What am I trying to do?

operator-sdk init --domain=example.com --repo=github.com/memcached-operator

Writing scaffold for you to edit...
Get controller runtime:
$ go get sigs.k8s.io/[email protected]
go: downloading sigs.k8s.io/controller-runtime v0.6.3
go: downloading k8s.io/apimachinery v0.18.6
go: downloading k8s.io/client-go v0.18.6
go: downloading k8s.io/utils v0.0.0-20200603063816-c1c6865ac451
.
.
go: downloading golang.org/x/sys v0.0.0-20191022100944-742c48ecaeb7
go: downloading golang.org/x/text v0.3.2
go get: added sigs.k8s.io/controller-tools v0.3.0
/root/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
go fmt ./...
go vet ./...
go build -o bin/manager main.go
Next: define a resource with:
$ operator-sdk create api

==> Error while creating a simple Memcached API

operator-sdk create api --group cache --version v1alpha1 --kind Memcached --resource --controller

Writing scaffold for you to edit...
api/v1alpha1/memcached_types.go
controllers/memcached_controller.go
Running make:
$ make
which: no controller-gen in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/go/bin)
which: no kustomize in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/go/bin)
go: creating new go.mod: module tmp
go get: added sigs.k8s.io/controller-tools v0.3.0
/root/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
Error: go [list -e -json -compiled=true -test=false -export=false -deps=true -find=false -tags ignore_autogenerated -- ./...]: exit status 1: go: github.com/example/memcached-operator/controllers: package github.com/go-logr/logr imported from implicitly required module; to add missing requirements, run:
go get github.com/go-logr/[email protected]

+output:artifacts[:code=],config= package outputs artifacts to different locations, depending on whether they're package-associated or not.
+output:dir= package outputs each artifact to the given directory, regardless of if it's package-associated or not.
+output:none package skips outputting anything.
+output:stdout package outputs everything to standard-out, with no separation.

run controller-gen object:headerFile=hack/boilerplate.go.txt paths=./... -w to see all available markers, or controller-gen object:headerFile=hack/boilerplate.go.txt paths=./... -h for usage
make: *** [generate] Error 1
Error: failed to create API with version "3-alpha": exit status 2
Usage:
operator-sdk create api [flags]

operator-sdk create api --group cache --version v1alpha1 --kind Memcached --resource --controller

Configuration:

#operator-sdk version
operator-sdk version: "v1.2.0", commit: "215fc50b2d4acc7d92b36828f42d7d1ae212015c", kubernetes version: "v1.18.8", go version: "go1.15.3", GOOS: "linux", GOARCH: "amd64"

go version

go version go1.16.3 linux/amd64

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.16.3"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/root/projects/memcached-operator/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2451634252=/tmp/go-build -gno-record-gcc-switches"

kubectl version

Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.5", GitCommit:"6b1d87acf3c8253c123756b9e61dac642678305f", GitTreeState:"clean", BuildDate:"2021-03-18T01:10:43Z", GoVersion:"go1.15.8", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.6", GitCommit:"dff82dc0de47299ab66c83c626e08b245ab19037", GitTreeState:"clean", BuildDate:"2020-07-15T16:51:04Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}

Appreciate if someone can help me understand what is causing this issue, am new to OLM and trying figure out how to create a operator.

Best regards,
Prashanth