|
| 1 | +package cmd |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "fmt" |
| 6 | + "github.com/hashicorp/hcl/v2" |
| 7 | + "github.com/hashicorp/hcl/v2/hclwrite" |
| 8 | + "github.com/kaytu-io/kaytu/pkg/github" |
| 9 | + plugin2 "github.com/kaytu-io/kaytu/pkg/plugin" |
| 10 | + "github.com/kaytu-io/kaytu/pkg/plugin/proto/src/golang" |
| 11 | + "github.com/kaytu-io/kaytu/pkg/server" |
| 12 | + "github.com/kaytu-io/kaytu/pkg/utils" |
| 13 | + "github.com/kaytu-io/kaytu/preferences" |
| 14 | + "github.com/spf13/cobra" |
| 15 | + "github.com/zclconf/go-cty/cty" |
| 16 | + "regexp" |
| 17 | + "strconv" |
| 18 | + "strings" |
| 19 | + "time" |
| 20 | +) |
| 21 | + |
| 22 | +var terraformCmd = &cobra.Command{ |
| 23 | + Use: "terraform", |
| 24 | + Short: "Create pull request for right sizing opportunities on your terraform git", |
| 25 | + Long: "Create pull request for right sizing opportunities on your terraform git", |
| 26 | + RunE: func(cmd *cobra.Command, args []string) error { |
| 27 | + ignoreYoungerThan := utils.ReadIntFlag(cmd, "ignore-younger-than") |
| 28 | + contentBytes, err := github.GetFile( |
| 29 | + utils.ReadStringFlag(cmd, "github-owner"), |
| 30 | + utils.ReadStringFlag(cmd, "github-repo"), |
| 31 | + utils.ReadStringFlag(cmd, "terraform-file-path"), |
| 32 | + utils.ReadStringFlag(cmd, "github-username"), |
| 33 | + utils.ReadStringFlag(cmd, "github-token"), |
| 34 | + ) |
| 35 | + if err != nil { |
| 36 | + return err |
| 37 | + } |
| 38 | + |
| 39 | + manager := plugin2.New() |
| 40 | + manager.SetNonInteractiveView() |
| 41 | + err = manager.StartServer() |
| 42 | + if err != nil { |
| 43 | + return err |
| 44 | + } |
| 45 | + err = manager.StartPlugin("rds-instance") |
| 46 | + if err != nil { |
| 47 | + return err |
| 48 | + } |
| 49 | + for i := 0; i < 100; i++ { |
| 50 | + runningPlg := manager.GetPlugin("kaytu-io/plugin-aws") |
| 51 | + if runningPlg != nil { |
| 52 | + break |
| 53 | + } |
| 54 | + time.Sleep(100 * time.Millisecond) |
| 55 | + } |
| 56 | + runningPlg := manager.GetPlugin("kaytu-io/plugin-aws") |
| 57 | + if runningPlg == nil { |
| 58 | + return fmt.Errorf("running plugin not found") |
| 59 | + } |
| 60 | + cfg, err := server.GetConfig() |
| 61 | + if err != nil { |
| 62 | + return err |
| 63 | + } |
| 64 | + |
| 65 | + for _, rcmd := range runningPlg.Plugin.Config.Commands { |
| 66 | + if rcmd.Name == "rds-instance" { |
| 67 | + preferences.Update(rcmd.DefaultPreferences) |
| 68 | + |
| 69 | + if rcmd.LoginRequired && cfg.AccessToken == "" { |
| 70 | + // login |
| 71 | + return fmt.Errorf("please login") |
| 72 | + } |
| 73 | + break |
| 74 | + } |
| 75 | + } |
| 76 | + err = runningPlg.Stream.Send(&golang.ServerMessage{ |
| 77 | + ServerMessage: &golang.ServerMessage_Start{ |
| 78 | + Start: &golang.StartProcess{ |
| 79 | + Command: "rds-instance", |
| 80 | + Flags: nil, |
| 81 | + KaytuAccessToken: cfg.AccessToken, |
| 82 | + }, |
| 83 | + }, |
| 84 | + }) |
| 85 | + if err != nil { |
| 86 | + return err |
| 87 | + } |
| 88 | + jsonOutput, err := manager.NonInteractiveView.WaitAndReturnResults("json") |
| 89 | + if err != nil { |
| 90 | + return err |
| 91 | + } |
| 92 | + |
| 93 | + var jsonObj struct { |
| 94 | + Items []*golang.OptimizationItem |
| 95 | + } |
| 96 | + err = json.Unmarshal([]byte(jsonOutput), &jsonObj) |
| 97 | + if err != nil { |
| 98 | + return err |
| 99 | + } |
| 100 | + |
| 101 | + recommendation := map[string]string{} |
| 102 | + rightSizingDescription := map[string]string{} |
| 103 | + for _, item := range jsonObj.Items { |
| 104 | + var recommendedInstanceSize string |
| 105 | + maxRuntimeHours := int64(1) // since default for ignoreYoungerThan is 1 |
| 106 | + for _, device := range item.Devices { |
| 107 | + for _, property := range device.Properties { |
| 108 | + if property.Key == "RuntimeHours" { |
| 109 | + i, _ := strconv.ParseInt(property.Current, 10, 64) |
| 110 | + maxRuntimeHours = max(maxRuntimeHours, i) |
| 111 | + } |
| 112 | + if property.Key == "Instance Size" && property.Current != property.Recommended { |
| 113 | + recommendedInstanceSize = property.Recommended |
| 114 | + } |
| 115 | + } |
| 116 | + } |
| 117 | + |
| 118 | + if maxRuntimeHours < ignoreYoungerThan { |
| 119 | + continue |
| 120 | + } |
| 121 | + if recommendedInstanceSize == "" { |
| 122 | + continue |
| 123 | + } |
| 124 | + recommendation[item.Id] = recommendedInstanceSize |
| 125 | + rightSizingDescription[item.Id] = item.Description |
| 126 | + } |
| 127 | + |
| 128 | + file, diags := hclwrite.ParseConfig(contentBytes, "filename.tf", hcl.InitialPos) |
| 129 | + if diags.HasErrors() { |
| 130 | + return fmt.Errorf("%s", diags.Error()) |
| 131 | + } |
| 132 | + |
| 133 | + body := file.Body() |
| 134 | + localVars := map[string]string{} |
| 135 | + countRightSized := 0 |
| 136 | + var rightSizedIds []string |
| 137 | + for _, block := range body.Blocks() { |
| 138 | + if block.Type() == "locals" { |
| 139 | + for k, v := range block.Body().Attributes() { |
| 140 | + value := strings.TrimSpace(string(v.Expr().BuildTokens(hclwrite.Tokens{}).Bytes())) |
| 141 | + |
| 142 | + localVars[k] = value |
| 143 | + } |
| 144 | + } |
| 145 | + if block.Type() == "module" { |
| 146 | + identifier := block.Body().GetAttribute("identifier") |
| 147 | + if identifier == nil { |
| 148 | + continue |
| 149 | + } |
| 150 | + |
| 151 | + value := strings.TrimSpace(string(identifier.Expr().BuildTokens(hclwrite.Tokens{}).Bytes())) |
| 152 | + value = resolveValue(localVars, value) |
| 153 | + |
| 154 | + var instanceUseIdentifierPrefixBool bool |
| 155 | + instanceUseIdentifierPrefix := block.Body().GetAttribute("instance_use_identifier_prefix") |
| 156 | + if instanceUseIdentifierPrefix != nil { |
| 157 | + boolValue := strings.TrimSpace(string(instanceUseIdentifierPrefix.Expr().BuildTokens(hclwrite.Tokens{}).Bytes())) |
| 158 | + instanceUseIdentifierPrefixBool = boolValue == "true" |
| 159 | + } |
| 160 | + |
| 161 | + if instanceUseIdentifierPrefixBool { |
| 162 | + for k, v := range recommendation { |
| 163 | + if strings.HasPrefix(k, value) { |
| 164 | + dbNameAttr := block.Body().GetAttribute("db_name") |
| 165 | + if dbNameAttr != nil { |
| 166 | + block.Body().SetAttributeValue("instance_class", cty.StringVal(v)) |
| 167 | + countRightSized++ |
| 168 | + rightSizedIds = append(rightSizedIds, k) |
| 169 | + } |
| 170 | + } |
| 171 | + } |
| 172 | + } else { |
| 173 | + if _, ok := recommendation[value]; ok { |
| 174 | + dbNameAttr := block.Body().GetAttribute("db_name") |
| 175 | + if dbNameAttr != nil { |
| 176 | + block.Body().SetAttributeValue("instance_class", cty.StringVal(recommendation[value])) |
| 177 | + countRightSized++ |
| 178 | + rightSizedIds = append(rightSizedIds, value) |
| 179 | + } |
| 180 | + } |
| 181 | + } |
| 182 | + } |
| 183 | + } |
| 184 | + |
| 185 | + description := "" |
| 186 | + for _, id := range rightSizedIds { |
| 187 | + description += fmt.Sprintf("Changing instance class of %s to %s\n", id, recommendation[id]) |
| 188 | + description += rightSizingDescription[id] + "\n\n" |
| 189 | + } |
| 190 | + |
| 191 | + if countRightSized == 0 { |
| 192 | + return nil |
| 193 | + } |
| 194 | + return github.ApplyChanges( |
| 195 | + utils.ReadStringFlag(cmd, "github-owner"), |
| 196 | + utils.ReadStringFlag(cmd, "github-repo"), |
| 197 | + utils.ReadStringFlag(cmd, "github-username"), |
| 198 | + utils.ReadStringFlag(cmd, "github-token"), |
| 199 | + utils.ReadStringFlag(cmd, "github-base-branch"), |
| 200 | + fmt.Sprintf("SRE Bot right sizing %d resources", countRightSized), |
| 201 | + utils.ReadStringFlag(cmd, "terraform-file-path"), |
| 202 | + string(file.Bytes()), |
| 203 | + fmt.Sprintf("SRE Bot right sizing %d resources", countRightSized), |
| 204 | + description, |
| 205 | + ) |
| 206 | + }, |
| 207 | +} |
| 208 | + |
| 209 | +func resolveValue(vars map[string]string, value string) string { |
| 210 | + varRegEx, err := regexp.Compile("local\\.(\\w+)") |
| 211 | + if err != nil { |
| 212 | + panic(err) |
| 213 | + } |
| 214 | + |
| 215 | + if strings.HasPrefix(value, "\"") && strings.HasSuffix(value, "\"") { |
| 216 | + value = strings.TrimPrefix(value, "\"") |
| 217 | + value = strings.TrimSuffix(value, "\"") |
| 218 | + |
| 219 | + exprRegEx, err := regexp.Compile("\\$\\{([\\w.]+)}") |
| 220 | + if err != nil { |
| 221 | + panic(err) |
| 222 | + } |
| 223 | + |
| 224 | + items := exprRegEx.FindAllString(value, 100) |
| 225 | + for _, item := range items { |
| 226 | + resolvedItem := resolveValue(vars, item) |
| 227 | + value = strings.ReplaceAll(value, item, resolvedItem) |
| 228 | + } |
| 229 | + return value |
| 230 | + } else { |
| 231 | + if varRegEx.MatchString(value) { |
| 232 | + subMatch := varRegEx.FindStringSubmatch(value) |
| 233 | + value = vars[subMatch[1]] |
| 234 | + return resolveValue(vars, value) |
| 235 | + } else { |
| 236 | + return value |
| 237 | + } |
| 238 | + } |
| 239 | +} |
0 commit comments