抑制 gcloud 命令生成的额外 o/p

Question

我正在使用 gcloud 命令来部署简单的虚拟机。我正在使用启动脚本在机器上配置所有必需的包。我们的包是从 nexus 中获取的。有时我们的更改或 nexus 网络问题会导致启动脚本失败。我配置了一段代码来验证启动脚本 return 代码。我运行 gcloud create 命令并提供启动脚本，验证启动脚本输出的代码块如下所示..

echo "Step 2: sleep till startup script finishes"
## block to check return code of the VM startup script
MAX_WAIT_TIME=1200
WAIT_TIME=0
RC_CODE=""
echo "[INFO] waiting for startup-script return code"
while [ -z $RC_CODE ] && [ $WAIT_TIME -le $MAX_WAIT_TIME ]
do
  RC_CODE=$(gcloud compute instances get-serial-port-output gce-$GCP_ZONE-d-$APP-dev \
  --project=$GCP_PROJECT_ID \
  --zone=$GCP_ZONE | awk '/^[0-9]{4}/ && /google_metadata_script_runner/ && /startup-script-url exit status/ {sub("\r", "", $NF); print $NF}')
  if [[ -z $RC_CODE ]] ; then
    echo -n "."
    WAIT_TIME=$((WAIT_TIME+10))
    sleep 10
  else
    if [[ $RC_CODE -eq 0 ]] ; then
      echo -e "\n[INFO] startup script completed with return code $RC_CODE."
      break
    else
      echo -e "\n[INFO] Startup script completed with return code $RC_CODE."
      exit $RC_CODE
    fi
  fi
done

# to check timeout scenario
if [[ -z $RC_CODE ]]
then
  echo "[INFO] Startup script timed out after $((MAX_WAIT_TIME/60))."
  echo "[INFO] Startup script completed with return code 1."
  exit 1
fi

我的输出是这样的，

+ ./sh/create-dev-vm-app.sh
Deleted [https://www.googleapis.com/compute/v1/projects/project-name/zones/europe-west1-c/instances/gce-europe-west1-c-d-myapp-dev].
Created [https://www.googleapis.com/compute/v1/projects/project-name/zones/europe-west1-c/instances/gce-europe-west1-c-d-myapp-dev].

waiting for startup-script return code
Specify --start=2473 in the next get-serial-port-output invocation to get only the new output starting from here.
.
Specify --start=32157 in the next get-serial-port-output invocation to get only the new output starting from here.
.
Specify --start=37602 in the next get-serial-port-output invocation to get only the new output starting from here.```
.
Startup script completed with return code 0.

如何抑制这些 'Specify' 行出现在 o/p 屏幕上？ AND/OR 在我收到 return 代码后打印从 get-serial-port-output 输出接收到的所有启动脚本消息。

Answer 1

吞下标准错误以避免多余的输出：

gcloud ... 2>/dev/null | awk ...

抑制 gcloud 命令生成的额外 o/p

suppress extra o/p generated by gcloud command

bash

google-cloud-platform

gcloud