Use SCTP in Kubernetes.
An image with ncat as a test server is created. ncat has SCTP
support and is used both as client and server.
SCTP support in
K8s
is currently in "alpha" and --feature-gates=SCTPSupport=true must be
set.
Build local image;
images mkimage --force --upload ./image
Or;
Prepare private-reg;
images lreg_cache registry.nordix.org/cloud-native/ncat:v0.1
images lreg_cache registry.nordix.org/cloud-native/mserver:latest
xc mkcdrom k8s-dual-stack k8s-sctp private-reg; xc starts
# On cluster;
kubectl apply -f /etc/kubernetes/ncat-dual-stack-sctp.yaml
ncat -i 10ms --sctp ncat-ipv4-sctp.default.svc.xcluster 5001 2> /dev/null
ncat -i 10ms --sctp ncat-ipv6-sctp.default.svc.xcluster 5001 2> /dev/null
# TCP for reference;
kubectl apply -f /etc/kubernetes/ncat-dual-stack.yaml
ncat -i 10ms ncat-ipv4.default.svc.xcluster 5001 2> /dev/null
ncat -i 10ms ncat-ipv6.default.svc.xcluster 5001 2> /dev/null
cdo k8s-sctp
XOVLS=private-reg ./k8s-sctp.sh test > /dev/null
The ncat image has no "os" (shell) but the POD also contains the
mserver container that has a shell and assorted network tools,
e.g. netstat and tcpdump.
kubectl get pods -l 'app=ncat-sctp'
pod=$(kubectl get pods -l 'app=ncat-sctp' -o json | jq -r .items[0].metadata.name)
kubectl exec -it -c mserver $pod sh
# In the pod;
netstat -putlnSw
tcpdump -eni eth0 sctp
# ...