k8s-extensions

ISecL K8s Extenstions

ISecL K8s Extensions which includes ISecL K8s extended scheduler, ISecL K8s custom controller components and certification generation scripts for trusted launch of containers. Key Components:

• ISecL K8s extended scheduler The ISecL Extended Scheduler verifies trust report and asset tag signature for each of the K8s Worker Node annotation against Pod matching expressions in pod yaml file using ISecL Integration hub public key. The signature verification ensures the integrity of labels created using isecl hostattribute crds on each of the worker nodes. The verification happens at the time of pod scheduling.
• ISecL K8s custom controller The ISecL Custom Controller creates/updates labels and annotation of K8s Worker Nodes whenever isecl.hostattributes crd objects are created or updated through K8s kube-apiserver.
• Certificate generation scripts These scripts creates kubernetes hostattributes.crd.isecl.intel.com from which the crd objects will be created for each of the tenant, then it creates the client and server certificates. The client certificate is created for root user and root user will be having RBAC on get,list,delete,patch,deletecollection,create and update operations on the hostattributes.crd.isecl.intel.com.

System Requirements

• RHEL 8.2
• Epel 8 Repo
• Proxy settings if applicable

Software requirements

• git
• makeself
• go version 1.16

Step-By-Step Build Instructions

Install required shell commands

Install tools from yum

sudo yum install -y git wget

Install go version 1.16

The ISecL K8s Extensions requires Go version 1.16 that has support for go modules. The build was validated with the latest version go1.16.6 of go. It is recommended that you use go1.16.6 version of go. You can use the following to install go.

wget https://dl.google.com/go/go1.16.6.linux-amd64.tar.gz
tar -xzf go1.16.6.linux-amd64.tar.gz
sudo mv go /usr/local
export GOROOT=/usr/local/go
export GOPATH=<path of project workspace>
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH

Build ISecL K8s Extenstions

git clone https://github.com/intel-secl/k8s-extensions.git
cd k8s-extensions
make all

Deploy

Pre-requisites

• cffsl
• cfssljson

Install Pre-requisites

   wget http://pkg.cfssl.org/R1.2/cfssl_linux-amd64
   mv cfssl_linux-amd64 /usr/local/bin/cfssl
   wget http://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
   mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

Deploy isecl-controller

• Copy isecl-k8s-extensions.tar.gz output build to /opt/ directory and extract the contents

cd /opt/
tar -xvzf isecl-k8s-extensions.tar.gz

• Load docker images isecl-controller and isecl-scheduler

docker load -i docker-isecl-controller-v*.tar
docker load -i docker-isecl-scheduler-v*.tar

• Create hostattributes.crd.isecl.intel.com crd

cd /opt/isecl-k8s-extensions
kubectl apply -f yamls/crd-1.17.yaml

• Check whether the crd is created

kubectl get crds

• Fields for isecl-controller configuration in isecl-controller.yaml

• Deploy isecl-controller

kubectl apply -f yamls/isecl-controller.yaml

• Check whether the isecl-controller is up and running

kubectl get deploy -n isecl

• Create clusterrolebinding for ihub to get access to cluster nodes

kubectl create clusterrolebinding isecl-clusterrole --clusterrole=system:node --user=system:serviceaccount:isecl:isecl

Fetch token required for ihub installation

kubectl get secrets -n isecl
kubectl describe secret default-token-<name> -n isecl

Deploy isecl-scheduler

• Create a directory for storing certificates

mkdir secrets

• Create tls key pair for isecl-scheduler service, which is signed by k8s apiserver.crt

chmod +x create_k8s_extsched_cert.sh
./create_k8s_extsched_cert.sh -n "K8S Extended Scheduler" -s "$MASTER_IP","$HOSTNAME" -c /etc/kubernetes/pki/ca.crt -k /etc/kubernetes/pki/ca.key

• Copy ihub_public_key.pem from isecl integration hub to secrets directory

• Create kubernetes secrets scheduler-secret for isecl-scheduler

kubectl create secret generic scheduler-certs --namespace isecl --from-file=secrets

• Fields for isecl-scheduler configuration in isecl-scheduler.yaml

• Deploy isecl-scheduler

kubectl apply -f yamls/isecl-scheduler.yaml

• Check whether the isecl-scheduler is up and running

kubectl get deploy -n isecl

Configure kube-scheduler to establish communication with isecl-scheduler

• Add scheduler-policy.json under kube-scheduler section /etc/kubernetes/manifests/kube-scheduler.yaml as mentioned below

	spec:
          containers:
	  - command:
            - kube-scheduler
              --policy-config-file : "/opt/isecl-k8s-extensions/scheduler-policy.json"

• Add mount path for isecl extended scheduler under container section /etc/kubernetes/manifests/kube-scheduler.yaml as mentioned below

	containers:
		- mountPath: /opt/isecl-k8s-extensions
		name: extendedsched
		readOnly: true

• Add volume path for isecl extended scheduler under volumes section /etc/kubernetes/manifests/kube-scheduler.yaml as mentioned below

	spec:
	volumes:
	- hostPath:
		path: /opt/isecl-k8s-extensions
		type: ""
		name: extendedsched

• Restart Kubelet which restart all the k8s services including kube base scheduler

	systemctl restart kubelet

Uninstalling the isecl-k8s-extensions

• Uninstall the isecl-k8s-extensions by running following commands
  • Delete isecl-scheduler service kubectl delete svc isecl-scheduler-svc -n isecl
  • Delete isecl-controller and isecl-scheduler deployments kubectl delete deployment isecl-controller isecl-scheduler -n isecl
  • Delete hostattributes.crd.isecl.intel.com crds kubectl delete crds hostattributes.crd.isecl.intel.com
  • Remove the directories at /opt/isecl-k8s-extensions/ rm -rf /opt/isecl-k8s-extensions

Product Guide:

For more details on the product, installation and deployment strategies, please go through following, (Refer to latest and use case wise guide)

• https://01.org/intel-secl/documentation/intel%C2%AE-secl-dc-product-guide
• https://github.com/intel-secl/docs

Release Notes:

https://01.org/intel-secl/documentation/intel%C2%AE-secl-dc-release-notes

Issues:

Feel free to raise build, deploy or even runtime issues here,

https://github.com/intel-secl/k8s-extensions/issues