301 lines
8.9 KiB
Go
301 lines
8.9 KiB
Go
// A class that translates the informations held in the graph object
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// via its lists of components into an argo file, using the a list of
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// link ID to build the dag
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package workflow_builder
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import (
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. "oc-monitord/models"
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"os"
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"slices"
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"strings"
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"time"
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oclib "cloud.o-forge.io/core/oc-lib"
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"cloud.o-forge.io/core/oc-lib/models/resource_model"
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"cloud.o-forge.io/core/oc-lib/models/resources/workflow/graph"
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w "cloud.o-forge.io/core/oc-lib/models/workflow"
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"github.com/nwtgck/go-fakelish"
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"gopkg.in/yaml.v3"
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)
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type ArgoBuilder struct {
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OriginWorkflow w.Workflow
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Workflow Workflow
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Timeout int
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}
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type Workflow struct {
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ApiVersion string `yaml:"apiVersion"`
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Kind string `yaml:"kind"`
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Metadata struct {
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Name string `yaml:"name"`
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} `yaml:"metadata"`
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Spec Spec `yaml:"spec,omitempty"`
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}
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type Spec struct {
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Entrypoint string `yaml:"entrypoint"`
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Arguments []Parameter `yaml:"arguments,omitempty"`
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Volumes []VolumeClaimTemplate `yaml:"volumeClaimTemplates,omitempty"`
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Templates []Template `yaml:"templates"`
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Timeout int `yaml:"activeDeadlineSeconds,omitempty"`
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}
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func (b *ArgoBuilder) CreateDAG() (string, error) {
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// handle services by checking if there is only one processing with hostname and port
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if (b.isService()){
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b.createNginxVolumes()
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}
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b.createTemplates()
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b.createDAGstep()
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b.createVolumes()
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if b.Timeout > 0 {
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b.Workflow.Spec.Timeout = b.Timeout
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}
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b.Workflow.Spec.Entrypoint = "dag"
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b.Workflow.ApiVersion = "argoproj.io/v1alpha1"
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b.Workflow.Kind = "Workflow"
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random_name := generateWfName()
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b.Workflow.Metadata.Name = "oc-monitor-" + random_name
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logger := oclib.GetLogger()
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yamlified, err := yaml.Marshal(b.Workflow)
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if err != nil {
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logger.Error().Msg("Could not transform object to yaml file")
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return "", err
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}
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// Give a unique name to each argo file with its timestamp DD:MM:YYYY_hhmmss
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current_timestamp := time.Now().Format("02_01_2006_150405")
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file_name := random_name + "_" + current_timestamp + ".yml"
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workflows_dir := "./argo_workflows/"
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err = os.WriteFile(workflows_dir+file_name, []byte(yamlified), 0660)
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if err != nil {
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logger.Error().Msg("Could not write the yaml file")
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return "", err
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}
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return file_name, nil
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}
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func (b *ArgoBuilder) createTemplates() {
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for _, comp := range b.getProcessings() {
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var command string
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var args string
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var env string
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comp_res := comp.Processing
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command = getStringValue(comp_res.AbstractResource, "command")
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args = getStringValue(comp_res.AbstractResource, "args")
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env = getStringValue(comp_res.AbstractResource, "env")
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image_name := strings.Split(command, " ")[0] // TODO : decide where to store the image name, GUI or models.computing.Image
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temp_container := Container{Image: image_name} // TODO : decide where to store the image name, GUI or models.computing.Image
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temp_container.Command = getComputingCommands(command)
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temp_container.Args = getComputingArgs(args, command)
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// Only for dev purpose,
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input_names := getComputingEnvironmentName(strings.Split(env, " "))
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var inputs_container []Parameter
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for _, name := range input_names {
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inputs_container = append(inputs_container, Parameter{Name: name})
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}
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argo_name := getArgoName(comp_res.GetName(), comp.ID)
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new_temp := Template{Name: argo_name, Container: temp_container}
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new_temp.Inputs.Parameters = inputs_container
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new_temp.Container.VolumeMounts = append(new_temp.Container.VolumeMounts, VolumeMount{Name: "workdir", MountPath: "/mnt/vol"}) // TODO : replace this with a search of the storage / data source name
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new_temp.Container.VolumeMounts = append(new_temp.Container.VolumeMounts, VolumeMount{Name: "nginx-demo", MountPath: "/usr/share/nginx"}) // Used for processing services' demo with nginx
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b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, new_temp)
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}
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}
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func (b *ArgoBuilder) createDAGstep() {
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new_dag := Dag{}
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for _, comp := range b.getProcessings() {
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comp_res := comp.Processing
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env := getStringValue(comp_res.AbstractResource, "env")
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unique_name := getArgoName(comp_res.GetName(), comp.ID)
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step := Task{Name: unique_name, Template: unique_name}
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comp_envs := getComputingEnvironment(strings.Split(env, " "))
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for name, value := range comp_envs {
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step.Arguments.Parameters = append(step.Arguments.Parameters, Parameter{Name: name, Value: value})
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}
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// retrieves the name (computing.name-computing.ID)
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step.Dependencies = b.getDependency(comp.ID) // Error : we use the component ID instead of the GraphItem ID -> store objects
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new_dag.Tasks = append(new_dag.Tasks, step)
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}
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b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, Template{Name: "dag", Dag: new_dag})
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}
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func (b *ArgoBuilder) createVolumes() {
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// For testing purposes we only declare one volume, mounted in each computing
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new_volume := VolumeClaimTemplate{}
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new_volume.Metadata.Name = "workdir"
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new_volume.Spec.AccessModes = []string{"ReadWriteOnce"}
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new_volume.Spec.Resources.Requests.Storage = "1Gi"
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b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
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}
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// For demo purposes, until we implement the use of storage ressources
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func (b *ArgoBuilder) createNginxVolumes() {
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new_volume := VolumeClaimTemplate{}
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new_volume.Metadata.Name = "nginx-demo"
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new_volume.Spec.AccessModes = []string{"ReadWriteOnce"}
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new_volume.Spec.Resources.Requests.Storage = "1Gi"
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b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
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}
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func (b *ArgoBuilder) getDependency(current_computing_id string) (dependencies []string) {
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for _, link := range b.OriginWorkflow.Graph.Links {
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if b.OriginWorkflow.Graph.Items[link.Source.ID].Processing == nil {
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continue
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}
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source := b.OriginWorkflow.Graph.Items[link.Source.ID].Processing
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if current_computing_id == link.Destination.ID && source != nil {
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dependency_name := getArgoName(source.GetName(), link.Source.ID)
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dependencies = append(dependencies, dependency_name)
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}
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}
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return
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}
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func getComputingCommands(user_input string) []string {
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user_input = removeImageName(user_input)
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if len(user_input) == 0 {
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return []string{}
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}
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return strings.Split(user_input, " ")
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}
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func getComputingArgs(user_input string, command string) (list_args []string) {
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if len(user_input) == 0 {
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return
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}
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args := strings.Split(user_input," ")
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// quickfix that might need improvement
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if strings.Contains(command, "sh -c") {
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list_args = append(list_args, strings.Join(args, " "))
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return
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}
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list_args = append(list_args, args...)
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return
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}
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// Currently implements code to overcome problems in data structure
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func getComputingEnvironment(user_input []string) (map_env map[string]string) {
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logger := oclib.GetLogger()
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is_empty := len(user_input) == 0
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is_empty_string := len(user_input) == 1 && user_input[0] == ""
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if is_empty || is_empty_string {
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return
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}
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if len(user_input) == 1 {
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user_input = strings.Split(user_input[0], ",")
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}
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map_env = make(map[string]string, 0)
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for _, str := range user_input {
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new_pair := strings.Split(str, "=")
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if len(new_pair) != 2 {
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logger.Error().Msg("Error extracting the environment variable from " + str)
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panic(0)
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}
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map_env[new_pair[0]] = new_pair[1]
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}
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return
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}
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func getComputingEnvironmentName(user_input []string) (list_names []string) {
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env_map := getComputingEnvironment(user_input)
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for name := range env_map {
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list_names = append(list_names, name)
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}
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return
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}
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func generateWfName() (Name string) {
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Name = fakelish.GenerateFakeWord(5, 8) + "-" + fakelish.GenerateFakeWord(5, 8)
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return
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}
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func getArgoName(raw_name string, component_id string) (formatedName string) {
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formatedName = strings.ReplaceAll(raw_name, " ", "-")
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formatedName += "-" + component_id
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formatedName = strings.ToLower(formatedName)
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return
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}
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func removeImageName(user_input string) string {
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// First command is the name of the container for now
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if len(strings.Split(user_input, " ")) == 1 {
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return ""
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}
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slice_input := strings.Split(user_input, " ")
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new_slice := slice_input[1:]
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user_input = strings.Join(new_slice, " ")
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return user_input
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}
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// Return the graphItem containing a Processing resource, so that we have access to the ID of the graphItem in order to identify it in the links
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func (b *ArgoBuilder) getProcessings() (list_computings []graph.GraphItem) {
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for _, item := range b.OriginWorkflow.Graph.Items {
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if item.Processing != nil {
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list_computings = append(list_computings, item)
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}
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}
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return
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}
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func (b *ArgoBuilder) IsProcessing(id string) bool {
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return slices.Contains(b.OriginWorkflow.Processings, id)
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}
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func getStringValue(comp resource_model.AbstractResource, key string) string {
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if res := comp.GetModelValue(key); res != nil {
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return res.(string)
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}
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return ""
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}
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func (b *ArgoBuilder) isService() bool{
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// for dev purpose do not commit to main
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if os.Getenv("test_service") != ""{
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return true
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}
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comp_list := b.getProcessings()
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if len(comp_list) != 1 {
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return false
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}
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comp := comp_list[0]
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return comp.Data.ResourceModel.Model["port"].Value != "" && comp.Data.ResourceModel.Model["hostname"].Value != ""
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} |