Support additional containers and volumes in TiDB cluster

Makefile

@@ -141,7 +141,7 @@ check-setup:
 check: check-setup lint tidy check-static check-codegen check-terraform check-boilerplate check-openapi-spec check-crd-groups
 
 check-static:
-	@ # Not running vet and fmt through metalinter becauase it ends up looking at vendor
+	@ # Not running vet and fmt through metalinter because it ends up looking at vendor
 	@echo "gofmt checking"
 	gofmt -s -l -w $(FILES) 2>&1| $(FAIL_ON_STDOUT)
 	@echo "go vet check"

docs/api-references/docs.md

@@ -3053,6 +3053,35 @@ tidb-operator built envs.
 - SLOW_LOG_FILE</p>
 </td>
 </tr>
+<tr>
+<td>
+<code>additionalContainers</code></br>
+<em>
+<a href="https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.13/#container-v1-core">
+[]Kubernetes core/v1.Container
+</a>
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Additional containers of the component.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>additionalVolumes</code></br>
+<em>
+<a href="https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.13/#volume-v1-core">
+[]Kubernetes core/v1.Volume
+</a>
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Additional volumes of component pod. Currently this only
+supports additional volume mounts for sidecar containers.</p>
+</td>
+</tr>
 </tbody>
 </table>
 <h3 id="configmapref">ConfigMapRef</h3>

hack/update-crd-groups.sh

@@ -28,7 +28,7 @@ crd_target="$ROOT/manifests/crd.yaml"
 export GOBIN="${OUTPUT_BIN}"
 PATH="${GOBIN}:${PATH}"
 
-# Enable go modules explicilty.
+# Enable go modules explicitly.
 export GO111MODULE=on
 go install github.com/pingcap/tidb-operator/cmd/to-crdgen
 

hack/update-openapi-spec.sh

@@ -26,7 +26,7 @@ source "${ROOT}/hack/lib.sh"
 export GOBIN="${OUTPUT_BIN}"
 PATH="${GOBIN}:${PATH}"
 
-# Enable go modules explicilty.
+# Enable go modules explicitly.
 export GO111MODULE=on
 go install k8s.io/code-generator/cmd/openapi-gen