Adding the new state structures
This commit is contained in:
Armon Dadgar
parent
7d1d9bab79
commit
5dc37bafe6
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@ -1,181 +1,121 @@
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package terraform
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import (
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"bytes"
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"encoding/gob"
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"errors"
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"fmt"
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"io"
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"sort"
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"sync"
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"github.com/hashicorp/terraform/config"
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)
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// State keeps track of a snapshot state-of-the-world that Terraform
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// can use to keep track of what real world resources it is actually
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// managing.
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// managing. This is the latest format as of Terraform 0.3
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type State struct {
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Outputs map[string]string
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Resources map[string]*ResourceState
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Tainted map[string]struct{}
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// Version is the protocol version. Currently only "1".
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Version int `json:"version"`
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once sync.Once
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// Serial is incremented on any operation that modifies
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// the State file. It is used to detect potentially conflicting
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// updates.
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Serial int64 `json:"serial"`
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// Modules contains all the modules in a breadth-first order
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Modules []*ModuleState `json:"modules"`
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}
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func (s *State) init() {
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s.once.Do(func() {
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if s.Resources == nil {
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s.Resources = make(map[string]*ResourceState)
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// ModuleState is used to track all the state relevant to a single
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// module. Previous to Terraform 0.3, all state belonged to the "root"
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// module.
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type ModuleState struct {
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// Path is the import path from the root module. Modules imports are
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// always disjoint, so the path represents amodule tree
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Path []string `json:"path"`
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// Outputs declared by the module and maintained for each module
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// even though only the root module technically needs to be kept.
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// This allows operators to inspect values at the boundaries.
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Outputs map[string]string `json:"outputs"`
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// Resources is a mapping of the logically named resource to
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// the state of the resource. Each resource may actually have
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// N instances underneath, although a user only needs to think
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// about the 1:1 case.
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Resources map[string]*ResourceState `json:"resources"`
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}
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if s.Tainted == nil {
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s.Tainted = make(map[string]struct{})
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}
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})
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// ResourceState holds the state of a resource that is used so that
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// a provider can find and manage an existing resource as well as for
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// storing attributes that are used to populate variables of child
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// resources.
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//
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// Attributes has attributes about the created resource that are
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// queryable in interpolation: "${type.id.attr}"
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//
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// Extra is just extra data that a provider can return that we store
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// for later, but is not exposed in any way to the user.
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//
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type ResourceState struct {
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// This is filled in and managed by Terraform, and is the resource
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// type itself such as "mycloud_instance". If a resource provider sets
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// this value, it won't be persisted.
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Type string `json:"type"`
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// Dependencies are a list of things that this resource relies on
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// existing to remain intact. For example: an AWS instance might
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// depend on a subnet (which itself might depend on a VPC, and so
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// on).
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//
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// Terraform uses this information to build valid destruction
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// orders and to warn the user if they're destroying a resource that
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// another resource depends on.
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//
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// Things can be put into this list that may not be managed by
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// Terraform. If Terraform doesn't find a matching ID in the
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// overall state, then it assumes it isn't managed and doesn't
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// worry about it.
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Dependencies []string `json:"depends_on,omitempty"`
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// Instances is used to track all of the underlying instances
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// have been created as part of this logical resource. In the
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// standard case, there is only a single underlying instance.
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// However, in pathological cases, it is possible for the number
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// of instances to accumulate. The first instance in the list is
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// the "primary" and the others should be removed on subsequent
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// apply operations.
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Instances []*InstanceState `json:"instances"`
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}
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func (s *State) deepcopy() *State {
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result := new(State)
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result.init()
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if s != nil {
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for k, v := range s.Resources {
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result.Resources[k] = v
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}
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for k, v := range s.Tainted {
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result.Tainted[k] = v
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}
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// InstanceState is used to track the unique state information belonging
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// to a given instance.
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type InstanceState struct {
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// A unique ID for this resource. This is opaque to Terraform
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// and is only meant as a lookup mechanism for the providers.
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ID string `json:"id"`
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// Tainted is used to mark a resource as existing but being in
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// an unknown or errored state. Hence, it is 'tainted' and should
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// be destroyed and replaced on the next fun.
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Tainted bool `json:"tainted,omitempty"`
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// Attributes are basic information about the resource. Any keys here
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// are accessible in variable format within Terraform configurations:
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// ${resourcetype.name.attribute}.
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Attributes map[string]string `json:"attributes,omitempty"`
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// Ephemeral is used to store any state associated with this instance
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// that is necessary for the Terraform run to complete, but is not
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// persisted to a state file.
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Ephemeral EphemeralState `json:"-"`
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}
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return result
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// EphemeralState is used for transient state that is only kept in-memory
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type EphemeralState struct {
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// ConnInfo is used for the providers to export information which is
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// used to connect to the resource for provisioning. For example,
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// this could contain SSH or WinRM credentials.
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ConnInfo map[string]string `json:"-"`
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}
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// prune is a helper that removes any empty IDs from the state
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// and cleans it up in general.
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func (s *State) prune() {
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for k, v := range s.Resources {
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if v.ID == "" {
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delete(s.Resources, k)
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}
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}
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}
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// Orphans returns a list of keys of resources that are in the State
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// but aren't present in the configuration itself. Hence, these keys
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// represent the state of resources that are orphans.
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func (s *State) Orphans(c *config.Config) []string {
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keys := make(map[string]struct{})
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for k, _ := range s.Resources {
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keys[k] = struct{}{}
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}
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for _, r := range c.Resources {
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delete(keys, r.Id())
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// Mark all the counts as not orphans.
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for i := 0; i < r.Count; i++ {
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delete(keys, fmt.Sprintf("%s.%d", r.Id(), i))
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}
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}
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result := make([]string, 0, len(keys))
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for k, _ := range keys {
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result = append(result, k)
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}
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return result
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}
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func (s *State) String() string {
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if len(s.Resources) == 0 {
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return "<no state>"
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}
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var buf bytes.Buffer
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names := make([]string, 0, len(s.Resources))
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for name, _ := range s.Resources {
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names = append(names, name)
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}
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sort.Strings(names)
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for _, k := range names {
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rs := s.Resources[k]
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id := rs.ID
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if id == "" {
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id = "<not created>"
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}
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taintStr := ""
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if _, ok := s.Tainted[k]; ok {
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taintStr = " (tainted)"
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}
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buf.WriteString(fmt.Sprintf("%s:%s\n", k, taintStr))
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buf.WriteString(fmt.Sprintf(" ID = %s\n", id))
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attrKeys := make([]string, 0, len(rs.Attributes))
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for ak, _ := range rs.Attributes {
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if ak == "id" {
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continue
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}
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attrKeys = append(attrKeys, ak)
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}
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sort.Strings(attrKeys)
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for _, ak := range attrKeys {
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av := rs.Attributes[ak]
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buf.WriteString(fmt.Sprintf(" %s = %s\n", ak, av))
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}
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if len(rs.Dependencies) > 0 {
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buf.WriteString(fmt.Sprintf("\n Dependencies:\n"))
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for _, dep := range rs.Dependencies {
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buf.WriteString(fmt.Sprintf(" %s\n", dep.ID))
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}
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}
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}
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if len(s.Outputs) > 0 {
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buf.WriteString("\nOutputs:\n\n")
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ks := make([]string, 0, len(s.Outputs))
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for k, _ := range s.Outputs {
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ks = append(ks, k)
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}
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sort.Strings(ks)
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for _, k := range ks {
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v := s.Outputs[k]
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buf.WriteString(fmt.Sprintf("%s = %s\n", k, v))
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}
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}
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return buf.String()
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}
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// sensitiveState is used to store sensitive state information
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// that should not be serialized. This is only used temporarily
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// and is restored into the state.
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type sensitiveState struct {
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ConnInfo map[string]map[string]string
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once sync.Once
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}
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func (s *sensitiveState) init() {
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s.once.Do(func() {
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s.ConnInfo = make(map[string]map[string]string)
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})
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}
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// The format byte is prefixed into the state file format so that we have
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// the ability in the future to change the file format if we want for any
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// reason.
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const stateFormatMagic = "tfstate"
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const stateFormatVersion byte = 1
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// ReadState reads a state structure out of a reader in the format that
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// was written by WriteState.
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func ReadState(src io.Reader) (*State, error) {
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@ -258,108 +198,3 @@ func WriteState(d *State, dst io.Writer) error {
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return err
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}
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// ResourceState holds the state of a resource that is used so that
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// a provider can find and manage an existing resource as well as for
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// storing attributes that are uesd to populate variables of child
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// resources.
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//
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// Attributes has attributes about the created resource that are
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// queryable in interpolation: "${type.id.attr}"
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//
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// Extra is just extra data that a provider can return that we store
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// for later, but is not exposed in any way to the user.
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type ResourceState struct {
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// This is filled in and managed by Terraform, and is the resource
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// type itself such as "mycloud_instance". If a resource provider sets
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// this value, it won't be persisted.
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Type string
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// The attributes below are all meant to be filled in by the
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// resource providers themselves. Documentation for each are above
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// each element.
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// A unique ID for this resource. This is opaque to Terraform
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// and is only meant as a lookup mechanism for the providers.
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ID string
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// Attributes are basic information about the resource. Any keys here
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// are accessible in variable format within Terraform configurations:
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// ${resourcetype.name.attribute}.
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Attributes map[string]string
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// ConnInfo is used for the providers to export information which is
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// used to connect to the resource for provisioning. For example,
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// this could contain SSH or WinRM credentials.
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ConnInfo map[string]string
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// Extra information that the provider can store about a resource.
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// This data is opaque, never shown to the user, and is sent back to
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// the provider as-is for whatever purpose appropriate.
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Extra map[string]interface{}
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// Dependencies are a list of things that this resource relies on
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// existing to remain intact. For example: an AWS instance might
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// depend on a subnet (which itself might depend on a VPC, and so
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// on).
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//
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// Terraform uses this information to build valid destruction
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// orders and to warn the user if they're destroying a resource that
|
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// another resource depends on.
|
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//
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// Things can be put into this list that may not be managed by
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// Terraform. If Terraform doesn't find a matching ID in the
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// overall state, then it assumes it isn't managed and doesn't
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// worry about it.
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Dependencies []ResourceDependency
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}
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// MergeDiff takes a ResourceDiff and merges the attributes into
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// this resource state in order to generate a new state. This new
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// state can be used to provide updated attribute lookups for
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// variable interpolation.
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//
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// If the diff attribute requires computing the value, and hence
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// won't be available until apply, the value is replaced with the
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// computeID.
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func (s *ResourceState) MergeDiff(d *ResourceDiff) *ResourceState {
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var result ResourceState
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if s != nil {
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result = *s
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}
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result.Attributes = make(map[string]string)
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if s != nil {
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for k, v := range s.Attributes {
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result.Attributes[k] = v
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}
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}
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if d != nil {
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for k, diff := range d.Attributes {
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if diff.NewRemoved {
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delete(result.Attributes, k)
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continue
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}
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if diff.NewComputed {
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result.Attributes[k] = config.UnknownVariableValue
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continue
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}
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result.Attributes[k] = diff.New
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}
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}
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return &result
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}
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func (s *ResourceState) GoString() string {
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return fmt.Sprintf("*%#v", *s)
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}
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// ResourceDependency maps a resource to another resource that it
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// depends on to remain intact and uncorrupted.
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type ResourceDependency struct {
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// ID of the resource that we depend on. This ID should map
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// directly to another ResourceState's ID.
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ID string
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}
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@ -0,0 +1,279 @@
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package terraform
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import (
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"bytes"
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"fmt"
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"sort"
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"sync"
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"github.com/hashicorp/terraform/config"
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)
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// StateV1 is used to represent the state of Terraform files before
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// 0.3. It is automatically upgraded to a modern State representation
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// on start.
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type StateV1 struct {
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Outputs map[string]string
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Resources map[string]*ResourceState
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Tainted map[string]struct{}
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once sync.Once
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}
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func (s *State) init() {
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s.once.Do(func() {
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if s.Resources == nil {
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s.Resources = make(map[string]*ResourceState)
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}
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if s.Tainted == nil {
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s.Tainted = make(map[string]struct{})
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}
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})
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}
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func (s *State) deepcopy() *State {
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result := new(State)
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result.init()
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if s != nil {
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for k, v := range s.Resources {
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result.Resources[k] = v
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}
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for k, v := range s.Tainted {
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result.Tainted[k] = v
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}
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}
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return result
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}
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|
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// prune is a helper that removes any empty IDs from the state
|
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// and cleans it up in general.
|
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func (s *State) prune() {
|
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for k, v := range s.Resources {
|
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if v.ID == "" {
|
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delete(s.Resources, k)
|
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}
|
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}
|
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}
|
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|
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// Orphans returns a list of keys of resources that are in the State
|
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// but aren't present in the configuration itself. Hence, these keys
|
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// represent the state of resources that are orphans.
|
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func (s *State) Orphans(c *config.Config) []string {
|
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keys := make(map[string]struct{})
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for k, _ := range s.Resources {
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keys[k] = struct{}{}
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}
|
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|
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for _, r := range c.Resources {
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delete(keys, r.Id())
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|
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// Mark all the counts as not orphans.
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for i := 0; i < r.Count; i++ {
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delete(keys, fmt.Sprintf("%s.%d", r.Id(), i))
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}
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}
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result := make([]string, 0, len(keys))
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for k, _ := range keys {
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result = append(result, k)
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}
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return result
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}
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|
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func (s *State) String() string {
|
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if len(s.Resources) == 0 {
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return "<no state>"
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}
|
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|
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var buf bytes.Buffer
|
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|
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names := make([]string, 0, len(s.Resources))
|
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for name, _ := range s.Resources {
|
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names = append(names, name)
|
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}
|
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sort.Strings(names)
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|
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for _, k := range names {
|
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rs := s.Resources[k]
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id := rs.ID
|
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if id == "" {
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id = "<not created>"
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}
|
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|
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taintStr := ""
|
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if _, ok := s.Tainted[k]; ok {
|
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taintStr = " (tainted)"
|
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}
|
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|
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buf.WriteString(fmt.Sprintf("%s:%s\n", k, taintStr))
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buf.WriteString(fmt.Sprintf(" ID = %s\n", id))
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|
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attrKeys := make([]string, 0, len(rs.Attributes))
|
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for ak, _ := range rs.Attributes {
|
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if ak == "id" {
|
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continue
|
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}
|
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|
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attrKeys = append(attrKeys, ak)
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}
|
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sort.Strings(attrKeys)
|
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|
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for _, ak := range attrKeys {
|
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av := rs.Attributes[ak]
|
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buf.WriteString(fmt.Sprintf(" %s = %s\n", ak, av))
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}
|
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|
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if len(rs.Dependencies) > 0 {
|
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buf.WriteString(fmt.Sprintf("\n Dependencies:\n"))
|
||||
for _, dep := range rs.Dependencies {
|
||||
buf.WriteString(fmt.Sprintf(" %s\n", dep.ID))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if len(s.Outputs) > 0 {
|
||||
buf.WriteString("\nOutputs:\n\n")
|
||||
|
||||
ks := make([]string, 0, len(s.Outputs))
|
||||
for k, _ := range s.Outputs {
|
||||
ks = append(ks, k)
|
||||
}
|
||||
sort.Strings(ks)
|
||||
|
||||
for _, k := range ks {
|
||||
v := s.Outputs[k]
|
||||
buf.WriteString(fmt.Sprintf("%s = %s\n", k, v))
|
||||
}
|
||||
}
|
||||
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
// sensitiveState is used to store sensitive state information
|
||||
// that should not be serialized. This is only used temporarily
|
||||
// and is restored into the state.
|
||||
type sensitiveState struct {
|
||||
ConnInfo map[string]map[string]string
|
||||
|
||||
once sync.Once
|
||||
}
|
||||
|
||||
func (s *sensitiveState) init() {
|
||||
s.once.Do(func() {
|
||||
s.ConnInfo = make(map[string]map[string]string)
|
||||
})
|
||||
}
|
||||
|
||||
// The format byte is prefixed into the state file format so that we have
|
||||
// the ability in the future to change the file format if we want for any
|
||||
// reason.
|
||||
const stateFormatMagic = "tfstate"
|
||||
const stateFormatVersion byte = 1
|
||||
|
||||
/// ResourceState holds the state of a resource that is used so that
|
||||
// a provider can find and manage an existing resource as well as for
|
||||
// storing attributes that are uesd to populate variables of child
|
||||
// resources.
|
||||
//
|
||||
// Attributes has attributes about the created resource that are
|
||||
// queryable in interpolation: "${type.id.attr}"
|
||||
//
|
||||
// Extra is just extra data that a provider can return that we store
|
||||
// for later, but is not exposed in any way to the user.
|
||||
type ResourceStateV1 struct {
|
||||
// This is filled in and managed by Terraform, and is the resource
|
||||
// type itself such as "mycloud_instance". If a resource provider sets
|
||||
// this value, it won't be persisted.
|
||||
Type string
|
||||
|
||||
// The attributes below are all meant to be filled in by the
|
||||
// resource providers themselves. Documentation for each are above
|
||||
// each element.
|
||||
|
||||
// A unique ID for this resource. This is opaque to Terraform
|
||||
// and is only meant as a lookup mechanism for the providers.
|
||||
ID string
|
||||
|
||||
// Attributes are basic information about the resource. Any keys here
|
||||
// are accessible in variable format within Terraform configurations:
|
||||
// ${resourcetype.name.attribute}.
|
||||
Attributes map[string]string
|
||||
|
||||
// ConnInfo is used for the providers to export information which is
|
||||
// used to connect to the resource for provisioning. For example,
|
||||
// this could contain SSH or WinRM credentials.
|
||||
ConnInfo map[string]string
|
||||
|
||||
// Extra information that the provider can store about a resource.
|
||||
// This data is opaque, never shown to the user, and is sent back to
|
||||
// the provider as-is for whatever purpose appropriate.
|
||||
Extra map[string]interface{}
|
||||
|
||||
// Dependencies are a list of things that this resource relies on
|
||||
// existing to remain intact. For example: an AWS instance might
|
||||
// depend on a subnet (which itself might depend on a VPC, and so
|
||||
// on).
|
||||
//
|
||||
// Terraform uses this information to build valid destruction
|
||||
// orders and to warn the user if they're destroying a resource that
|
||||
// another resource depends on.
|
||||
//
|
||||
// Things can be put into this list that may not be managed by
|
||||
// Terraform. If Terraform doesn't find a matching ID in the
|
||||
// overall state, then it assumes it isn't managed and doesn't
|
||||
// worry about it.
|
||||
Dependencies []ResourceDependency
|
||||
}
|
||||
|
||||
// MergeDiff takes a ResourceDiff and merges the attributes into
|
||||
// this resource state in order to generate a new state. This new
|
||||
// state can be used to provide updated attribute lookups for
|
||||
// variable interpolation.
|
||||
//
|
||||
// If the diff attribute requires computing the value, and hence
|
||||
// won't be available until apply, the value is replaced with the
|
||||
// computeID.
|
||||
func (s *ResourceState) MergeDiff(d *ResourceDiff) *ResourceState {
|
||||
var result ResourceState
|
||||
if s != nil {
|
||||
result = *s
|
||||
}
|
||||
|
||||
result.Attributes = make(map[string]string)
|
||||
if s != nil {
|
||||
for k, v := range s.Attributes {
|
||||
result.Attributes[k] = v
|
||||
}
|
||||
}
|
||||
if d != nil {
|
||||
for k, diff := range d.Attributes {
|
||||
if diff.NewRemoved {
|
||||
delete(result.Attributes, k)
|
||||
continue
|
||||
}
|
||||
if diff.NewComputed {
|
||||
result.Attributes[k] = config.UnknownVariableValue
|
||||
continue
|
||||
}
|
||||
|
||||
result.Attributes[k] = diff.New
|
||||
}
|
||||
}
|
||||
|
||||
return &result
|
||||
}
|
||||
|
||||
func (s *ResourceState) GoString() string {
|
||||
return fmt.Sprintf("*%#v", *s)
|
||||
}
|
||||
|
||||
// ResourceDependency maps a resource to another resource that it
|
||||
// depends on to remain intact and uncorrupted.
|
||||
type ResourceDependency struct {
|
||||
// ID of the resource that we depend on. This ID should map
|
||||
// directly to another ResourceState's ID.
|
||||
ID string
|
||||
}
|
||||
Loading…
Reference in New Issue