Building Kubernetes Minikube

The instructions provided below specify the steps to build Minikube version v0.30.0 on Linux on IBM Z for following distributions:

RHEL (7.4, 7.5, 7.6)
SLES (12 SP4, 15)
Ubuntu (16.04, 18.04)

General Notes:

When following the steps below please use a standard permission user unless otherwise specified.
A directory /<source_root>/ will be referred to in these instructions, this is a temporary writeable directory anywhere you'd like to place it.

Building Minikube

Build using script

If you want to build Minikube using manual steps, go to STEP 2.

Use the following commands to build Minikube using the build script. Please make sure you have wget installed.

wget -q https://raw.githubusercontent.com/linux-on-ibm-z/scripts/master/Minikube/build_minikube.sh

# Build Minikube
bash build_minikube.sh   [Provide -t option for executing build with tests]

If the build completes successfully, go to STEP 6. In case of error, check logs for more details or go to STEP 2 to follow manual build steps.

Install the build dependencies
- RHEL (7.4, 7.5, 7.6)
```
sudo yum install tar wget gcc git make python golang
```
- SLES (12 SP4, 15)
```
sudo zypper install tar wget gcc git make python
```
- Ubuntu (16.04, 18.04)
```
sudo apt-get update
sudo apt-get install tar wget gcc git make python golang-1.10
export PATH=/usr/lib/go-1.10/bin:$PATH
```
- Docker packages are provided for SLES, Ubuntu and RHEL(7.5 or higher) in their respective repositories. Instructions for installing Docker on RHEL(7.3) can be found here.You may use the same instructions for RHEL (7.4, 7.5, 7.6) as the binaries are expected to be compatible. More information about Docker CE can be found here.
Install Go (SLES) - Instructions for building Go can be found here.

Build the Minikube

Get Minikube source code

export GOPATH=/<source_root>/
git clone https://github.com/kubernetes/minikube.git $GOPATH/src/k8s.io/minikube
cd $GOPATH/src/k8s.io/minikube
git checkout v0.30.0

Modify the Makefile

@@ -297,7 +305,7 @@

 .PHONY: storage-provisioner-image
 storage-provisioner-image: out/storage-provisioner
-	docker build -t $(REGISTRY)/storage-provisioner:$(STORAGE_PROVISIONER_TAG) -f deploy/storage-provisioner/Dockerfile .
+	docker build -t $(REGISTRY)/storage-provisioner-s390x:$(STORAGE_PROVISIONER_TAG) -f deploy/storage-provisioner/Dockerfile .

 .PHONY: push-storage-provisioner-image
 push-storage-provisioner-image: storage-provisioner-image

Modify deploy/addons/addon-manager.yaml

@@ -25,7 +25,7 @@
   hostNetwork: true
   containers:
   - name: kube-addon-manager
-    image: k8s.gcr.io/kube-addon-manager:v8.6
+    image: k8s.gcr.io/kube-addon-manager-s390x:v8.6
	 env:
	 - name: KUBECONFIG
	   value: /var/lib/minikube/kubeconfig

Modify deploy/addons/dashboard/dashboard-dp.yaml

@@ -37,7 +37,7 @@
	 spec:
	   containers:
	   - name: kubernetes-dashboard
-        image: k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.0
+        image: k8s.gcr.io/kubernetes-dashboard-s390x:v1.10.0
		 imagePullPolicy: IfNotPresent
		 ports:
		 - containerPort: 9090

Modify deploy/addons/heapster/heapster-rc.yaml

@@ -37,7 +37,7 @@
	 spec:
	   containers:
	   - name: heapster
-        image: k8s.gcr.io/heapster-amd64:v1.5.3
+        image: k8s.gcr.io/heapster-s390x:v1.5.3
		 imagePullPolicy: IfNotPresent
		 command:
		 - /heapster

Modify deploy/addons/kube-dns/kube-dns-controller.yaml

@@ -44,7 +44,7 @@
		   optional: true
	   containers:
	   - name: kubedns
-        image: k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.5
+        image: k8s.gcr.io/k8s-dns-kube-dns-s390x:1.14.5
		 imagePullPolicy: IfNotPresent
		 resources:
		   # TODO: Set memory limits when we've profiled the container for large
@@ -96,7 +96,7 @@
		 - name: kube-dns-config
		   mountPath: /kube-dns-config
	   - name: dnsmasq
-        image: k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.5
+        image: k8s.gcr.io/k8s-dns-dnsmasq-nanny-s390x:1.14.5
		 imagePullPolicy: IfNotPresent
		 livenessProbe:
		   httpGet:
@@ -135,7 +135,7 @@
		 - name: kube-dns-config
		   mountPath: /etc/k8s/dns/dnsmasq-nanny
	   - name: sidecar
-        image: k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.5
+        image: k8s.gcr.io/k8s-dns-sidecar-s390x:1.14.5
		 imagePullPolicy: IfNotPresent
		 livenessProbe:
		   httpGet:

Modify deploy/addons/storage-provisioner/storage-provisioner.yaml

@@ -51,7 +51,7 @@
   hostNetwork: true
   containers:
   - name: storage-provisioner
-    image: gcr.io/k8s-minikube/storage-provisioner:v1.8.1
+    image: gcr.io/k8s-minikube/storage-provisioner-s390x:v1.8.1
	 command: ["/storage-provisioner"]
	 imagePullPolicy: IfNotPresent
	 volumeMounts:

Modify pkg/minikube/constants/constants.go

@@ -169,7 +169,7 @@
 )

 func GetKubernetesReleaseURL(binaryName, version string) string {
-	return fmt.Sprintf("https://storage.googleapis.com/kubernetes-release/release/%s/bin/linux/amd64/%s", version, binaryName)
+	return fmt.Sprintf("https://storage.googleapis.com/kubernetes-release/release/%s/bin/linux/s390x/%s", version, binaryName)
 }

 func GetKubernetesReleaseURLSha1(binaryName, version string) string {
@@ -183,10 +183,10 @@
 func GetKubeadmCachedImages(kubernetesVersionStr string) []string {

	var images = []string{
-		"k8s.gcr.io/kube-proxy-amd64:" + kubernetesVersionStr,
-		"k8s.gcr.io/kube-scheduler-amd64:" + kubernetesVersionStr,
-		"k8s.gcr.io/kube-controller-manager-amd64:" + kubernetesVersionStr,
-		"k8s.gcr.io/kube-apiserver-amd64:" + kubernetesVersionStr,
+		"k8s.gcr.io/kube-proxy-s390x:" + kubernetesVersionStr,
+		"k8s.gcr.io/kube-scheduler-s390x:" + kubernetesVersionStr,
+		"k8s.gcr.io/kube-controller-manager-s390x:" + kubernetesVersionStr,
+		"k8s.gcr.io/kube-apiserver-s390x:" + kubernetesVersionStr,
	}

	gt_v1_10 := semver.MustParseRange(">=1.11.0")
@@ -201,11 +201,11 @@

	if v1_10(kubernetesVersion) || gt_v1_10(kubernetesVersion) {
		images = append(images, []string{
-			"k8s.gcr.io/pause-amd64:3.1",
-			"k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8",
-			"k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8",
-			"k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8",
-			"k8s.gcr.io/etcd-amd64:3.1.12",
+			"k8s.gcr.io/pause-s390x:3.1",
+			"k8s.gcr.io/k8s-dns-kube-dns-s390x:1.14.8",
+			"k8s.gcr.io/k8s-dns-dnsmasq-nanny-s390x:1.14.8",
+			"k8s.gcr.io/k8s-dns-sidecar-s390x:1.14.8",
+			"k8s.gcr.io/etcd-s390x:3.1.12",
		}...)

	} else if v1_9(kubernetesVersion) {
@@ -228,9 +228,9 @@
	}

	images = append(images, []string{
-		"k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.0",
-		"k8s.gcr.io/kube-addon-manager:v8.6",
-		"gcr.io/k8s-minikube/storage-provisioner:v1.8.1",
+		"k8s.gcr.io/kubernetes-dashboard-s390x:v1.10.0",
+		"k8s.gcr.io/kube-addon-manager-s390x:v8.6",
+		"gcr.io/k8s-minikube/storage-provisioner-s390x:v1.8.1",
	}...)

	return images

Modify deploy/storage-provisioner/Dockerfile

@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.

-FROM scratch
+FROM ubuntu:16.04
 COPY out/storage-provisioner storage-provisioner
 CMD ["/storage-provisioner"]

Build the Minikube

cd $GOPATH/src/k8s.io/minikube
make out/minikube-linux-s390x

Add minikube to /usr/bin
```
 sudo cp ./out/minikube-linux-s390x /usr/bin/minikube
```
Note:
- The tab space should be used for alignment in Makefile

Execute test suite
```
cd $GOPATH/src/k8s.io/minikube
make test
```
Note:
- If you are using go v1.11, ignore the Gofmt errors in files: cmd/minikube/cmd/config/config_test.go error as that doesn't affect functionality.(Reference)

Test Minikube service

cd $GOPATH/src/k8s.io/minikube
make storage-provisioner-image
curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/s390x/kubectl && chmod +x kubectl && sudo cp kubectl /usr/local/bin/ && rm kubectl

export MINIKUBE_WANTUPDATENOTIFICATION=false
export MINIKUBE_WANTREPORTERRORPROMPT=false
export MINIKUBE_HOME=$HOME
export CHANGE_MINIKUBE_NONE_USER=true
mkdir $HOME/.kube
touch $HOME/.kube/config
export KUBECONFIG=$HOME/.kube/config
sudo -E ./out/minikube-linux-s390x start --vm-driver=none

Note:

Above command will bring the single kubernetes cluster. The cluster can be viewed using the following command:

kubectl get pods --all-namespaces

Output should look similar to this:

NAMESPACE     NAME                                    READY   STATUS    RESTARTS   AGE
kube-system   coredns-c4cffd6dc-h7z68                 1/1     Running   0          1m
kube-system   etcd-minikube                           1/1     Running   0          39s
kube-system   kube-addon-manager-minikube             1/1     Running   0          30s
kube-system   kube-apiserver-minikube                 1/1     Running   0          18s
kube-system   kube-controller-manager-minikube        1/1     Running   0          20s
kube-system   kube-dns-74b5f7bd8c-d6rpt               3/3     Running   0          1m
kube-system   kube-proxy-bz7jp                        1/1     Running   0          1m
kube-system   kube-scheduler-minikube                 1/1     Running   0          39s
kube-system   kubernetes-dashboard-787985b498-ltf5z   1/1     Running   0          1m
kube-system   storage-provisioner                     1/1     Running   1          1m

References:

https://github.com/kubernetes/minikube.git

The information provided in this article is accurate at the time of writing, but on-going development in the open-source projects involved may make the information incorrect or obsolete. Please open issue or contact us on IBM Z Community if you have any questions or feedback.

Building Kubernetes Minikube

Building Kubernetes Minikube

Building Minikube

References:

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