5c00024c70
During "join" of new control plane machines, kubeadm would download shared certificates and keys from the cluster stored in a Secret. Based on the contents of an entry in the Secret, it would use helper functions from client-go to either write it as public key, cert (mode 644) or as a private key (mode 600). The existing logic is always writing both keys and certs with mode 600. Allow detecting public readable data properly and writing some files with mode 644. First check the data with ParsePrivateKeyPEM(); if this passes there must be at least one private key and the file should be written with mode 600 as private. If that fails, validate if the data contains public keys with ParsePublicKeysPEM() and write the file as public (mode 644). As a result of this new logic, and given the current set of managed kubeadm files, .key files will end up with 600, while .crt and .pub files will end up with 644.
Kubernetes (K8s)
Kubernetes, also known as K8s, is an open source system for managing containerized applications across multiple hosts. It provides basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If your company wants to help shape the evolution of technologies that are container-packaged, dynamically scheduled, and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
To start using K8s
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To use Kubernetes code as a library in other applications, see the list of published components.
Use of the k8s.io/kubernetes module or k8s.io/kubernetes/... packages as libraries is not supported.
To start developing K8s
The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.
If you want to build Kubernetes right away there are two options:
You have a working Go environment.
mkdir -p $GOPATH/src/k8s.io
cd $GOPATH/src/k8s.io
git clone https://github.com/kubernetes/kubernetes
cd kubernetes
make
You have a working Docker environment.
git clone https://github.com/kubernetes/kubernetes
cd kubernetes
make quick-release
For the full story, head over to the developer's documentation.
Support
If you need support, start with the troubleshooting guide, and work your way through the process that we've outlined.
That said, if you have questions, reach out to us one way or another.