mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
380 lines
9.8 KiB
Go
380 lines
9.8 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package versioned
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import (
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"fmt"
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"strconv"
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"strings"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/validation"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/generate"
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)
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// getLabels returns map of labels.
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func getLabels(params map[string]string, name string) (map[string]string, error) {
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labelString, found := params["labels"]
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var labels map[string]string
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var err error
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if found && len(labelString) > 0 {
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labels, err = generate.ParseLabels(labelString)
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if err != nil {
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return nil, err
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}
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} else {
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labels = map[string]string{
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"run": name,
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}
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}
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return labels, nil
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}
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// getName returns the name of newly created resource.
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func getName(params map[string]string) (string, error) {
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name, found := params["name"]
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if !found || len(name) == 0 {
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name, found = params["default-name"]
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if !found || len(name) == 0 {
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return "", fmt.Errorf("'name' is a required parameter")
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}
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}
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return name, nil
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}
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// getParams returns map of generic parameters.
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func getParams(genericParams map[string]interface{}) (map[string]string, error) {
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params := map[string]string{}
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for key, value := range genericParams {
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strVal, isString := value.(string)
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if !isString {
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return nil, fmt.Errorf("expected string, saw %v for '%s'", value, key)
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}
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params[key] = strVal
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}
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return params, nil
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}
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// getArgs returns arguments for the container command.
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func getArgs(genericParams map[string]interface{}) ([]string, error) {
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args := []string{}
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val, found := genericParams["args"]
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if found {
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var isArray bool
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args, isArray = val.([]string)
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if !isArray {
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return nil, fmt.Errorf("expected []string, found: %v", val)
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}
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delete(genericParams, "args")
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}
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return args, nil
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}
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// getAnnotations returns map of annotations.
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func getAnnotations(genericParams map[string]interface{}) (map[string]string, error) {
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annotationStrings, ok := genericParams["annotations"]
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if !ok {
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return nil, nil
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}
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annotationStringArray, ok := annotationStrings.([]string)
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if !ok {
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return nil, fmt.Errorf("expected []string, found: %v", annotationStrings)
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}
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annotations, _, err := cmdutil.ParsePairs(annotationStringArray, "annotations", false)
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if err != nil {
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return nil, err
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}
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delete(genericParams, "annotations")
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return annotations, nil
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}
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// getEnvs returns environment variables.
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func getEnvs(genericParams map[string]interface{}) ([]v1.EnvVar, error) {
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var envs []v1.EnvVar
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envStrings, found := genericParams["env"]
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if found {
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if envStringArray, isArray := envStrings.([]string); isArray {
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var err error
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envs, err = parseEnvs(envStringArray)
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if err != nil {
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return nil, err
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}
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delete(genericParams, "env")
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} else {
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return nil, fmt.Errorf("expected []string, found: %v", envStrings)
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}
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}
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return envs, nil
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}
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// populateResourceListV1 takes strings of form <resourceName1>=<value1>,<resourceName1>=<value2>
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// and returns ResourceList.
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func populateResourceListV1(spec string) (v1.ResourceList, error) {
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// empty input gets a nil response to preserve generator test expected behaviors
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if spec == "" {
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return nil, nil
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}
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result := v1.ResourceList{}
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resourceStatements := strings.Split(spec, ",")
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for _, resourceStatement := range resourceStatements {
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parts := strings.Split(resourceStatement, "=")
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if len(parts) != 2 {
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return nil, fmt.Errorf("Invalid argument syntax %v, expected <resource>=<value>", resourceStatement)
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}
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resourceName := v1.ResourceName(parts[0])
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resourceQuantity, err := resource.ParseQuantity(parts[1])
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if err != nil {
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return nil, err
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}
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result[resourceName] = resourceQuantity
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}
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return result, nil
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}
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// HandleResourceRequirementsV1 parses the limits and requests parameters if specified
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// and returns ResourceRequirements.
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func HandleResourceRequirementsV1(params map[string]string) (v1.ResourceRequirements, error) {
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result := v1.ResourceRequirements{}
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limits, err := populateResourceListV1(params["limits"])
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if err != nil {
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return result, err
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}
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result.Limits = limits
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requests, err := populateResourceListV1(params["requests"])
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if err != nil {
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return result, err
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}
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result.Requests = requests
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return result, nil
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}
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// updatePodContainers updates PodSpec.Containers with passed parameters.
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func updatePodContainers(params map[string]string, args []string, envs []v1.EnvVar, imagePullPolicy v1.PullPolicy, podSpec *v1.PodSpec) error {
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if len(args) > 0 {
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command, err := generate.GetBool(params, "command", false)
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if err != nil {
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return err
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}
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if command {
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podSpec.Containers[0].Command = args
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} else {
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podSpec.Containers[0].Args = args
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}
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}
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if len(envs) > 0 {
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podSpec.Containers[0].Env = envs
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}
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if len(imagePullPolicy) > 0 {
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// imagePullPolicy should be valid here since we have verified it before.
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podSpec.Containers[0].ImagePullPolicy = imagePullPolicy
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}
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return nil
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}
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// updatePodContainers updates PodSpec.Containers.Ports with passed parameters.
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func updatePodPorts(params map[string]string, podSpec *v1.PodSpec) (err error) {
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port := -1
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hostPort := -1
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if len(params["port"]) > 0 {
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port, err = strconv.Atoi(params["port"])
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if err != nil {
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return err
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}
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}
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if len(params["hostport"]) > 0 {
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hostPort, err = strconv.Atoi(params["hostport"])
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if err != nil {
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return err
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}
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if hostPort > 0 && port < 0 {
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return fmt.Errorf("--hostport requires --port to be specified")
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}
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}
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// Don't include the port if it was not specified.
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if len(params["port"]) > 0 {
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podSpec.Containers[0].Ports = []v1.ContainerPort{
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{
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ContainerPort: int32(port),
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},
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}
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if hostPort > 0 {
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podSpec.Containers[0].Ports[0].HostPort = int32(hostPort)
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}
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}
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return nil
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}
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type BasicPod struct{}
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func (BasicPod) ParamNames() []generate.GeneratorParam {
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return []generate.GeneratorParam{
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{Name: "labels", Required: false},
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{Name: "annotations", Required: false},
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{Name: "default-name", Required: false},
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{Name: "name", Required: true},
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{Name: "image", Required: true},
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{Name: "image-pull-policy", Required: false},
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{Name: "port", Required: false},
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{Name: "hostport", Required: false},
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{Name: "stdin", Required: false},
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{Name: "leave-stdin-open", Required: false},
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{Name: "tty", Required: false},
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{Name: "restart", Required: false},
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{Name: "command", Required: false},
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{Name: "args", Required: false},
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{Name: "env", Required: false},
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{Name: "requests", Required: false},
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{Name: "limits", Required: false},
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{Name: "serviceaccount", Required: false},
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{Name: "privileged", Required: false},
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}
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}
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func (BasicPod) Generate(genericParams map[string]interface{}) (runtime.Object, error) {
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args, err := getArgs(genericParams)
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if err != nil {
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return nil, err
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}
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envs, err := getEnvs(genericParams)
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if err != nil {
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return nil, err
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}
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annotations, err := getAnnotations(genericParams)
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if err != nil {
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return nil, err
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}
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params, err := getParams(genericParams)
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if err != nil {
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return nil, err
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}
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name, err := getName(params)
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if err != nil {
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return nil, err
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}
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labels, err := getLabels(params, name)
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if err != nil {
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return nil, err
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}
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stdin, err := generate.GetBool(params, "stdin", false)
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if err != nil {
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return nil, err
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}
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leaveStdinOpen, err := generate.GetBool(params, "leave-stdin-open", false)
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if err != nil {
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return nil, err
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}
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tty, err := generate.GetBool(params, "tty", false)
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if err != nil {
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return nil, err
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}
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resourceRequirements, err := HandleResourceRequirementsV1(params)
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if err != nil {
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return nil, err
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}
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restartPolicy := v1.RestartPolicy(params["restart"])
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if len(restartPolicy) == 0 {
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restartPolicy = v1.RestartPolicyAlways
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}
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privileged, err := generate.GetBool(params, "privileged", false)
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if err != nil {
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return nil, err
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}
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var securityContext *v1.SecurityContext
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if privileged {
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securityContext = &v1.SecurityContext{
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Privileged: &privileged,
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}
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}
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pod := v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Labels: labels,
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Annotations: annotations,
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},
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Spec: v1.PodSpec{
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ServiceAccountName: params["serviceaccount"],
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Containers: []v1.Container{
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{
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Name: name,
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Image: params["image"],
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Stdin: stdin,
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StdinOnce: !leaveStdinOpen && stdin,
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TTY: tty,
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Resources: resourceRequirements,
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SecurityContext: securityContext,
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},
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},
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DNSPolicy: v1.DNSClusterFirst,
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RestartPolicy: restartPolicy,
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},
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}
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imagePullPolicy := v1.PullPolicy(params["image-pull-policy"])
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if err = updatePodContainers(params, args, envs, imagePullPolicy, &pod.Spec); err != nil {
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return nil, err
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}
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if err := updatePodPorts(params, &pod.Spec); err != nil {
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return nil, err
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}
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return &pod, nil
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}
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// parseEnvs converts string into EnvVar objects.
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func parseEnvs(envArray []string) ([]v1.EnvVar, error) {
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envs := make([]v1.EnvVar, 0, len(envArray))
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for _, env := range envArray {
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pos := strings.Index(env, "=")
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if pos == -1 {
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return nil, fmt.Errorf("invalid env: %v", env)
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}
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name := env[:pos]
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value := env[pos+1:]
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if len(name) == 0 {
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return nil, fmt.Errorf("invalid env: %v", env)
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}
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if len(validation.IsEnvVarName(name)) != 0 {
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return nil, fmt.Errorf("invalid env: %v", env)
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}
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envVar := v1.EnvVar{Name: name, Value: value}
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envs = append(envs, envVar)
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}
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return envs, nil
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}
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