通过cloudformation启动实例后未执行userData [英] userData are not getting executed after launching the instance by cloudformation
问题描述
我创建了一个AWS cloudformation，它创建了一个启动配置和一个自动扩展组.在启动配置中的用户数据中，我已经配置了文件系统安装目标，并安装了cloudwatch代理:
I created a AWS cloudformation, which creates a launch configuration and an autoscaling group. In the user Data in the launch Config I have configured the file system mount target, and I installed the cloudwatch agent:
代码已编辑
"LaunchConfig":{
"Type":"AWS::AutoScaling::LaunchConfiguration",
"Metadata" : {
"AWS::CloudFormation::Init" : {
"config" : {
"files" : {
"/etc/cwlogs.cfg": {
"content": { "Fn::Join" : ["", [
"[general]",
"state_file = /var/awslogs/state/agent-state",
"[/var/log/syslog]",
"file = /tmp/",
"log_group_name = ecs-dataloader",
"log_stream_name = ECS-loader",
"datetime_format = %b %d %H:%M:%S"
]]},
"mode": "000755",
"owner": "root",
"group": "root"
},
"/etc/ecs/ecs.config": {
"content": { "Fn::Join" : ["", [
"ECS_CLUSTER=", { "Ref" : "ClusterName" }
]]},
"mode": "000755",
"owner": "root",
"group": "root"
}
},
"commands": {
"Update": {
"command": "yum -y update"
},
"InstallNfs":{
"command": "yum -y install nfs-utils"
},
"CreatFolder": {
"command": "mkdir -p /efs-mount-point/"
},
"EditPerms": {
"command": "chown ec2-user:ec2-user /efs-mount-point/"
},
"MountPoint": {
"command": { "Fn::Join" : ["", [
"AZ=$(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone)\n",
"echo LABEL=cloudimg-rootfs / ext4 defaults,discard 0 0\n",
"$AZ.",{ "Fn::FindInMap" : [ "FileSystemMap", {"Ref" : "EnvParam"}, "FileSystemID"] },
".efs.",{ "Ref" : "AWS::Region" },".amazonaws.com:/ /efs-script-import-tmp nfs4 nfsvers=4.1 0 0 >> /etc/fstab"
]]}
},
"Mount": {
"command": "mount -a -t nfs4"
},
"CloudWatchAgent": {
"command": { "Fn::Join" : ["", [
"curl https://s3.amazonaws.com/aws-cloudwatch/downloads/latest/awslogs-agent-setup.py -O\n",
"python ./awslogs-agent-setup.py --region ",{"Ref" : "AWS::Region"},"\n",
"chmod +x ./awslogs-agent-setup.py ./awslogs-agent-setup.py -n -r",
{"Ref" : "AWS::Region"}," -c /etc/cwlogs.cfg"
]]}
}
},
"services" : {
"sysvinit" : {
"awslogs" : { "enabled" : "true", "ensureRunning" : "true" }
}
}
}
}
},
"Properties":{
"ImageId":{ "Fn::FindInMap":[ "AWSRegionToAMI", { "Ref":"AWS::Region" }, "AMIID" ] },
"SecurityGroups":[ { "Ref":"EcsSecurityGroup" } ],
"InstanceType": {"Ref":"InstanceType" },
"IamInstanceProfile":{ "Ref":"EC2InstanceProfile" },
"KeyName":{ "Fn::FindInMap" : [ "KeyPairMapping", {"Ref" : "EnvParam"}, "Key"] },
"UserData":{ "Fn::Base64" : {
"Fn::Join" : ["", [
"#!/bin/bash -xe\n",
"/opt/aws/bin/cfn-init -v ",
" --stack ", { "Ref": "AWS::StackName" },
" --resource LaunchConfig",
" --region ", { "Ref" : "AWS::Region" },"\n"
]]}
}
}
}
图像细节:"eu-west-1": { "AMIID":"ami-ba346ec9" },
运行模板后，资源已成功创建.因此，我通过SSH连接了由自动伸缩组创建的实例，以查看userData是否已正确运行和设置. 不幸的是，检查之后，这就是我在/etc/fstab文件中找到的内容:
After running the template, the resources got created successfuly. So I connected to my instance that got created by the autoscaling group via SSH to see if the userData was properly run and set. Unfortunately, After checking, this is what I found in the /etc/fstab file:
$ cat /etc/fstab
LABEL=cloudimg-rootfs / ext4 defaults,discard 0 0
$ cat /etc/ecs/ecs.config
cat: /etc/ecs/ecs.config: No such file or directory
实例未连接到file system，我尝试在cloudformation::init /etc/cwlogs.cfg中创建的文件也不存在(它是cloudwatch agent配置文件).谁能告诉我没有执行的用户数据有什么问题?
The instance is not connected to the file system, the file that I tried to create in the cloudformation::init /etc/cwlogs.cfg does not exist either (it's the cloudwatch agent config file) . Can any one tell me what is wrong in the user data that it didn't get executed?
我试图检查日志文件，但是:
I tried to check the log files but :
$ cat /var/log/cfn-init.log
cat: /var/log/cfn-init.log: No such file or directory
这是什么问题?
编辑
$ cat /var/log/cloud-init-ouput.log
...
Cloud-init v. 0.7.6 running 'modules:final' at Fri, 17 Feb 2017 11:43:42 +0000. Up 44.66 seconds.
+ yum install -y aws-cfn-bootstrap/opt/aws/bin/cfn-init -v --stack Mystack --resource LaunchConfig --region eu-west-1
Loading "priorities" plugin
Loading "update-motd" plugin
Config time: 0.009
Command line error: no such option: --stack
Feb 17 11:43:43 cloud-init[2814]: util.py[WARNING]: Failed running /var/lib/cloud/instance/scripts/part-001 [1]
Feb 17 11:43:43 cloud-init[2814]: cc_scripts_user.py[WARNING]: Failed to run module scripts-user (scripts in /var/lib/cloud/instance/scripts)
Feb 17 11:43:43 cloud-init[2814]: util.py[WARNING]: Running module scripts-user (<module 'cloudinit.config.cc_scripts_user' from '/usr/lib/python2.7/dist-packages/cloudinit/config/cc_scripts_user.pyc'>) failed
Cloud-init v. 0.7.6 finished at Fri, 17 Feb 2017 11:43:43 +0000. Datasource DataSourceEc2. Up 45.18 seconds
推荐答案
这是我解决问题的方法:我在调用元数据之前更新用户数据中的cloud-init，而不是在客户端中安装cloudwatch代理.元数据，我在userdata中做了.
Here is how I resolved the problem: I Update the cloud-init in the user data before calling the meta-data and instead of installing the cloudwatch agent in the metadata, I did in the userdata.
"UserData":{ "Fn::Base64" : {
"Fn::Join" : ["", [
"#!/bin/bash -xe\n",
"yum -y install aws-cfn-bootstrap\n",
"/opt/aws/bin/cfn-init -v",
" --stack ", { "Ref": "AWS::StackName" },
" --resource LaunchConfig",
" --region ", { "Ref" : "AWS::Region" },"\n",
"# Get the CloudWatch Logs agent\n",
"wget https://s3.amazonaws.com/aws-cloudwatch/downloads/latest/awslogs-agent-setup.py\n",
"# Install the CloudWatch Logs agent\n",
"python ./awslogs-agent-setup.py -n -r ", { "Ref" : "AWS::Region" }, " -c /etc/cwlogs.cfg || error_exit 'Failed to run CloudWatch Logs agent setup'\n",
"service awslogs start"
]]}
这篇关于通过cloudformation启动实例后未执行userData的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
