feat(backend): support yaml with platform-specific specs

backend/src/apiserver/template/template.go

@@ -45,6 +45,7 @@ const (
 )
 
 var ErrorInvalidPipelineSpec = fmt.Errorf("pipeline spec is invalid")
+var ErrorInvalidPlatformSpec = fmt.Errorf("Platform spec is invalid")
 
 // inferTemplateFormat infers format from pipeline template.
 // There is no guarantee that the template is valid in inferred format, so validation

backend/src/apiserver/template/testdata/hello_world.yaml

@@ -0,0 +1,56 @@
+# this is a comment
+components:
+  comp-hello-world:
+    executorLabel: exec-hello-world
+    inputDefinitions:
+      parameters:
+        text:
+          type: STRING
+deploymentSpec:
+  executors:
+    exec-hello-world:
+      container:
+        args:
+        - "--text"
+        - "{{$.inputs.parameters['text']}}"
+        command:
+        - sh
+        - "-ec"
+        - |
+          program_path=$(mktemp)
+          printf "%s" "$0" > "$program_path"
+          python3 -u "$program_path" "$@"
+        - |
+          def hello_world(text):
+              print(text)
+              return text
+
+          import argparse
+          _parser = argparse.ArgumentParser(prog='Hello world', description='')
+          _parser.add_argument("--text", dest="text", type=str, required=True, default=argparse.SUPPRESS)
+          _parsed_args = vars(_parser.parse_args())
+
+          _outputs = hello_world(**_parsed_args)
+        image: python:3.7
+pipelineInfo:
+  name: namespace/n1/pipeline/hello-world
+root:
+  dag:
+    tasks:
+      hello-world:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-hello-world
+        inputs:
+          parameters:
+            text:
+              componentInputParameter: text
+        taskInfo:
+          name: hello-world
+  inputDefinitions:
+    parameters:
+      text:
+        type: STRING
+schemaVersion: 2.0.0
+sdkVersion: kfp-1.6.5

backend/src/apiserver/template/testdata/pipeline_with_volume.yaml

@@ -0,0 +1,218 @@
+# PIPELINE DEFINITION
+# Name: my-pipeline
+components:
+  comp-comp:
+    executorLabel: exec-comp
+  comp-comp-2:
+    executorLabel: exec-comp-2
+  comp-comp-3:
+    executorLabel: exec-comp-3
+  comp-createpvc:
+    executorLabel: exec-createpvc
+    inputDefinitions:
+      parameters:
+        access_modes:
+          parameterType: LIST
+        annotations:
+          isOptional: true
+          parameterType: STRUCT
+        pvc_name:
+          isOptional: true
+          parameterType: STRING
+        pvc_name_suffix:
+          isOptional: true
+          parameterType: STRING
+        size:
+          parameterType: STRING
+        storage_class:
+          defaultValue: ''
+          isOptional: true
+          parameterType: STRING
+        volume_name:
+          isOptional: true
+          parameterType: STRING
+    outputDefinitions:
+      parameters:
+        name:
+          parameterType: STRING
+  comp-deletepvc:
+    executorLabel: exec-deletepvc
+    inputDefinitions:
+      parameters:
+        pvc_name:
+          parameterType: STRING
+deploymentSpec:
+  executors:
+    exec-comp:
+      container:
+        args:
+        - --executor_input
+        - '{{$}}'
+        - --function_to_execute
+        - comp
+        command:
+        - sh
+        - -c
+        - "\nif ! [ -x \"$(command -v pip)\" ]; then\n    python3 -m ensurepip ||\
+          \ python3 -m ensurepip --user || apt-get install python3-pip\nfi\n\nPIP_DISABLE_PIP_VERSION_CHECK=1\
+          \ python3 -m pip install --quiet     --no-warn-script-location 'kfp==2.0.0-beta.13'\
+          \ && \"$0\" \"$@\"\n"
+        - sh
+        - -ec
+        - 'program_path=$(mktemp -d)
+
+          printf "%s" "$0" > "$program_path/ephemeral_component.py"
+
+          python3 -m kfp.components.executor_main                         --component_module_path                         "$program_path/ephemeral_component.py"                         "$@"
+
+          '
+        - "\nimport kfp\nfrom kfp import dsl\nfrom kfp.dsl import *\nfrom typing import\
+          \ *\n\ndef comp():\n    pass\n\n"
+        image: python:3.7
+    exec-comp-2:
+      container:
+        args:
+        - --executor_input
+        - '{{$}}'
+        - --function_to_execute
+        - comp
+        command:
+        - sh
+        - -c
+        - "\nif ! [ -x \"$(command -v pip)\" ]; then\n    python3 -m ensurepip ||\
+          \ python3 -m ensurepip --user || apt-get install python3-pip\nfi\n\nPIP_DISABLE_PIP_VERSION_CHECK=1\
+          \ python3 -m pip install --quiet     --no-warn-script-location 'kfp==2.0.0-beta.13'\
+          \ && \"$0\" \"$@\"\n"
+        - sh
+        - -ec
+        - 'program_path=$(mktemp -d)
+
+          printf "%s" "$0" > "$program_path/ephemeral_component.py"
+
+          python3 -m kfp.components.executor_main                         --component_module_path                         "$program_path/ephemeral_component.py"                         "$@"
+
+          '
+        - "\nimport kfp\nfrom kfp import dsl\nfrom kfp.dsl import *\nfrom typing import\
+          \ *\n\ndef comp():\n    pass\n\n"
+        image: python:3.7
+    exec-comp-3:
+      container:
+        args:
+        - --executor_input
+        - '{{$}}'
+        - --function_to_execute
+        - comp
+        command:
+        - sh
+        - -c
+        - "\nif ! [ -x \"$(command -v pip)\" ]; then\n    python3 -m ensurepip ||\
+          \ python3 -m ensurepip --user || apt-get install python3-pip\nfi\n\nPIP_DISABLE_PIP_VERSION_CHECK=1\
+          \ python3 -m pip install --quiet     --no-warn-script-location 'kfp==2.0.0-beta.13'\
+          \ && \"$0\" \"$@\"\n"
+        - sh
+        - -ec
+        - 'program_path=$(mktemp -d)
+
+          printf "%s" "$0" > "$program_path/ephemeral_component.py"
+
+          python3 -m kfp.components.executor_main                         --component_module_path                         "$program_path/ephemeral_component.py"                         "$@"
+
+          '
+        - "\nimport kfp\nfrom kfp import dsl\nfrom kfp.dsl import *\nfrom typing import\
+          \ *\n\ndef comp():\n    pass\n\n"
+        image: python:3.7
+    exec-createpvc:
+      container:
+        image: argostub/createpvc
+    exec-deletepvc:
+      container:
+        image: argostub/deletepvc
+pipelineInfo:
+  name: my-pipeline
+root:
+  dag:
+    tasks:
+      comp:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-comp
+        taskInfo:
+          name: comp
+      comp-2:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-comp-2
+        dependentTasks:
+        - comp
+        taskInfo:
+          name: comp-2
+      comp-3:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-comp-3
+        taskInfo:
+          name: comp-3
+      createpvc:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-createpvc
+        inputs:
+          parameters:
+            access_modes:
+              runtimeValue:
+                constant:
+                - ReadWriteMany
+            pvc_name_suffix:
+              runtimeValue:
+                constant: -my-pvc
+            size:
+              runtimeValue:
+                constant: 5Gi
+            storage_class:
+              runtimeValue:
+                constant: standard
+        taskInfo:
+          name: createpvc
+      deletepvc:
+        cachingOptions:
+          enableCache: true
+        componentRef:
+          name: comp-deletepvc
+        dependentTasks:
+        - comp-2
+        - createpvc
+        inputs:
+          parameters:
+            pvc_name:
+              taskOutputParameter:
+                outputParameterKey: name
+                producerTask: createpvc
+        taskInfo:
+          name: deletepvc
+schemaVersion: 2.1.0
+sdkVersion: kfp-2.0.0-beta.13
+---
+platforms:
+  kubernetes:
+    deploymentSpec:
+      executors:
+        exec-comp:
+          pvcMount:
+          - mountPath: /data
+            taskOutputParameter:
+              outputParameterKey: name
+              producerTask: createpvc
+        exec-comp-2:
+          pvcMount:
+          - mountPath: /reused_data
+            taskOutputParameter:
+              outputParameterKey: name
+              producerTask: createpvc
+        exec-comp-3:
+          pvcMount:
+          - constant: my-existing-pvc
+            mountPath: /data