mirror of https://github.com/k3s-io/k3s
405 lines
9.6 KiB
Go
405 lines
9.6 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 kubectl
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import (
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"fmt"
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"strconv"
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"strings"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/util/validation"
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)
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type BasicReplicationController struct{}
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func (BasicReplicationController) ParamNames() []GeneratorParam {
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return []GeneratorParam{
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{"labels", false},
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{"default-name", false},
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{"name", true},
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{"replicas", true},
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{"image", true},
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{"port", false},
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{"hostport", false},
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{"stdin", false},
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{"tty", false},
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{"command", false},
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{"args", false},
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{"env", false},
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{"requests", false},
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{"limits", false},
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}
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}
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// populateResourceList takes strings of form <resourceName1>=<value1>,<resourceName1>=<value2>
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func populateResourceList(spec string) (api.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 := api.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 := api.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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// HandleResourceRequirements parses the limits and requests parameters if specified
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func HandleResourceRequirements(params map[string]string) (api.ResourceRequirements, error) {
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result := api.ResourceRequirements{}
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limits, err := populateResourceList(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 := populateResourceList(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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func makePodSpec(params map[string]string, name string) (*api.PodSpec, error) {
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stdin, err := 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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tty, err := 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 := HandleResourceRequirements(params)
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if err != nil {
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return nil, err
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}
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spec := api.PodSpec{
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Containers: []api.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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TTY: tty,
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Resources: resourceRequirements,
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},
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},
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}
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return &spec, nil
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}
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func (BasicReplicationController) Generate(genericParams map[string]interface{}) (runtime.Object, 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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// TODO: abstract this logic so that multiple generators can handle env in the same way. Same for parse envs.
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var envs []api.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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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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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 nil, fmt.Errorf("'name' is a required parameter.")
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}
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}
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// TODO: extract this flag to a central location.
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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 = 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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count, err := strconv.Atoi(params["replicas"])
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if err != nil {
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return nil, err
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}
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podSpec, err := makePodSpec(params, name)
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if err != nil {
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return nil, err
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}
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if len(args) > 0 {
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command, err := GetBool(params, "command", false)
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if err != nil {
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return nil, 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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controller := api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: name,
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Labels: labels,
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},
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Spec: api.ReplicationControllerSpec{
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Replicas: count,
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Selector: labels,
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Template: &api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: labels,
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},
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Spec: *podSpec,
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},
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},
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}
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if err := updatePodPorts(params, &controller.Spec.Template.Spec); err != nil {
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return nil, err
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}
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return &controller, nil
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}
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func updatePodPorts(params map[string]string, podSpec *api.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 port > 0 {
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podSpec.Containers[0].Ports = []api.ContainerPort{
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{
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ContainerPort: 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 = 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() []GeneratorParam {
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return []GeneratorParam{
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{"labels", false},
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{"default-name", false},
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{"name", true},
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{"image", true},
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{"port", false},
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{"hostport", false},
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{"stdin", false},
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{"tty", false},
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{"restart", false},
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{"command", false},
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{"args", false},
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{"env", false},
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{"requests", false},
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{"limits", 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 := []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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// TODO: abstract this logic so that multiple generators can handle env in the same way. Same for parse envs.
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var envs []api.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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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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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 nil, fmt.Errorf("'name' is a required parameter.")
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}
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}
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// TODO: extract this flag to a central location.
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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 = ParseLabels(labelString)
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if err != nil {
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return nil, err
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}
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}
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stdin, err := 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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tty, err := 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 := HandleResourceRequirements(params)
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if err != nil {
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return nil, err
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}
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restartPolicy := api.RestartPolicy(params["restart"])
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if len(restartPolicy) == 0 {
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restartPolicy = api.RestartPolicyAlways
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}
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pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: name,
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Labels: labels,
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: name,
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Image: params["image"],
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ImagePullPolicy: api.PullIfNotPresent,
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Stdin: stdin,
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TTY: tty,
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Resources: resourceRequirements,
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},
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},
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DNSPolicy: api.DNSClusterFirst,
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RestartPolicy: restartPolicy,
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},
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}
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if len(args) > 0 {
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command, err := GetBool(params, "command", false)
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if err != nil {
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return nil, err
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}
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if command {
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pod.Spec.Containers[0].Command = args
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} else {
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pod.Spec.Containers[0].Args = args
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}
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}
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if len(envs) > 0 {
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pod.Spec.Containers[0].Env = envs
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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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func parseEnvs(envArray []string) ([]api.EnvVar, error) {
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envs := []api.EnvVar{}
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for _, env := range envArray {
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parts := strings.Split(env, "=")
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if len(parts) != 2 || !validation.IsCIdentifier(parts[0]) || len(parts[1]) == 0 {
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return nil, fmt.Errorf("invalid env: %v", env)
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}
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envVar := api.EnvVar{Name: parts[0], Value: parts[1]}
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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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