications and platforms; applications based on the standard container spec achieve portability across clouds and on-premises. The OCI spec will drive our cloud business towards a more digital business platform through sustainable standardized application deployment technologies.”

Google is appreciative of all the work that goes into open source and open specifications. The OCI v1.0 standards represent countless hours of cross industry collaboration which further enable containers as the unit of portable application workloads.” said Sarah Novotny, Lead Open Platforms Program Manager, Google. “We’re working to implement OCI v1.0 with the Kubernetes community as well as in Google Container Registry, Container Builder, and Container Engine. Our goal is to provide end-to-end OCI support from build to registry to runtime in GCP benefiting our users and ecosystem.”

“As a leading contributor to OCI, Huawei is pleased to see the release of OCI v1.0 image format and runtime specifications, which we’ll implement into our FusionStage container solution,” said Xiaoli Jiang, General Manager of Huawei OpenStack & Container Open Source Ecosystem. “This set of common, open, and neutral container specs will help the entire container ecosystem, including aiding enterprises in focusing even further on container technologies that bring added value.”

“From the development of LXC with the Linux community in 2008, to now the establishment of the OCI v1.0 specification in 2017, the evolution of container technology has marched forward and reached a significant milestone” said Todd Moore, VP Open Technology, Digital Business Group, IBM. “We believe the OCI v1.0 runtime and image format specifications represent the next advancement along the path towards interoperable open cloud technologies, and we are actively planning the use of OCI conforming containers as part of our IBM Bluemix Container Service.”

“At Intel, we believe in open source development and open standards, and for nearly two decades the Intel® Open Source Technology Center has advanced projects across markets and at every point of the solution stack to help ensure everything running open source runs best on Intel® Architecture,” said Imad Sousou,Vice President and General Manager of the Open Source Technology Center at ‎Intel Corporation. “We are excited to see OCI releasing 1.0, to have collaborated with the industry on this specification, and to have Intel® Clear Containers ( support this.”

“At Mesosphere we’re committed to open source projects like OCI and we’re particularly excited to work with the developer and enterprise community to embrace the v1.0 specification,” said Benjamin Hindman, Founder of Mesosphere and Co-Creator of Apache Mesos. “We plan on fully supporting OCI in DC/OS, an open source project we founded over a year ago to bring the power of Mesos to the broader community. We’ve had more than 100,000 clusters launched with DC/OS and we’re excited about bringing OCI to those users. We’re especially excited to see how OCI and the Container Storage Interface (CSI), a project we helped spearhead to provide a standard for container orchestration solutions, will work together. We truly believe the power of open source projects like OCI, CSI, and CNI will pave the way for the next generation of computing innovation.”

“Open standards like OCI are very important to Microsoft as they help ensure portability and interoperability of containers across platforms and operating systems,” said Taylor Brown, Principal Lead Program Manager for Windows containers. “The OCI specification has provided a much-needed containers standard, for which operating systems like Windows and Linux can standardize platform support. Containers are now ubiquitous allowing developers across all platforms to depend on them for powering their current and future applications.”

“Standards are vital for enterprise adoption and support. The 1.0 release of the OCI image and runtime specs is a milestone that marks the transition of containers from early adopters to mainstream businesses,” said Vish Abrams, Cloud Development Architect. “Oracle is proud to have participated in the creation of these specs and to have open sourced some of the first software to support them. We look forward to continuing to contribute to container standards in the future through the OCI and our open source projects.”

“Interoperability and portability are essential elements to the Pivotal ecosystem,” said James Bayer, Vice President of Product, Cloud Foundry at Pivotal. “With the new OCI specification, developers and partners will have confidence that their software will run unchanged. This helps Pivotal Cloud Foundry customers and partners support more workloads on a common platform that works the same on-premises and in public clouds.”

Rancher Labs
“Finalization of the 1.0 container standards is a great milestone for the technology and for our users.  The vast variations in implementation have complicated container usage,” said Darren Shepherd, Co-Founder and Chief Architect, Rancher Labs. “These container standards are the cornerstone of industry-wide efforts to ensure that containers remain portable and able to serve as a ubiquitous component of distributed applications, and we are pleased to have been able to play a role in their development.”

Red Hat
“The potential of Linux containers is significant for the enterprise world, from increased application portability to simply delivering better code faster, but the risk of technology fragmentation at the format level is a scary prospect for organizations that are looking to base their next decade-plus of innovation on containerized applications,” said Chris Wright, Chief Technologist, Office of Technology, Red Hat. “Just as Red Hat helped standardize Linux, making it a reliable foundation for mission-critical operations, the Open Container Initiative, with the launch of the OCI 1.0 runtime and image format specs, is aiming to do the same for Linux containers within the enterprise. Red Hat is pleased to be an active, vocal, supportive member of this effort to help enterprises more fully and confidently embrace the promise of Linux containers.”

“SUSE believes standards are extremely important to establishing consistency across different environments, and we look forward to contributing to the full runtime and image format potential of OCI 1.0,” said Michal Svec, Senior Product Manager, Virtualization and Containers, SUSE. “Containers are key to the future of cloud computing, and SUSE is deeply involved with open container and image standards, using them to address developer and enterprise customer needs.”

“Standards allow our enterprise customers to protect their investments in technology and help to ensure interoperability,” said Rob Lalonde, VP and General Manager of Navops by Univa. “Having a standardized container format and run-time specification will help the ecosystem to move much more quickly in building tools and solutions in the layers above. Conversely, the lack of a specification would slow down developers who then have to support multiple formats and runtimes simultaneously, and would greatly slow end-user adoption. We welcome OCI 1.0!”

“Enterprise organizations investing in cloud-native initiatives expect their applications to simply work on-premises or in the cloud,” said Paul Fazzone, Vice President and General Manager, Cloud-Native Apps Business Unit, VMware. “Today’s initial release of OCI specifications will provide enterprises with peace of mind that they can leverage the promises of interoperability and workload portability. VMware is committed to work with the community to help establish common, open standards and specifications for containers, and will support them across future releases of VMware infrastructure software.”

About the Open Container Initiative (OCI)
The Open Container Initiative is an open governance structure for the express purpose of creating open industry standards around container formats and runtime. Projects associated to the Open Container Initiative can be found at Learn more about joining the OCI community here:

The Open Container Initiative is a Collaborative Project at The Linux Foundation. Linux Foundation Collaborative Projects are independently funded software projects that harness the power of collaborative development to fuel innovation across industries and ecosystems.

About The Linux Foundation
The Linux Foundation is the organization of choice for the world’s top developers and companies to build ecosystems that accelerate open technology development and commercial adoption. Together with the worldwide open source community, it is solving the hardest technology problems by creating the largest shared technology investment in history. Founded in 2000, The Linux Foundation today provides tools, training and events to scale any open source project, which together deliver an economic impact not achievable by any one company. More information can be found at


Additional Resources
Join as a Member
Join the OCI Developer Community
OCI Blog
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Jill Lovato
The Linux Foundation

OCI Member Spotlight: CoreOS

By Blog

The OCI community is comprised of a diverse set of member companies that are committed to creating open industry standards around a container image format and runtime. This blog series highlights OCI members and their contributions to building an open, portable and vendor neutral specification.

Name: Brandon Philips
Title: CTO
Company: CoreOS

The Open Container Initiative serves an important function in the container ecosystem. To us at CoreOS, we are committed to making sure the container ecosystem focuses on standards and security. As a founding member of the OCI, CoreOS is an ardent advocate of the OCI’s mission to establish open industry standards around container formats and runtimes. We are working alongside leaders of the industry to standardize how container images are built, verified, signed, and named. The OCI coalesced around these goals, formed by a strong technical community of industry maintainers dedicated to that mission and provides a platform from which to coordinate our efforts. Together, we have been working to deliver on the promise of “package once, run anywhere” containers. Users can expect increased innovation and interoperability between container registries, build tools, and runtimes.

As maintainers of the OCI image spec, industry leaders and I actively guide and contribute to its development. The OCI will play an important role in standardizing not only the runtime specification, but even more, the container image format specification, paving the way for portable containers that can be deployed on a variety of environments. Benefits include lowering confusion in the container space and reducing the avenues available to vendors to lock clients into an isolated ecosystem. We are committed as an organization to continue expanding, contributing to, and supporting standards; doing so is paramount to developing an open platform. These are key elements in our efforts to provide self-driving infrastructure to all via our CoreOS Tectonic product. As a company founded with open source values, CoreOS’s goals are closely aligned with organizations like the OCI that provide a framework for building an open, portable and vendor neutral specification.

Where we are today: Release candidates and ways to support the standard

Release candidates of the runtime and image format spec have continued to mature, and the container ecosystem has continued to grow. It now is possible to build container runtimes that support the standard. There is a bit of a chicken and egg with working in standards like the OCI; you need both sides of the standard (consumers and producers) for the interoperability to happen. With the support of AWS for example, we can create the ecosystem around it more quickly. This is a big milestone since most products will want to be interoperable with AWS.

The ability to have pluggable components ready to use is crucial for easy adoption. The container infrastructure industry is an emerging market, and new markets have an adjustment period before stabilizing. Before the creation of the OCI, we were seeing a proliferation of competing standards. This ran the risk of increasing confusion and discouraging participation. Our hope is that with the OCI, we can break down walls and prevent further isolation, leading to an influx of new tools and a burgeoning industry.

CoreOS will implement and adhere to the runtime and image format specifications and hopes to help bring compatibility to Kubernetes upstream. Having industry standards means having compatibility across the tools created with those standards. CoreOS is developing the tools needed to build a complete container infrastructure. Ensuring that our products can be used with other tools in the container ecosystem increases our exposure and expands our options with our enterprise solutions as well.

With supporting the standard, end users will know that OCI-compatible tools were built using industry-approved standards, making it easier to know what tools can be used together.

We are excited to see the OCI grow, and having a large and thriving community is the best way to garner interest, foster growth, and develop a strong network of contributors.

Brandon Philips, as cofounder and CTO at CoreOS, is building modern server infrastructure open source projects like Container Linux and enterprise products like CoreOS Tectonic and Quay. Prior to CoreOS, he worked at Rackspace hacking on cloud monitoring and was a Linux kernel developer at SUSE.