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March 5, 2019 06:01
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[DONT DELETE] installer related gist and comments.
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Adding worker label to master.
INSTALL_DIR=test
# Destroy an existing cluster and resources
./openshift-install --dir $INSTALL_DIR destroy cluster --log-level debug
# Create the INSTALL_DIR for the installer and copy the install-config
rm -fr $INSTALL_DIR && mkdir $INSTALL_DIR && cp install-config.yaml $INSTALL_DIR
# Create the manifests using the INSTALL_DIR
./openshift-install --dir $INSTALL_DIR create manifests
# Copy the config which removes taint from master
cp 99_master-kubelet-no-taint.yaml $INSTALL_DIR/openshift/
# Edit $INSTALL_DIR/openshift/99_openshift-cluster-api_master-machines-0.yaml and add spec.metadata.labels[node-role.kubernetes.io/worker] ""
# Start the cluster with 10GB memory and 4 CPU create and wait till it finish
export TF_VAR_libvirt_master_memory=10192
export TF_VAR_libvirt_master_vcpu=4
./openshift-install --dir $INSTALL_DIR create cluster
# check the machine from openshift-machine-api namespace.
$ oc get machines -n openshift-machine-api
NAME INSTANCE STATE TYPE REGION ZONE AGE
test1-9k6cz-master-0 8m1s
$ oc get machine test1-9k6cz-master-0 -oyaml -n openshift-machine-api
apiVersion: machine.openshift.io/v1beta1
kind: Machine
metadata:
creationTimestamp: 2019-03-07T08:37:22Z
finalizers:
- machine.machine.openshift.io
generation: 1
labels:
machine.openshift.io/cluster-api-cluster: test1-9k6cz
machine.openshift.io/cluster-api-machine-role: master
machine.openshift.io/cluster-api-machine-type: master
name: test1-9k6cz-master-0
namespace: openshift-machine-api
resourceVersion: "4590"
selfLink: /apis/machine.openshift.io/v1beta1/namespaces/openshift-machine-api/machines/test1-9k6cz-master-0
uid: 3a2453d5-40b4-11e9-a93a-52fdfc072182
spec:
metadata:
creationTimestamp: null
labels:
node-role.kubernetes.io/worker: "" ==> This contains the change we made before starting cluster.
providerSpec:
value:
apiVersion: libvirtproviderconfig.k8s.io/v1alpha1
autostart: false
cloudInit: null
domainMemory: 4096
domainVcpu: 2
ignKey: ""
ignition:
userDataSecret: master-user-data
kind: LibvirtMachineProviderConfig
networkInterfaceAddress: 192.168.126.0/24
networkInterfaceHostname: ""
networkInterfaceName: test1-9k6cz
networkUUID: ""
uri: qemu+tcp://libvirt.default/system
volume:
baseVolumeID: /var/lib/libvirt/images/test1-9k6cz-base
poolName: default
volumeName: ""
versions:
kubelet: ""
# Check the labels on the Master (This doesn't contain the worker label)
$ oc get nodes --show-labels
NAME STATUS ROLES AGE VERSION LABELS
test1-9k6cz-master-0 Ready master 21m v1.12.4+4dd65df23d beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=test1-9k6cz-master-0,node-role.kubernetes.io/master=
# Need to add label manually
$ oc label nodes test1-9k6cz-master-0 node-role.kubernetes.io/worker=
node/test1-9k6cz-master-0 labeled
# Now master have worker label and ingress also scheduled succesfully
$ oc get nodes --show-labels
NAME STATUS ROLES AGE VERSION LABELS
test1-9k6cz-master-0 Ready master,worker 22m v1.12.4+4dd65df23d beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=test1-9k6cz-master-0,node-role.kubernetes.io/master=,node-role.kubernetes.io/worker=
How to debug for a node
$ oc debug node/<node_name>
$ chroot /host /bin/bash
Get the endpoint of a service
$ oc get svc
$ oc get ed <svc_name>
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Node selector for worker