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python - gcp : after disk is *finished* mounting I cannot ssh to my instance

转载 作者:塔克拉玛干 更新时间:2023-11-03 00:36:51 24 4
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在 Google Cloud Platform (GCP) 中,磁盘完成安装后我无法通过 SSH 连接到我的实例。

详情:

在 Windows 7 PC 上通过 google cloud sdk shell cmd windows 我在 C:\> 运行以下命令:

python "C:\Users\user's name\path\to\py\create_instance_working.py" --name inst-test2 --zone us-central1-a direct-to
pic-1234 cc-test1

它运行 create_instance_working.py,如下所示:

import argparse
import os
import time

import googleapiclient.discovery
from six.moves import input


# [START list_instances]
def list_instances(compute, project, zone):
result = compute.instances().list(project=project, zone=zone).execute()
return result['items']
# [END list_instances]


# [START create_instance]
def create_instance(compute, project, zone, name, bucket):

image_response = compute.images().getFromFamily(
project='direct-topic-1234', family='theFam').execute()
source_disk_image = image_response['selfLink']

machine_type = "projects/direct-topic-1234/zones/us-central1-a/machineTypes/n1-standard-4"
startup_script = open(
os.path.join(
os.path.dirname(__file__), 'startup-script_working.sh'), 'r').read()


print(machine_type)

config = {
'name': name,
'machineType': machine_type,


'disks': [
{
'boot': True,
'autoDelete': True,
'initializeParams': {
'sourceImage': source_disk_image,
'diskSizeGb': '15',
}
}, {

"deviceName": "disk-2",
"index": 1,
"interface": "SCSI",
"kind": "compute#attachedDisk",
"mode": "READ_WRITE",
"source": "projects/direct-topic-1234/zones/us-central1-a/disks/disk-2",
"type": "PERSISTENT"
}
],

'networkInterfaces': [{
'network': 'global/networks/default',
'accessConfigs': [
{'type': 'ONE_TO_ONE_NAT', 'name': 'External NAT'}
]
}],


"serviceAccounts": [
{
"email": "123456789-compute@developer.gserviceaccount.com",
"scopes": [
"https://www.googleapis.com/auth/devstorage.read_only",
"https://www.googleapis.com/auth/logging.write",
"https://www.googleapis.com/auth/monitoring.write",
"https://www.googleapis.com/auth/servicecontrol",
"https://www.googleapis.com/auth/service.management.readonly",
"https://www.googleapis.com/auth/trace.append"
]
}
],



'metadata': {
'items': [{
'key': 'startup-script',
'value': startup_script
}, {
'key': 'bucket',
'value': bucket
}]
}
}

return compute.instances().insert(
project=project,
zone=zone,
body=config).execute()
# [END create_instance]


# [START delete_instance]
def delete_instance(compute, project, zone, name):
return compute.instances().delete(
project=project,
zone=zone,
instance=name).execute()
# [END delete_instance]


# [START wait_for_operation]
def wait_for_operation(compute, project, zone, operation):
print('Waiting for operation to finish...')
while True:
result = compute.zoneOperations().get(
project=project,
zone=zone,
operation=operation).execute()

if result['status'] == 'DONE':
print("done.")
if 'error' in result:
raise Exception(result['error'])
return result

time.sleep(1)
# [END wait_for_operation]


# [START run]
def main(project, bucket, zone, instance_name, wait=True):
compute = googleapiclient.discovery.build('compute', 'v1')

print('Creating instance.')

operation = create_instance(compute, project, zone, instance_name, bucket)
wait_for_operation(compute, project, zone, operation['name'])

instances = list_instances(compute, project, zone)

print('Instances in project %s and zone %s:' % (project, zone))
for instance in instances:
print(' - ' + instance['name'])

print("""
Instance created.
It will take a minute or two for the instance to complete work.
Check this URL: http://storage.googleapis.com/{}/output.png
Once the image is uploaded press enter to delete the instance.
""".format(bucket))

# if wait:
# input()
#
# print('Deleting instance.')
#
# operation = delete_instance(compute, project, zone, instance_name)
# wait_for_operation(compute, project, zone, operation['name'])

print('all done with instance.')

if __name__ == '__main__':

print('in here 3')
main('direct-topic-1234', 'cc-test1', 'us-central1-a', 'inst-test1')
print('in here 4')
# [END run]

它调用如下所示的启动脚本 (startup-script_working.sh):

sudo mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/sdb
sudo mount -o discard,defaults /dev/sdb /var
sudo chmod a+w /var
sudo cp /etc/fstab /etc/fstab.backup
echo UUID=`sudo blkid -s UUID -o value /dev/sdb` /var ext4 discard,defaults,nofail 0 2 | sudo tee -a /etc/fstab

两者均改编自:

https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/compute/api/create_instance.py

在 GCP 控制台中,当我看到实例绿灯时,我立即单击实例 ssh 按钮并成功连接到实例。但是,如果我继续打开与实例的新 ssh 连接,它们都会工作,直到我在 /var 上的挂载完成。通过在有效的 ssh 连接(通常是第一个连接)中查找它,我看到挂载已完成,方法是:df -h。我可以看到 /dev/sdb 197G 60M 197G 1%/var。在 mount 没有出现的失败尝试之前。但是在它出现之后,没有任何东西会连接到它。在控制台中尝试了 >_ 按钮(shell)执行 gcloud compute ssh [instance name]。尝试使用 [用户名]@[外部 IP] 的 putty。

我试过只等待 5 分钟以通过 ssh 连接到实例(届时挂载将完成),这也不起作用。

重要提示:如果我注释掉所有启动脚本行,我可以无限期地连接,没有 SSH问题。我试过创建一个新磁盘并附加它。

看来是磁盘挂载导致了 ssh 问题。

早期的 ssh 连接继续正常运行,即使我无法创建新连接。

当 ssh 连接失败时,我会在 ssh 窗口中看到:"连接失败

与 SSH 服务器通信时发生错误。检查服务器和网络配置。”

知道是什么原因造成的吗?

实例为linux发行版SUSE 12

我的安装说明来自这里:

https://cloud.google.com/compute/docs/disks/add-persistent-disk

如果有避免这种情况的好方法(请提供),但我真的很想知道我做错了什么。

我是 GCP、云、python、ssh 和 Linux 的新手。 (这个问题的一切都是新的!)

如果我注释掉启动脚本行,按照描述运行所有内容,ssh 到保险,手动运行启动脚本命令,我没有得到任何错误,但我仍然需要测试我是否在之后创建另一个 ssh 连接。我们这样做并报告。

最佳答案

安装在 /var 上,其中包含与 ssh 相关的数据(除其他外)使得系统可以访问 /var 看到空白磁盘。数据必须保存在别处(cp -ar),挂载到 var,然后将数据移回。

我之前的回答是错误的。

关于python - gcp : after disk is *finished* mounting I cannot ssh to my instance,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47948275/

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