1ecdc83a33
This implements the new algorithm for deciding which resources must be deleted due to a delete-before-replace operation. We need to compute the set of resources that may be replaced by a change to the resource under consideration. We do this by taking the complete set of transitive dependents on the resource under consideration and removing any resources that would not be replaced by changes to their dependencies. We determine whether or not a resource may be replaced by substituting unknowns for input properties that may change due to deletion of the resources their value depends on and calling the resource provider's Diff method. This is perhaps clearer when described by example. Consider the following dependency graph: A __|__ B C | _|_ D E F In this graph, all of B, C, D, E, and F transitively depend on A. It may be the case, however, that changes to the specific properties of any of those resources R that would occur if a resource on the path to A were deleted and recreated may not cause R to be replaced. For example, the edge from B to A may be a simple dependsOn edge such that a change to B does not actually influence any of B's input properties. In that case, neither B nor D would need to be deleted before A could be deleted. In order to make the above algorithm a reality, the resource monitor interface has been updated to include a map that associates an input property key with the list of resources that input property depends on. Older clients of the resource monitor will leave this map empty, in which case all input properties will be treated as depending on all dependencies of the resource. This is probably overly conservative, but it is less conservative than what we currently implement, and is certainly correct.
114 lines
3.4 KiB
Go
114 lines
3.4 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package operations
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import (
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"encoding/json"
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"io/ioutil"
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"testing"
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"github.com/davecgh/go-spew/spew"
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"github.com/stretchr/testify/assert"
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"github.com/pulumi/pulumi/pkg/apitype"
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"github.com/pulumi/pulumi/pkg/resource/stack"
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)
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func getPulumiResources(t *testing.T, path string) *Resource {
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var checkpoint apitype.CheckpointV3
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byts, err := ioutil.ReadFile(path)
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assert.NoError(t, err)
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err = json.Unmarshal(byts, &checkpoint)
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assert.NoError(t, err)
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snapshot, err := stack.DeserializeCheckpoint(&checkpoint)
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assert.NoError(t, err)
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resources := NewResourceTree(snapshot.Resources)
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spew.Dump(resources)
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return resources
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}
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func TestTodo(t *testing.T) {
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components := getPulumiResources(t, "testdata/todo.json")
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assert.Equal(t, 4, len(components.Children))
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// Table child
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table, ok := components.GetChild("cloud:table:Table", "todo")
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assert.True(t, ok)
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if !assert.NotNil(t, table) {
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return
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}
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assert.Equal(t, 2, len(table.State.Inputs))
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assert.Equal(t, "id", table.State.Inputs["primaryKey"].StringValue())
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assert.Equal(t, 1, len(table.Children))
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table, ok = table.GetChild("aws:dynamodb/table:Table", "todo")
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assert.True(t, ok)
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assert.NotNil(t, table)
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// Endpoint child
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endpoint, ok := components.GetChild("cloud:http:HttpEndpoint", "todo")
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assert.True(t, ok)
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if !assert.NotNil(t, endpoint) {
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return
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}
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assert.Equal(t, 5, len(endpoint.State.Inputs))
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assert.Equal(t,
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"https://eupwl7wu4i.execute-api.us-east-2.amazonaws.com/", endpoint.State.Inputs["url"].StringValue())
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assert.Equal(t, 14, len(endpoint.Children))
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endpoint, ok = endpoint.GetChild("aws:apigateway/restApi:RestApi", "todo")
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assert.True(t, ok)
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assert.NotNil(t, endpoint)
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// Nonexistant resource.
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r, ok := endpoint.GetChild("garden:ornimentation/gnome", "stone")
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assert.False(t, ok)
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assert.Nil(t, r)
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}
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func TestCrawler(t *testing.T) {
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components := getPulumiResources(t, "testdata/crawler.json")
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assert.Equal(t, 7, len(components.Children))
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// Topic child
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topic, ok := components.GetChild("cloud:topic:Topic", "countDown")
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assert.True(t, ok)
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if !assert.NotNil(t, topic) {
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return
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}
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assert.Equal(t, 0, len(topic.State.Inputs))
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assert.Equal(t, 1, len(topic.Children))
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topic, ok = topic.GetChild("aws:sns/topic:Topic", "countDown")
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assert.True(t, ok)
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assert.NotNil(t, topic)
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// Timer child
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heartbeat, ok := components.GetChild("cloud:timer:Timer", "heartbeat")
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assert.True(t, ok)
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if !assert.NotNil(t, heartbeat) {
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return
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}
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assert.Equal(t, 1, len(heartbeat.State.Inputs))
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assert.Equal(t, "rate(5 minutes)", heartbeat.State.Inputs["scheduleExpression"].StringValue())
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assert.Equal(t, 4, len(heartbeat.Children))
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// Function child of timer
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function, ok := heartbeat.GetChild("cloud:function:Function", "heartbeat")
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assert.True(t, ok)
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if !assert.NotNil(t, function) {
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return
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}
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assert.Equal(t, 1, len(function.State.Inputs))
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assert.Equal(t, 3, len(function.Children))
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}
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