Code from episode

Signed-off-by: Joe Beda <[email protected]>

.gitignore

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+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Kubernetes Generated files - skip generated files, except for vendored files
+
+!vendor/**/zz_generated.*
+
+# editor and IDE paraphernalia
+.idea
+*.swp
+*.swo
+*~

.vscode/settings.json

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+{
+  "go.inferGopath": false
+}

Dockerfile

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+# Build the manager binary
+FROM golang:1.12.5 as builder
+
+WORKDIR /workspace
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+# cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN go mod download
+
+# Copy the go source
+COPY main.go main.go
+COPY api/ api/
+COPY controllers/ controllers/
+
+# Build
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go
+
+# Use distroless as minimal base image to package the manager binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:latest
+WORKDIR /
+COPY --from=builder /workspace/manager .
+ENTRYPOINT ["/manager"]

Makefile

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+
+# Image URL to use all building/pushing image targets
+IMG ?= controller:latest
+# Produce CRDs that work back to Kubernetes 1.11 (no version conversion)
+CRD_OPTIONS ?= "crd:trivialVersions=true"
+
+# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
+ifeq (,$(shell go env GOBIN))
+GOBIN=$(shell go env GOPATH)/bin
+else
+GOBIN=$(shell go env GOBIN)
+endif
+
+all: manager
+
+# Run tests
+test: generate fmt vet manifests
+	go test ./api/... ./controllers/... -coverprofile cover.out
+
+# Build manager binary
+manager: generate fmt vet
+	go build -o bin/manager main.go
+
+# Run against the configured Kubernetes cluster in ~/.kube/config
+run: generate fmt vet
+	go run ./main.go
+
+# Install CRDs into a cluster
+install: manifests
+	kubectl apply -f config/crd/bases
+
+# Deploy controller in the configured Kubernetes cluster in ~/.kube/config
+deploy: manifests
+	kubectl apply -f config/crd/bases
+	kustomize build config/default | kubectl apply -f -
+
+# Generate manifests e.g. CRD, RBAC etc.
+manifests: controller-gen
+	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+
+# Run go fmt against code
+fmt:
+	go fmt ./...
+
+# Run go vet against code
+vet:
+	go vet ./...
+
+# Generate code
+generate: controller-gen
+	$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths=./api/...
+
+# Build the docker image
+docker-build: test
+	docker build . -t ${IMG}
+	@echo "updating kustomize image patch file for manager resource"
+	sed -i'' -e 's@image: .*@image: '"${IMG}"'@' ./config/default/manager_image_patch.yaml
+
+# Push the docker image
+docker-push:
+	docker push ${IMG}
+
+# find or download controller-gen
+# download controller-gen if necessary
+controller-gen:
+ifeq (, $(shell which controller-gen))
+	go get sigs.k8s.io/controller-tools/cmd/[email protected]
+CONTROLLER_GEN=$(GOBIN)/controller-gen
+else
+CONTROLLER_GEN=$(shell which controller-gen)
+endif

PROJECT

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+version: "2"
+domain: tgik.io
+repo: github.com/jbeda/kinecraft
+resources:
+- group: minecraft
+  version: v1alpha1
+  kind: Server

README.md

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+* Populate status
+* Recreate Pod when parameters change
+* Create and manage a Service along with each Pod
+* +kubebulder:validation:Enum for serverType
+* Build a minecraft protocol proxy
+* Define CRDs for plugins
+* Graceful shutdown of server
+* Hibernate with saving worlds to s3
+* Build an admin web ui?
+  * Get/reflect logs somehow
+  * Send custom rcon commands

api/v1alpha1/groupversion_info.go

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+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package v1alpha1 contains API Schema definitions for the minecraft v1alpha1 API group
+// +kubebuilder:object:generate=true
+// +groupName=minecraft.tgik.io
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/scheme"
+)
+
+var (
+	// GroupVersion is group version used to register these objects
+	GroupVersion = schema.GroupVersion{Group: "minecraft.tgik.io", Version: "v1alpha1"}
+
+	// SchemeBuilder is used to add go types to the GroupVersionKind scheme
+	SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
+
+	// AddToScheme adds the types in this group-version to the given scheme.
+	AddToScheme = SchemeBuilder.AddToScheme
+)

api/v1alpha1/server_types.go

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+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
+// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
+
+// ServerSpec defines the desired state of Server
+type ServerSpec struct {
+	// The type of Minecraft Server we want to run. Includes VANILLA, PAPER, etc.
+	ServerType string `json:"serverType,omitempty"`
+
+	// The name of the server when a user connects
+	ServerName string `json:"serverName,omitempty"`
+
+	// The list of users that are ops/admin on the server
+	Ops []string `json:"ops,omitempty"`
+
+	// The list of users that can join. If this is empty then the server is open
+	// to the public.
+	Allowlist []string `json:"allowList,omitempty"`
+
+	// Do you agree to the EULA?
+	EULA bool `json:"EULA,omitempty"`
+}
+
+// ServerStatus defines the observed state of Server
+type ServerStatus struct {
+	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// +kubebuilder:object:root=true
+
+// Server is the Schema for the servers API
+type Server struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   ServerSpec   `json:"spec,omitempty"`
+	Status ServerStatus `json:"status,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+
+// ServerList contains a list of Server
+type ServerList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []Server `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&Server{}, &ServerList{})
+}

api/v1alpha1/zz_generated.deepcopy.go

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+// +build !ignore_autogenerated
+
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// autogenerated by controller-gen object, do not modify manually
+
+package v1alpha1
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Server) DeepCopyInto(out *Server) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	in.Spec.DeepCopyInto(&out.Spec)
+	out.Status = in.Status
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Server.
+func (in *Server) DeepCopy() *Server {
+	if in == nil {
+		return nil
+	}
+	out := new(Server)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *Server) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *ServerList) DeepCopyInto(out *ServerList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	out.ListMeta = in.ListMeta
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]Server, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ServerList.
+func (in *ServerList) DeepCopy() *ServerList {
+	if in == nil {
+		return nil
+	}
+	out := new(ServerList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *ServerList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *ServerSpec) DeepCopyInto(out *ServerSpec) {
+	*out = *in
+	if in.Ops != nil {
+		in, out := &in.Ops, &out.Ops
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Allowlist != nil {
+		in, out := &in.Allowlist, &out.Allowlist
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ServerSpec.
+func (in *ServerSpec) DeepCopy() *ServerSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(ServerSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *ServerStatus) DeepCopyInto(out *ServerStatus) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ServerStatus.
+func (in *ServerStatus) DeepCopy() *ServerStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(ServerStatus)
+	in.DeepCopyInto(out)
+	return out
+}