diff --git a/garden-service/package-lock.json b/garden-service/package-lock.json
index decbcd4af8..ba6cc4bab5 100644
--- a/garden-service/package-lock.json
+++ b/garden-service/package-lock.json
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-        "expand-template": "^1.0.2",
-        "github-from-package": "0.0.0",
-        "minimist": "^1.2.0",
-        "mkdirp": "^0.5.1",
-        "node-abi": "^2.2.0",
-        "noop-logger": "^0.1.1",
-        "npmlog": "^4.0.1",
-        "os-homedir": "^1.0.1",
-        "pump": "^2.0.1",
-        "rc": "^1.2.7",
-        "simple-get": "^2.7.0",
-        "tar-fs": "^1.13.0",
-        "tunnel-agent": "^0.6.0",
-        "which-pm-runs": "^1.0.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
-        },
-        "pump": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/pump/-/pump-2.0.1.tgz",
-          "integrity": "sha512-ruPMNRkN3MHP1cWJc9OWr+T/xDP0jhXYCLfJcBuX54hhfIBnaQmAUMfDcG4DM5UMWByBbJY69QSphm3jtDKIkA==",
-          "requires": {
-            "end-of-stream": "^1.1.0",
-            "once": "^1.3.1"
-          }
-        },
-        "tar-fs": {
-          "version": "1.16.3",
-          "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-1.16.3.tgz",
-          "integrity": "sha512-NvCeXpYx7OsmOh8zIOP/ebG55zZmxLE0etfWRbWok+q2Qo8x/vOR/IJT1taADXPe+jsiu9axDb3X4B+iIgNlKw==",
-          "requires": {
-            "chownr": "^1.0.1",
-            "mkdirp": "^0.5.1",
-            "pump": "^1.0.0",
-            "tar-stream": "^1.1.2"
-          },
-          "dependencies": {
-            "pump": {
-              "version": "1.0.3",
-              "resolved": "https://registry.npmjs.org/pump/-/pump-1.0.3.tgz",
-              "integrity": "sha512-8k0JupWme55+9tCVE+FS5ULT3K6AbgqrGa58lTT49RpyfwwcGedHqaC5LlQNdEAumn/wFsu6aPwkuPMioy8kqw==",
-              "requires": {
-                "end-of-stream": "^1.1.0",
-                "once": "^1.3.1"
-              }
-            }
-          }
-        }
-      }
-    },
     "prelude-ls": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
@@ -9676,24 +9466,6 @@
         }
       }
     },
-    "rc": {
-      "version": "1.2.8",
-      "resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
-      "integrity": "sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==",
-      "requires": {
-        "deep-extend": "^0.6.0",
-        "ini": "~1.3.0",
-        "minimist": "^1.2.0",
-        "strip-json-comments": "~2.0.1"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
-        }
-      }
-    },
     "read-pkg": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-3.0.0.tgz",
@@ -10174,21 +9946,6 @@
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
     },
-    "simple-concat": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.0.tgz",
-      "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY="
-    },
-    "simple-get": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.8.1.tgz",
-      "integrity": "sha512-lSSHRSw3mQNUGPAYRqo7xy9dhKmxFXIjLjp4KHpf99GEH2VH7C3AM+Qfx6du6jhfUi6Vm7XnbEVEf7Wb6N8jRw==",
-      "requires": {
-        "decompress-response": "^3.3.0",
-        "once": "^1.3.1",
-        "simple-concat": "^1.0.0"
-      }
-    },
     "simple-swizzle": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.2.tgz",
@@ -10842,9 +10599,9 @@
       "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw="
     },
     "sshpk": {
-      "version": "1.14.2",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.14.2.tgz",
-      "integrity": "sha1-xvxhZIo9nE52T9P8306hBeSSupg=",
+      "version": "1.15.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.1.tgz",
+      "integrity": "sha512-mSdgNUaidk+dRU5MhYtN9zebdzF2iG0cNPWy8HG+W8y+fT1JnSkh0fzzpjOa0L7P8i1Rscz38t0h4gPcKz43xA==",
       "requires": {
         "asn1": "~0.2.3",
         "assert-plus": "^1.0.0",
@@ -10863,32 +10620,40 @@
       "integrity": "sha1-VHxws0fo0ytOEI6hoqFZ5f3eGcA="
     },
     "static-eval": {
-      "version": "0.2.3",
-      "resolved": "https://registry.npmjs.org/static-eval/-/static-eval-0.2.3.tgz",
-      "integrity": "sha1-Aj8XrJ/uQm6niMEuo5IG3Bdfiyo=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/static-eval/-/static-eval-2.0.0.tgz",
+      "integrity": "sha512-6flshd3F1Gwm+Ksxq463LtFd1liC77N/PX1FVVc3OzL3hAmo2fwHFbuArkcfi7s9rTNsLEhcRmXGFZhlgy40uw==",
       "requires": {
-        "escodegen": "~0.0.24"
+        "escodegen": "^1.8.1"
       },
       "dependencies": {
         "escodegen": {
-          "version": "0.0.28",
-          "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-0.0.28.tgz",
-          "integrity": "sha1-Dk/xcV8yh3XWyrUaxEpAbNer/9M=",
+          "version": "1.11.0",
+          "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-1.11.0.tgz",
+          "integrity": "sha512-IeMV45ReixHS53K/OmfKAIztN/igDHzTJUhZM3k1jMhIZWjk45SMwAtBsEXiJp3vSPmTcu6CXn7mDvFHRN66fw==",
           "requires": {
-            "esprima": "~1.0.2",
-            "estraverse": "~1.3.0",
-            "source-map": ">= 0.1.2"
+            "esprima": "^3.1.3",
+            "estraverse": "^4.2.0",
+            "esutils": "^2.0.2",
+            "optionator": "^0.8.1",
+            "source-map": "~0.6.1"
           }
         },
         "esprima": {
-          "version": "1.0.4",
-          "resolved": "https://registry.npmjs.org/esprima/-/esprima-1.0.4.tgz",
-          "integrity": "sha1-n1V+CPw7TSbs6d00+Pv0drYlha0="
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/esprima/-/esprima-3.1.3.tgz",
+          "integrity": "sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM="
         },
         "estraverse": {
-          "version": "1.3.2",
-          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-1.3.2.tgz",
-          "integrity": "sha1-N8K4k+8T1yPydth41g2FNRUqbEI="
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.2.0.tgz",
+          "integrity": "sha1-De4/7TH81GlhjOc0IJn8GvoL2xM="
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "optional": true
         }
       }
     },
@@ -10986,11 +10751,6 @@
       "integrity": "sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g=",
       "dev": true
     },
-    "strip-json-comments": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
-      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
-    },
     "supports-color": {
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
@@ -11443,8 +11203,7 @@
     "tweetnacl": {
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "optional": true
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
     },
     "type-check": {
       "version": "0.3.2",
@@ -11880,14 +11639,21 @@
       }
     },
     "websocket": {
-      "version": "1.0.26",
-      "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.26.tgz",
-      "integrity": "sha512-fjcrYDPIQxpTnqFQ9JjxUQcdvR89MFAOjPBlF+vjOt49w/XW4fJknUoMz/mDIn2eK1AdslVojcaOxOqyZZV8rw==",
+      "version": "1.0.28",
+      "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.28.tgz",
+      "integrity": "sha512-00y/20/80P7H4bCYkzuuvvfDvh+dgtXi5kzDf3UcZwN6boTYaKvsrtZ5lIYm1Gsg48siMErd9M4zjSYfYFHTrA==",
       "requires": {
         "debug": "^2.2.0",
-        "nan": "^2.3.3",
-        "typedarray-to-buffer": "^3.1.2",
+        "nan": "^2.11.0",
+        "typedarray-to-buffer": "^3.1.5",
         "yaeti": "^0.0.6"
+      },
+      "dependencies": {
+        "nan": {
+          "version": "2.11.1",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.11.1.tgz",
+          "integrity": "sha512-iji6k87OSXa0CcrLl9z+ZiYSuR2o+c0bGuNmXdrhTQTakxytAFsC56SArGYoiHlJlFoHSnvmhpceZJaXkVuOtA=="
+        }
       }
     },
     "which": {
@@ -11903,19 +11669,6 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
-    "which-pm-runs": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/which-pm-runs/-/which-pm-runs-1.0.0.tgz",
-      "integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs="
-    },
-    "wide-align": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
-      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
-      "requires": {
-        "string-width": "^1.0.2 || 2"
-      }
-    },
     "win-release": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/win-release/-/win-release-1.1.1.tgz",
diff --git a/garden-service/package.json b/garden-service/package.json
index 6033cb87db..8659fa03ea 100644
--- a/garden-service/package.json
+++ b/garden-service/package.json
@@ -58,7 +58,6 @@
     "log-symbols": "^2.2.0",
     "moment": "^2.22.2",
     "node-emoji": "^1.8.1",
-    "node-pty-prebuilt": "^0.7.6",
     "normalize-url": "^3.2.0",
     "p-queue": "^3.0.0",
     "path-is-inside": "^1.0.2",
diff --git a/garden-service/src/commands/exec.ts b/garden-service/src/commands/exec.ts
index 8271a53228..801be5e119 100644
--- a/garden-service/src/commands/exec.ts
+++ b/garden-service/src/commands/exec.ts
@@ -68,7 +68,7 @@ export class ExecCommand extends Command<Args> {
     })
 
     const service = await garden.getService(serviceName)
-    const result = await garden.actions.execInService({ service, command })
+    const result = await garden.actions.execInService({ service, command, interactive: true })
 
     return { result }
   }
diff --git a/garden-service/src/commands/run/module.ts b/garden-service/src/commands/run/module.ts
index a08ebd03af..ddb761d501 100644
--- a/garden-service/src/commands/run/module.ts
+++ b/garden-service/src/commands/run/module.ts
@@ -102,7 +102,6 @@ export class RunModuleCommand extends Command<Args, Opts> {
       module,
       command,
       runtimeContext,
-      silent: false,
       interactive: opts.interactive,
     })
 
diff --git a/garden-service/src/commands/run/service.ts b/garden-service/src/commands/run/service.ts
index e09eaf11b7..8612752a14 100644
--- a/garden-service/src/commands/run/service.ts
+++ b/garden-service/src/commands/run/service.ts
@@ -71,7 +71,7 @@ export class RunServiceCommand extends Command<Args, Opts> {
 
     printRuntimeContext(garden, runtimeContext)
 
-    const result = await garden.actions.runService({ service, runtimeContext, silent: false, interactive: true })
+    const result = await garden.actions.runService({ service, runtimeContext, interactive: true })
 
     return { result }
   }
diff --git a/garden-service/src/plugins/google/common.ts b/garden-service/src/plugins/google/common.ts
index df63ace505..76775eb791 100644
--- a/garden-service/src/plugins/google/common.ts
+++ b/garden-service/src/plugins/google/common.ts
@@ -84,7 +84,7 @@ export async function prepareEnvironment({ status, logEntry }: PrepareEnvironmen
       section: "google-cloud-functions",
       msg: `Initializing SDK...`,
     })
-    await gcloud().tty(["init"], { silent: false })
+    await gcloud().call(["init"], { timeout: 600, tty: true })
   }
 
   return {}
diff --git a/garden-service/src/plugins/google/gcloud.ts b/garden-service/src/plugins/google/gcloud.ts
index 4aac80133c..345d6e75ee 100644
--- a/garden-service/src/plugins/google/gcloud.ts
+++ b/garden-service/src/plugins/google/gcloud.ts
@@ -6,9 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-import * as spawn from "cross-spawn"
-import { extend } from "lodash"
-import { spawnPty } from "../../util/util"
+import { spawn, SpawnOpts } from "../../util/util"
 
 export interface GCloudParams {
   data?: Buffer,
@@ -37,67 +35,10 @@ export class GCloud {
     this.project = project
   }
 
-  async call(
-    args: string[],
-    { data, ignoreError = false, silent = true, timeout = DEFAULT_TIMEOUT, cwd }: GCloudParams = {},
-  ): Promise<GCloudOutput> {
-
-    const out: GCloudOutput = {
-      code: 0,
-      output: "",
-      stdout: "",
-      stderr: "",
-    }
-
-    const proc = spawn("gcloud", this.prepareArgs(args), { cwd })
-
-    proc.stdout.on("data", (s) => {
-      if (!silent) {
-        process.stdout.write(s)
-      }
-      out.output += s
-      out.stdout! += s
-    })
-
-    proc.stderr.on("data", (s) => {
-      if (!silent) {
-        process.stderr.write(s)
-      }
-      out.output += s
-      out.stderr! += s
-    })
-
-    if (data) {
-      proc.stdin.end(data)
-    }
-
-    return new Promise<GCloudOutput>((resolve, reject) => {
-      let _timeout
-
-      const _reject = (msg: string) => {
-        const err = new Error(msg)
-        extend(err, <any>out)
-        reject(err)
-      }
-
-      if (timeout > 0) {
-        _timeout = setTimeout(() => {
-          proc.kill("SIGKILL")
-          _reject(`gcloud timed out after ${timeout} seconds.`)
-        }, timeout * 1000)
-      }
-
-      proc.on("close", (code) => {
-        _timeout && clearTimeout(_timeout)
-        out.code = code
-
-        if (code === 0 || ignoreError) {
-          resolve(out)
-        } else {
-          _reject("Process exited with code " + code)
-        }
-      })
-    })
+  async call(args: string[], opts: SpawnOpts = {}): Promise<GCloudOutput> {
+    const { data, ignoreError = false, timeout = DEFAULT_TIMEOUT } = opts
+    const preparedArgs = this.prepareArgs(args)
+    return spawn("gcloud", preparedArgs, { ignoreError, data, timeout })
   }
 
   async json(args: string[], opts: GCloudParams = {}): Promise<any> {
@@ -110,10 +51,6 @@ export class GCloud {
     return JSON.parse(result.output)
   }
 
-  async tty(args: string[], { silent = true, cwd }: { silent?: boolean, cwd?: string } = {}): Promise<GCloudOutput> {
-    return spawnPty("gcloud", this.prepareArgs(args), { silent, cwd, tty: true })
-  }
-
   private prepareArgs(args: string[]) {
     const ops: string[] = []
 
diff --git a/garden-service/src/plugins/kubernetes/actions.ts b/garden-service/src/plugins/kubernetes/actions.ts
index ed28a3cd81..b3e29e605e 100644
--- a/garden-service/src/plugins/kubernetes/actions.ts
+++ b/garden-service/src/plugins/kubernetes/actions.ts
@@ -90,7 +90,7 @@ export async function getServiceOutputs({ service }: GetServiceOutputsParams<Con
 }
 
 export async function execInService(params: ExecInServiceParams<ContainerModule>) {
-  const { ctx, service, command } = params
+  const { ctx, service, command, interactive } = params
   const api = new KubeApi(ctx.provider)
   const status = await getContainerServiceStatus(params)
   const namespace = await getAppNamespace(ctx, ctx.provider)
@@ -123,12 +123,11 @@ export async function execInService(params: ExecInServiceParams<ContainerModule>
   }
 
   // exec in the pod via kubectl
-  const kubecmd = ["exec", "-it", pod.metadata.name, "--", ...command]
-  const res = await kubectl(api.context, namespace).tty(kubecmd, {
+  const kubecmd = ["exec", "-i", pod.metadata.name, "--", ...command]
+  const res = await kubectl(api.context, namespace).call(kubecmd, {
     ignoreError: true,
-    silent: false,
     timeout: 999999,
-    tty: true,
+    tty: interactive,
   })
 
   return { code: res.code, output: res.output }
@@ -170,7 +169,7 @@ export async function hotReload(
 }
 
 export async function runModule(
-  { ctx, module, command, interactive, runtimeContext, silent, timeout }: RunModuleParams<ContainerModule>,
+  { ctx, module, command, interactive, runtimeContext, timeout }: RunModuleParams<ContainerModule>,
 ): Promise<RunResult> {
   const context = ctx.provider.config.context
   const namespace = await getAppNamespace(ctx, ctx.provider)
@@ -185,7 +184,6 @@ export async function runModule(
     `--image=${image}`,
     "--restart=Never",
     "--command",
-    "--tty",
     "--rm",
     "-i",
     "--quiet",
@@ -203,9 +201,8 @@ export async function runModule(
 
   const startedAt = new Date()
 
-  const res = await kubectl(context, namespace).tty(kubecmd, {
+  const res = await kubectl(context, namespace).call(kubecmd, {
     ignoreError: true,
-    silent: !interactive || silent, // shouldn't be silent in interactive mode
     timeout,
     tty: interactive,
   })
@@ -222,7 +219,7 @@ export async function runModule(
 }
 
 export async function runService(
-  { ctx, service, interactive, runtimeContext, silent, timeout, logEntry, buildDependencies }:
+  { ctx, service, interactive, runtimeContext, timeout, logEntry, buildDependencies }:
     RunServiceParams<ContainerModule>,
 ) {
   return runModule({
@@ -231,7 +228,6 @@ export async function runService(
     command: service.spec.command || [],
     interactive,
     runtimeContext,
-    silent,
     timeout,
     logEntry,
     buildDependencies,
@@ -239,7 +235,7 @@ export async function runService(
 }
 
 export async function testModule(
-  { ctx, interactive, module, runtimeContext, silent, testConfig, logEntry, buildDependencies }:
+  { ctx, interactive, module, runtimeContext, testConfig, logEntry, buildDependencies }:
     TestModuleParams<ContainerModule>,
 ): Promise<TestResult> {
   const testName = testConfig.name
@@ -253,7 +249,6 @@ export async function testModule(
     command,
     interactive,
     runtimeContext,
-    silent,
     timeout,
     logEntry,
     buildDependencies,
diff --git a/garden-service/src/plugins/kubernetes/kubectl.ts b/garden-service/src/plugins/kubernetes/kubectl.ts
index ae322055be..76d47bc167 100644
--- a/garden-service/src/plugins/kubernetes/kubectl.ts
+++ b/garden-service/src/plugins/kubernetes/kubectl.ts
@@ -6,30 +6,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-import chalk from "chalk"
 import { ChildProcess } from "child_process"
-import * as spawn from "cross-spawn"
-import { extend } from "lodash"
-import { encodeYamlMulti, spawnPty } from "../../util/util"
-import { RuntimeError } from "../../exceptions"
-import { getLogger } from "../../logger/logger"
-import { platform } from "os"
-import hasAnsi = require("has-ansi")
-
-export interface KubectlParams {
-  data?: Buffer,
-  ignoreError?: boolean,
-  silent?: boolean,
-  timeout?: number,
-  tty?: boolean,
-}
-
-export interface KubectlOutput {
-  code: number,
-  output: string,
-  stdout?: string,
-  stderr?: string,
-}
+import * as _spawn from "cross-spawn"
+import { encodeYamlMulti, spawn, SpawnOpts } from "../../util/util"
 
 export interface ApplyOptions {
   dryRun?: boolean,
@@ -52,79 +31,13 @@ export class Kubectl {
     this.configPath = configPath
   }
 
-  async call(
-    args: string[],
-    { data, ignoreError = false, silent = true, timeout = KUBECTL_DEFAULT_TIMEOUT }: KubectlParams = {},
-  ): Promise<KubectlOutput> {
-    // TODO: use the spawn helper from index.ts
-    const logger = getLogger()
-    const out: KubectlOutput = {
-      code: 0,
-      output: "",
-      stdout: "",
-      stderr: "",
-    }
-
-    const preparedArgs = this.prepareArgs(args)
-    const proc = spawn(this.getExececutable(), preparedArgs)
-
-    proc.stdout.on("data", (s) => {
-      if (!silent) {
-        const str = s.toString()
-        logger.info(hasAnsi(str) ? str : chalk.white(str))
-      }
-      out.output += s
-      out.stdout! += s
-    })
-
-    proc.stderr.on("data", (s) => {
-      if (!silent) {
-        const str = s.toString()
-        logger.info(hasAnsi(str) ? str : chalk.white(str))
-      }
-      out.output += s
-      out.stderr! += s
-    })
-
-    if (data) {
-      proc.stdin.end(data)
-    }
-
-    return new Promise<KubectlOutput>((resolve, reject) => {
-      let _timeout
-
-      const _reject = (msg: string) => {
-        const dataStr = data ? data.toString() : null
-        const details = extend({ args, preparedArgs, msg, data: dataStr }, <any>out)
-
-        const err = new RuntimeError(
-          `Failed running 'kubectl ${preparedArgs.join(" ")}': ${out.output}`,
-          details,
-        )
-        reject(err)
-      }
-
-      if (timeout > 0) {
-        _timeout = setTimeout(() => {
-          proc.kill("SIGKILL")
-          _reject(`kubectl timed out after ${timeout} seconds.`)
-        }, timeout * 1000)
-      }
-
-      proc.on("close", (code) => {
-        _timeout && clearTimeout(_timeout)
-        out.code = code
-
-        if (code === 0 || ignoreError) {
-          resolve(out)
-        } else {
-          _reject("Process exited with code " + code)
-        }
-      })
-    })
+  async call(args: string[], opts: SpawnOpts = {}) {
+    const { data, ignoreError = false, timeout = KUBECTL_DEFAULT_TIMEOUT } = opts
+    const preparedArgs = this.prepareArgs(args, opts)
+    return spawn("kubectl", preparedArgs, { ignoreError, data, timeout })
   }
 
-  async json(args: string[], opts: KubectlParams = {}): Promise<KubectlOutput> {
+  async json(args: string[], opts: SpawnOpts = {}): Promise<any> {
     if (!args.includes("--output=json")) {
       args.push("--output=json")
     }
@@ -134,20 +47,11 @@ export class Kubectl {
     return JSON.parse(result.output)
   }
 
-  async tty(args: string[], opts: KubectlParams = {}): Promise<KubectlOutput> {
-    return spawnPty(this.getExececutable(), this.prepareArgs(args), opts)
-  }
-
   spawn(args: string[]): ChildProcess {
-    return spawn(this.getExececutable(), this.prepareArgs(args))
-  }
-
-  private getExececutable() {
-    // workaround for https://github.com/Microsoft/node-pty/issues/109
-    return platform() === "win32" ? "kubectl.exe" : "kubectl"
+    return _spawn("kubectl", this.prepareArgs(args, {}))
   }
 
-  private prepareArgs(args: string[]) {
+  private prepareArgs(args: string[], { tty }: SpawnOpts) {
     const ops: string[] = []
 
     if (this.namespace) {
@@ -162,6 +66,10 @@ export class Kubectl {
       ops.push(`--kubeconfig=${this.configPath}`)
     }
 
+    if (tty) {
+      ops.push("--tty")
+    }
+
     return ops.concat(args)
   }
 }
diff --git a/garden-service/src/types/plugin/params.ts b/garden-service/src/types/plugin/params.ts
index d5711c30e6..9b1f8c3053 100644
--- a/garden-service/src/types/plugin/params.ts
+++ b/garden-service/src/types/plugin/params.ts
@@ -157,7 +157,6 @@ export interface RunModuleParams<T extends Module = Module> extends PluginModule
   command: string[]
   interactive: boolean
   runtimeContext: RuntimeContext
-  silent: boolean
   timeout?: number
 }
 const runBaseParams = {
@@ -242,12 +241,14 @@ export const getServiceOutputsParamsSchema = serviceActionParamsSchema
 export interface ExecInServiceParams<T extends Module = Module> extends PluginServiceActionParamsBase<T> {
   command: string[]
   runtimeContext: RuntimeContext
+  interactive: boolean
 }
 export const execInServiceParamsSchema = serviceActionParamsSchema
   .keys({
     command: joiArray(Joi.string())
       .description("The command to run alongside the service."),
     runtimeContext: runtimeContextSchema,
+    interactive: Joi.boolean(),
   })
 
 export interface GetServiceLogsParams<T extends Module = Module> extends PluginServiceActionParamsBase<T> {
@@ -271,7 +272,6 @@ export const getServiceLogsParamsSchema = serviceActionParamsSchema
 export interface RunServiceParams<T extends Module = Module> extends PluginServiceActionParamsBase<T> {
   interactive: boolean
   runtimeContext: RuntimeContext
-  silent: boolean
   timeout?: number
 }
 export const runServiceParamsSchema = serviceActionParamsSchema
diff --git a/garden-service/src/util/util.ts b/garden-service/src/util/util.ts
index f098152e82..803a7dabb3 100644
--- a/garden-service/src/util/util.ts
+++ b/garden-service/src/util/util.ts
@@ -8,7 +8,6 @@
 
 import Bluebird = require("bluebird")
 import { ResolvableProps } from "bluebird"
-const pty = require("node-pty-prebuilt")
 import * as exitHook from "async-exit-hook"
 import * as klaw from "klaw"
 import * as yaml from "js-yaml"
@@ -17,12 +16,10 @@ import * as _spawn from "cross-spawn"
 import { pathExists, readFile, writeFile } from "fs-extra"
 import { join, basename, win32, posix } from "path"
 import { find, pick, difference, fromPairs } from "lodash"
-import { TimeoutError, ParameterError } from "../exceptions"
-import { PassThrough } from "stream"
+import { TimeoutError, ParameterError, RuntimeError, GardenError } from "../exceptions"
 import { isArray, isPlainObject, extend, mapValues, pickBy } from "lodash"
 import highlight from "cli-highlight"
 import chalk from "chalk"
-import hasAnsi = require("has-ansi")
 import { safeDump } from "js-yaml"
 import { GARDEN_DIR_NAME } from "../constants"
 import { createHash } from "crypto"
@@ -139,18 +136,13 @@ export async function sleep(msec) {
   return new Promise(resolve => setTimeout(resolve, msec))
 }
 
-export interface SpawnParams {
+export interface SpawnOpts {
   timeout?: number
   cwd?: string
   data?: Buffer
   ignoreError?: boolean
   env?: { [key: string]: string | undefined }
-}
-
-export interface SpawnPtyParams extends SpawnParams {
-  silent?: boolean
   tty?: boolean
-  bufferOutput?: boolean
 }
 
 export interface SpawnOutput {
@@ -161,11 +153,11 @@ export interface SpawnOutput {
   proc: any
 }
 
-export function spawn(
-  cmd: string, args: string[],
-  { timeout = 0, cwd, data, ignoreError = false, env }: SpawnParams = {},
-) {
-  const proc = _spawn(cmd, args, { cwd, env })
+export function spawn(cmd: string, args: string[], opts: SpawnOpts = {}) {
+  const { timeout = 0, cwd, data, ignoreError = false, env, tty } = opts
+
+  const stdio = tty ? "inherit" : "pipe"
+  const proc = _spawn(cmd, args, { cwd, env, stdio })
 
   const result: SpawnOutput = {
     code: 0,
@@ -175,130 +167,57 @@ export function spawn(
     proc,
   }
 
-  proc.stdout.on("data", (s) => {
-    result.output += s
-    result.stdout! += s
-  })
-
-  proc.stderr.on("data", (s) => {
-    result.output += s
-    result.stderr! += s
-  })
-
-  if (data) {
-    proc.stdin.end(data)
-  }
-
-  return new Promise<SpawnOutput>((resolve, reject) => {
-    let _timeout
+  let _process = <any>process
 
-    const _reject = (msg: string) => {
-      const err = new Error(msg)
-      extend(err, <any>result)
-      reject(err)
+  if (tty) {
+    if (data) {
+      throw new ParameterError(`Cannot pipe to stdin when tty=true`, { cmd, args, opts })
     }
 
-    if (timeout > 0) {
-      _timeout = setTimeout(() => {
-        proc.kill("SIGKILL")
-        _reject(`kubectl timed out after ${timeout} seconds.`)
-      }, timeout * 1000)
-    }
+    _process.stdin.setEncoding("utf8")
 
-    proc.on("close", (code) => {
-      _timeout && clearTimeout(_timeout)
-      result.code = code
+    // raw mode is not available if we're running without a TTY
+    _process.stdin.setRawMode && _process.stdin.setRawMode(true)
 
-      if (code === 0 || ignoreError) {
-        resolve(result)
-      } else {
-        _reject("Process exited with code " + code)
-      }
+  } else {
+    proc.stdout.on("data", (s) => {
+      result.output += s
+      result.stdout! += s
     })
-  })
-}
-
-export function spawnPty(
-  cmd: string, args: string[],
-  {
-    silent = false, tty = false, timeout = 0, cwd,
-    bufferOutput = true, data, ignoreError = false,
-  }: SpawnPtyParams = {},
-): Bluebird<any> {
-  let _process = <any>process
-
-  let proc: any = pty.spawn(cmd, args, {
-    cwd,
-    name: "xterm-color",
-    cols: _process.stdout.columns,
-    rows: _process.stdout.rows,
-  })
-
-  _process.stdin.setEncoding("utf8")
-
-  // raw mode is not available if we're running without a TTY
-  tty && _process.stdin.setRawMode && _process.stdin.setRawMode(true)
-
-  const result: SpawnOutput = {
-    code: 0,
-    output: "",
-    proc,
-  }
-
-  proc.on("data", (output) => {
-    const str = output.toString()
 
-    if (bufferOutput) {
-      result.output += str
-    }
+    proc.stderr.on("data", (s) => {
+      result.output += s
+      result.stderr! += s
+    })
 
-    if (!silent) {
-      process.stdout.write(hasAnsi(str) ? str : chalk.white(str))
+    if (data) {
+      proc.stdin.end(data)
     }
-  })
-
-  if (data) {
-    const bufferStream = new PassThrough()
-    bufferStream.end(data + "\n\0")
-    bufferStream.pipe(proc)
-    proc.end()
   }
 
-  if (tty) {
-    process.stdin.pipe(proc)
-  }
-
-  return new Bluebird((resolve, _reject) => {
+  return new Promise<SpawnOutput>((resolve, reject) => {
     let _timeout
 
-    const reject = (err: any) => {
-      err.output = result.output
-      err.proc = result.proc
-      console.log(err.output)
-      _reject(err)
+    const _reject = (err: GardenError) => {
+      extend(err.detail, <any>result)
+      reject(err)
     }
 
     if (timeout > 0) {
       _timeout = setTimeout(() => {
         proc.kill("SIGKILL")
-        const err = new TimeoutError(`${cmd} command timed out after ${timeout} seconds.`, { cmd, timeout })
-        reject(err)
+        _reject(new TimeoutError(`${cmd} timed out after ${timeout} seconds.`, { cmd, args, opts }))
       }, timeout * 1000)
     }
 
-    proc.on("exit", (code) => {
+    proc.on("close", (code) => {
       _timeout && clearTimeout(_timeout)
-
-      // make sure raw input is decoupled
-      tty && _process.stdin.setRawMode && _process.stdin.setRawMode(false)
       result.code = code
 
       if (code === 0 || ignoreError) {
         resolve(result)
       } else {
-        const err: any = new Error("Process exited with code " + code)
-        err.code = code
-        reject(err)
+        _reject(new RuntimeError(`${cmd} exited with code ${code}`, { cmd, args, opts }))
       }
     })
   })
diff --git a/garden-service/test/helpers.ts b/garden-service/test/helpers.ts
index 102b0ea0ba..1a6e08c7fe 100644
--- a/garden-service/test/helpers.ts
+++ b/garden-service/test/helpers.ts
@@ -139,7 +139,7 @@ export const testPlugin: PluginFactory = (): GardenPlugin => {
         runModule,
 
         async runService(
-          { ctx, service, interactive, runtimeContext, silent, timeout, buildDependencies }: RunServiceParams,
+          { ctx, service, interactive, runtimeContext, timeout, buildDependencies }: RunServiceParams,
         ) {
           return runModule({
             ctx,
@@ -147,7 +147,6 @@ export const testPlugin: PluginFactory = (): GardenPlugin => {
             command: [service.name],
             interactive,
             runtimeContext,
-            silent,
             timeout,
             buildDependencies,
           })
diff --git a/garden-service/test/src/actions.ts b/garden-service/test/src/actions.ts
index 02c854939c..469f5e8348 100644
--- a/garden-service/test/src/actions.ts
+++ b/garden-service/test/src/actions.ts
@@ -176,7 +176,6 @@ describe("ActionHelper", () => {
             envVars: { FOO: "bar" },
             dependencies: {},
           },
-          silent: false,
         })
         expect(result).to.eql({
           moduleName: module.name,
@@ -272,7 +271,7 @@ describe("ActionHelper", () => {
 
     describe("execInService", () => {
       it("should correctly call the corresponding plugin handler", async () => {
-        const result = await actions.execInService({ service, command: ["foo"] })
+        const result = await actions.execInService({ service, command: ["foo"], interactive: false })
         expect(result).to.eql({ code: 0, output: "bla bla" })
       })
     })
@@ -294,7 +293,6 @@ describe("ActionHelper", () => {
             envVars: { FOO: "bar" },
             dependencies: {},
           },
-          silent: false,
         })
         expect(result).to.eql({
           moduleName: service.module.name,