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Git access fails in EC2 instance startup script (Ubuntu)

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4

I am creating an ec2 instance from an AMI using

aws ec2 run-instances [lots of arguments] --user-data file://my_sh_file.sh

my_sh_file.sh looks like this:

su ubuntu # fails with or without this
cd /home/ubuntu/my_working_dir
git pull origin master
. app_startup_script.sh

Git is failing to connect with this error log (from /var/log/cloud-init-output.log):

Host key verification failed.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

If I log in myself (as ubuntu) and call git pull it works fine.

I guess that either (a) su ubuntu isn't working, or (b) (this seems less likely) that the ssh config isn't loaded at this point in the boot sequence... but I'm stumped. Help?

ubuntu amazon-web-services amazon-ec2 git

share|improve this question

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How are you cloning the git repo to begin with? That response suggests it may be an issue with the ssh key.
  
  – Lucas Ramage
  Jun 5 at 15:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  git remote -v please. By the way, do you use ssh-agent?
  
  – kubanczyk
  Jun 5 at 18:00
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't use ssh agent. Git remote: origin ec2-user@[ip of git server]:[repo name] (fetch) origin ec2-user@[ip of git server]:[repo name] (push) I agree it sounds like an access problem but when I log in myself and just call git pull origin master it works fine.
  
  – Omroth
  Jun 5 at 18:16
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ssh key and config is in home/ubuntu/.ssh
  
  – Omroth
  Jun 5 at 18:17
  

  
  
  
  

add a comment | 

4

I am creating an ec2 instance from an AMI using

aws ec2 run-instances [lots of arguments] --user-data file://my_sh_file.sh

my_sh_file.sh looks like this:

su ubuntu # fails with or without this
cd /home/ubuntu/my_working_dir
git pull origin master
. app_startup_script.sh

Git is failing to connect with this error log (from /var/log/cloud-init-output.log):

Host key verification failed.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

If I log in myself (as ubuntu) and call git pull it works fine.

I guess that either (a) su ubuntu isn't working, or (b) (this seems less likely) that the ssh config isn't loaded at this point in the boot sequence... but I'm stumped. Help?

ubuntu amazon-web-services amazon-ec2 git

share|improve this question

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How are you cloning the git repo to begin with? That response suggests it may be an issue with the ssh key.
  
  – Lucas Ramage
  Jun 5 at 15:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  git remote -v please. By the way, do you use ssh-agent?
  
  – kubanczyk
  Jun 5 at 18:00
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't use ssh agent. Git remote: origin ec2-user@[ip of git server]:[repo name] (fetch) origin ec2-user@[ip of git server]:[repo name] (push) I agree it sounds like an access problem but when I log in myself and just call git pull origin master it works fine.
  
  – Omroth
  Jun 5 at 18:16
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ssh key and config is in home/ubuntu/.ssh
  
  – Omroth
  Jun 5 at 18:17
  

  
  
  
  

add a comment | 

I am creating an ec2 instance from an AMI using

aws ec2 run-instances [lots of arguments] --user-data file://my_sh_file.sh

my_sh_file.sh looks like this:

su ubuntu # fails with or without this
cd /home/ubuntu/my_working_dir
git pull origin master
. app_startup_script.sh

Git is failing to connect with this error log (from /var/log/cloud-init-output.log):

Host key verification failed.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

If I log in myself (as ubuntu) and call git pull it works fine.

I guess that either (a) su ubuntu isn't working, or (b) (this seems less likely) that the ssh config isn't loaded at this point in the boot sequence... but I'm stumped. Help?

ubuntu amazon-web-services amazon-ec2 git

share|improve this question

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

aws ec2 run-instances [lots of arguments] --user-data file://my_sh_file.sh

su ubuntu # fails with or without this
cd /home/ubuntu/my_working_dir
git pull origin master
. app_startup_script.sh

Host key verification failed.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

share|improve this question

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

share|improve this question

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

edited Jun 5 at 18:21

Lucas Ramage

12310

edited Jun 5 at 18:21

Lucas Ramage

12310

asked Jun 5 at 15:21

OmrothOmroth

354

asked Jun 5 at 15:21

OmrothOmroth

354

1 Answer
1

active

oldest

votes

3

The way you use sudo Isn’t correct.

First of all it should be sudo -u ubuntu not just sudo ubuntu. However even then it wouldn't work.

When you run sudo it spawns a new shell or if a command is given it runs that command under the ubuntu user. In your case sudo -u ubuntu doesn’t have a command to run and because it is in non-interactive mode it won’t spawn a shell either. It simply exits.

The following lines - cd and git - then run in the context of the UserData script, not under ubuntu user, that's why it fails.

You can do this for example:

sudo -u ubuntu sh -c "cd /home/...; git pull ...; ./app.sh"

That will run all the commands under the ubuntu user.

Hope that helps :)

share|improve this answer

edited Jun 5 at 22:11

answered Jun 5 at 20:53

MLuMLu

10.6k22546

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you :) Perfect.
  
  – Omroth
  Jun 6 at 8:35
  

  
  
  
  

add a comment | 

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3

The way you use sudo Isn’t correct.

First of all it should be sudo -u ubuntu not just sudo ubuntu. However even then it wouldn't work.

When you run sudo it spawns a new shell or if a command is given it runs that command under the ubuntu user. In your case sudo -u ubuntu doesn’t have a command to run and because it is in non-interactive mode it won’t spawn a shell either. It simply exits.

The following lines - cd and git - then run in the context of the UserData script, not under ubuntu user, that's why it fails.

You can do this for example:

sudo -u ubuntu sh -c "cd /home/...; git pull ...; ./app.sh"

That will run all the commands under the ubuntu user.

Hope that helps :)

share|improve this answer

edited Jun 5 at 22:11

answered Jun 5 at 20:53

MLuMLu

10.6k22546

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you :) Perfect.
  
  – Omroth
  Jun 6 at 8:35
  

  
  
  
  

add a comment | 

3

The way you use sudo Isn’t correct.

First of all it should be sudo -u ubuntu not just sudo ubuntu. However even then it wouldn't work.

When you run sudo it spawns a new shell or if a command is given it runs that command under the ubuntu user. In your case sudo -u ubuntu doesn’t have a command to run and because it is in non-interactive mode it won’t spawn a shell either. It simply exits.

The following lines - cd and git - then run in the context of the UserData script, not under ubuntu user, that's why it fails.

You can do this for example:

sudo -u ubuntu sh -c "cd /home/...; git pull ...; ./app.sh"

That will run all the commands under the ubuntu user.

Hope that helps :)

share|improve this answer

edited Jun 5 at 22:11

answered Jun 5 at 20:53

MLuMLu

10.6k22546

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you :) Perfect.
  
  – Omroth
  Jun 6 at 8:35
  

  
  
  
  

add a comment | 

The way you use sudo Isn’t correct.

First of all it should be sudo -u ubuntu not just sudo ubuntu. However even then it wouldn't work.

When you run sudo it spawns a new shell or if a command is given it runs that command under the ubuntu user. In your case sudo -u ubuntu doesn’t have a command to run and because it is in non-interactive mode it won’t spawn a shell either. It simply exits.

The following lines - cd and git - then run in the context of the UserData script, not under ubuntu user, that's why it fails.

You can do this for example:

sudo -u ubuntu sh -c "cd /home/...; git pull ...; ./app.sh"

That will run all the commands under the ubuntu user.

Hope that helps :)

share|improve this answer

edited Jun 5 at 22:11

answered Jun 5 at 20:53

MLuMLu

10.6k22546

sudo -u ubuntu sh -c "cd /home/...; git pull ...; ./app.sh"

share|improve this answer

edited Jun 5 at 22:11

answered Jun 5 at 20:53

MLuMLu

10.6k22546

answered Jun 5 at 20:53

MLuMLu

10.6k22546

answered Jun 5 at 20:53

MLuMLu

10.6k22546