oc-monitord/workflow_builder/argo_builder.go

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// A class that translates the informations held in the graph object
// via its lists of components into an argo file, using the a list of
// link ID to build the dag
package workflow_builder
import (
. "oc-monitord/models"
"os"
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"slices"
"strings"
"time"
oclib "cloud.o-forge.io/core/oc-lib"
"cloud.o-forge.io/core/oc-lib/models/resource_model"
"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"
"github.com/nwtgck/go-fakelish"
"github.com/rs/zerolog"
"gopkg.in/yaml.v3"
)
var logger zerolog.Logger
type ArgoBuilder struct {
OriginWorkflow w.Workflow
Workflow Workflow
Services *Service
Timeout int
}
type Workflow struct {
ApiVersion string `yaml:"apiVersion"`
Kind string `yaml:"kind"`
Metadata struct {
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Name string `yaml:"name"`
} `yaml:"metadata"`
Spec Spec `yaml:"spec,omitempty"`
}
type Spec struct {
Entrypoint string `yaml:"entrypoint"`
Arguments []Parameter `yaml:"arguments,omitempty"`
Volumes []VolumeClaimTemplate `yaml:"volumeClaimTemplates,omitempty"`
Templates []Template `yaml:"templates"`
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Timeout int `yaml:"activeDeadlineSeconds,omitempty"`
}
func (b *ArgoBuilder) CreateDAG() (string, error) {
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// handle services by checking if there is only one processing with hostname and port
b.createNginxVolumes()
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b.createTemplates()
b.createDAGstep()
b.createVolumes()
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if b.Timeout > 0 {
b.Workflow.Spec.Timeout = b.Timeout
}
b.Workflow.Spec.Entrypoint = "dag"
b.Workflow.ApiVersion = "argoproj.io/v1alpha1"
b.Workflow.Kind = "Workflow"
random_name := generateWfName()
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b.Workflow.Metadata.Name = "oc-monitor-" + random_name
logger = oclib.GetLogger()
yamlified, err := yaml.Marshal(b.Workflow)
if err != nil {
logger.Error().Msg("Could not transform object to yaml file")
return "", err
}
// Give a unique name to each argo file with its timestamp DD:MM:YYYY_hhmmss
current_timestamp := time.Now().Format("02_01_2006_150405")
file_name := random_name + "_" + current_timestamp + ".yml"
workflows_dir := "./argo_workflows/"
err = os.WriteFile(workflows_dir+file_name, []byte(yamlified), 0660)
if err != nil {
logger.Error().Msg("Could not write the yaml file")
return "", err
}
return file_name, nil
}
func (b *ArgoBuilder) createTemplates() {
for _, comp := range b.getProcessings() {
var command string
var args string
var env string
comp_res := comp.Processing
command = getStringValue(comp_res.AbstractResource, "command")
args = getStringValue(comp_res.AbstractResource, "args")
env = getStringValue(comp_res.AbstractResource, "env")
image_name := strings.Split(command, " ")[0] // TODO : decide where to store the image name, GUI or models.computing.Image
temp_container := Container{Image: image_name} // TODO : decide where to store the image name, GUI or models.computing.Image
temp_container.Command = getComputingCommands(command)
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temp_container.Args = getComputingArgs(args, command)
// Only for dev purpose,
input_names := getComputingEnvironmentName(strings.Split(env, " "))
var inputs_container []Parameter
for _, name := range input_names {
inputs_container = append(inputs_container, Parameter{Name: name})
}
argo_name := getArgoName(comp_res.GetName(), comp.ID)
new_temp := Template{Name: argo_name, Container: temp_container}
new_temp.Inputs.Parameters = inputs_container
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
if (b.isService(comp.ID)){
serv := b.CreateService(comp)
b.createService(serv, argo_name, comp.ID)
new_temp.Metadata.Labels = make(map[string]string)
new_temp.Metadata.Labels["app"] = "oc-service" // Construct the template for the k8s service and add a link in graph between k8s service and processing
// if err != nil {
// // TODO
// }
}
b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, new_temp)
}
if b.Services != nil {
b.addServiceToArgo()
}
}
func (b *ArgoBuilder) createDAGstep() {
new_dag := Dag{}
for _, comp := range b.getProcessings() {
comp_res := comp.Processing
env := getStringValue(comp_res.AbstractResource, "env")
unique_name := getArgoName(comp_res.GetName(), comp.ID)
step := Task{Name: unique_name, Template: unique_name}
comp_envs := getComputingEnvironment(strings.Split(env, " "))
for name, value := range comp_envs {
step.Arguments.Parameters = append(step.Arguments.Parameters, Parameter{Name: name, Value: value})
}
// retrieves the name (computing.name-computing.ID)
step.Dependencies = b.getDependency(comp.ID) // Error : we use the component ID instead of the GraphItem ID -> store objects
new_dag.Tasks = append(new_dag.Tasks, step)
}
if b.Services != nil {
new_dag.Tasks = append(new_dag.Tasks, Task{Name:"workflow-service-pod", Template: "workflow-service-pod"})
}
b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, Template{Name: "dag", Dag: new_dag})
}
func (b *ArgoBuilder) createVolumes() {
// For testing purposes we only declare one volume, mounted in each computing
new_volume := VolumeClaimTemplate{}
new_volume.Metadata.Name = "workdir"
new_volume.Spec.AccessModes = []string{"ReadWriteOnce"}
new_volume.Spec.Resources.Requests.Storage = "1Gi"
b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
}
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// For demo purposes, until we implement the use of storage ressources
func (b *ArgoBuilder) createNginxVolumes() {
new_volume := VolumeClaimTemplate{}
new_volume.Metadata.Name = "nginx-demo"
new_volume.Spec.AccessModes = []string{"ReadWriteOnce"}
new_volume.Spec.Resources.Requests.Storage = "1Gi"
b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
}
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 {
continue
}
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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 {
dependency_name := getArgoName(source.GetName(), link.Source.ID)
dependencies = append(dependencies, dependency_name)
}
}
return
}
func getComputingCommands(user_input string) []string {
user_input = removeImageName(user_input)
if len(user_input) == 0 {
return []string{}
}
return strings.Split(user_input, " ")
}
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func getComputingArgs(user_input string, command string) (list_args []string) {
if len(user_input) == 0 {
return
}
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args := strings.Split(user_input," ")
// quickfix that might need improvement
if strings.Contains(command, "sh -c") {
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list_args = append(list_args, strings.Join(args, " "))
return
}
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list_args = append(list_args, args...)
return
}
// Currently implements code to overcome problems in data structure
func getComputingEnvironment(user_input []string) (map_env map[string]string) {
logger := oclib.GetLogger()
is_empty := len(user_input) == 0
is_empty_string := len(user_input) == 1 && user_input[0] == ""
if is_empty || is_empty_string {
return
}
if len(user_input) == 1 {
user_input = strings.Split(user_input[0], ",")
}
map_env = make(map[string]string, 0)
for _, str := range user_input {
new_pair := strings.Split(str, "=")
if len(new_pair) != 2 {
logger.Error().Msg("Error extracting the environment variable from " + str)
panic(0)
}
map_env[new_pair[0]] = new_pair[1]
}
return
}
func getComputingEnvironmentName(user_input []string) (list_names []string) {
env_map := getComputingEnvironment(user_input)
for name := range env_map {
list_names = append(list_names, name)
}
return
}
func generateWfName() (Name string) {
Name = fakelish.GenerateFakeWord(5, 8) + "-" + fakelish.GenerateFakeWord(5, 8)
return
}
func getArgoName(raw_name string, component_id string) (formatedName string) {
formatedName = strings.ReplaceAll(raw_name, " ", "-")
formatedName += "-" + component_id
formatedName = strings.ToLower(formatedName)
return
}
func removeImageName(user_input string) string {
// First command is the name of the container for now
if len(strings.Split(user_input, " ")) == 1 {
return ""
}
slice_input := strings.Split(user_input, " ")
new_slice := slice_input[1:]
user_input = strings.Join(new_slice, " ")
return user_input
}
// 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
func (b *ArgoBuilder) getProcessings() (list_computings []graph.GraphItem) {
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for _, item := range b.OriginWorkflow.Graph.Items {
if item.Processing != nil {
list_computings = append(list_computings, item)
}
}
return
}
// Pass a GraphItem's UUID and not the ID
func (b *ArgoBuilder) IsProcessing(component_uuid string) bool {
return slices.Contains(b.OriginWorkflow.Processings, component_uuid)
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}
func getStringValue(comp resource_model.AbstractResource, key string) string {
if res := comp.GetModelValue(key); res != nil {
return res.(string)
}
return ""
}
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func (b *ArgoBuilder) isService(id string) bool{
comp := b.OriginWorkflow.Graph.Items[id]
if comp.Processing == nil {
return false
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}
_, is_exposed := comp.Processing.ResourceModel.Model["expose"]
return is_exposed
}
func (b *ArgoBuilder) addLabel(name string, id string) {
argo_name := getArgoName(name,id)
for _, template := range b.Workflow.Spec.Templates{
if template.Name == argo_name{
template.Metadata.Labels["app"] = "service-workflow"
return
}
}
}