packer provisioning by ansible fails in aws codebuild - amazon-web-services

Question

My Codebuild project that it creates AMI by packer by ansible provisioner.
This packer settings success in my local environment and Amazon linux2 ec2 environment. However, when I use AWS Codebuild with aws/codebuild/amazonlinux2-x86_64-standard:1.0 image and it fails.
I already tried this settings remote_tmp = /tmp or remote_tmp = /tmp/.ansible-${USER}/tmp but did not work.
Authentication or permission failure, did not have permissions on the remote directory
version: 0.2
phases:
install:
runtime-versions:
python: 3.7
pre_build:
commands:
- python --version
- pip --version
- curl -qL -o packer.zip https://releases.hashicorp.com/packer/1.4.3/packer_1.4.3_linux_amd64.zip && unzip packer.zip
- ./packer version
- pip install --user ansible==2.8.5
- ansible --version
- echo 'Validate packer json'
- ./packer validate packer.json
build:
commands:
- ./packer build -color=false packer.json | tee build.log
{
"builders": [{
"type": "amazon-ebs",
"region": "ap-northeast-1",
"ami_regions": "ap-northeast-1",
"source_ami": "ami-0ff21806645c5e492",
"instance_type": "t2.micro",
"ssh_username": "ec2-user",
"ami_name": "packer-quick-start {{timestamp}}",
"ami_description": "created by packer at {{timestamp}}",
"ebs_optimized": false,
"tags": {
"OS_Version": "Amazon Linux AMI 2018.03",
"timestamp": "{{timestamp}}",
"isotime": "{{isotime \"2006-01-02 03:04:05\"}}"
},
"disable_stop_instance": false
}],
"provisioners": [
{
"type" : "ansible",
"extra_arguments": [
"-vvv"
],
"playbook_file" : "ansible/main.yaml"
}
]
}
==> amazon-ebs: Prevalidating AMI Name: packer-quick-start 1569943272
amazon-ebs: Found Image ID: ami-0ff21806645c5e492
==> amazon-ebs: Creating temporary keypair: packer_5d936ee8-541f-5c9a-6955-9672526afc1a
==> amazon-ebs: Creating temporary security group for this instance: packer_5d936ef1-6546-d9d0-60ff-2dc4c011036f
==> amazon-ebs: Authorizing access to port 22 from [0.0.0.0/0] in the temporary security groups...
==> amazon-ebs: Launching a source AWS instance...
==> amazon-ebs: Adding tags to source instance
amazon-ebs: Adding tag: "Name": "Packer Builder"
amazon-ebs: Instance ID: i-04b00db56a8b3b6d0
==> amazon-ebs: Waiting for instance (i-04b00db56a8b3b6d0) to become ready...
==> amazon-ebs: Using ssh communicator to connect: 3.112.61.8
==> amazon-ebs: Waiting for SSH to become available...
==> amazon-ebs: Connected to SSH!
==> amazon-ebs: Provisioning with Ansible...
==> amazon-ebs: Executing Ansible: ansible-playbook --extra-vars packer_build_name=amazon-ebs packer_builder_type=amazon-ebs -o IdentitiesOnly=yes -i /tmp/packer-provisioner-ansible244097143 /codebuild/output/src965785042/src/github.com/repoUsername/reponame/ansible/main.yaml -e ansible_ssh_private_key_file=/tmp/ansible-key242793848 -vvv
amazon-ebs: ansible-playbook 2.8.5
amazon-ebs: config file = /codebuild/output/src965785042/src/github.com/repoUsername/reponame/ansible.cfg
amazon-ebs: configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
amazon-ebs: ansible python module location = /root/.local/lib/python3.7/site-packages/ansible
amazon-ebs: executable location = /root/.local/bin/ansible-playbook
amazon-ebs: python version = 3.7.4 (default, Sep 20 2019, 22:55:10) [GCC 7.3.1 20180303 (Red Hat 7.3.1-5)]
amazon-ebs: Using /codebuild/output/src965785042/src/github.com/repoUsername/reponame/ansible.cfg as config file
amazon-ebs: host_list declined parsing /tmp/packer-provisioner-ansible244097143 as it did not pass it's verify_file() method
amazon-ebs: script declined parsing /tmp/packer-provisioner-ansible244097143 as it did not pass it's verify_file() method
amazon-ebs: auto declined parsing /tmp/packer-provisioner-ansible244097143 as it did not pass it's verify_file() method
amazon-ebs: Parsed /tmp/packer-provisioner-ansible244097143 inventory source with ini plugin
amazon-ebs:
amazon-ebs: PLAYBOOK: main.yaml ************************************************************
amazon-ebs: 1 plays in /codebuild/output/src965785042/src/github.com/repoUsername/reponame/ansible/main.yaml
amazon-ebs:
amazon-ebs: PLAY [all] *********************************************************************
amazon-ebs: META: ran handlers
amazon-ebs:
amazon-ebs: TASK [be sure httpd is installed] **********************************************
amazon-ebs: task path: /codebuild/output/src965785042/src/github.com/repoUsername/reponame/ansible/main.yaml:6
amazon-ebs: <127.0.0.1> ESTABLISH SSH CONNECTION FOR USER: root
amazon-ebs: <127.0.0.1> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o Port=35595 -o 'IdentityFile="/tmp/ansible-key242793848"' -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/root/.ansible/cp/02aaab1733 127.0.0.1 '/bin/sh -c '"'"'echo ~root && sleep 0'"'"''
amazon-ebs: <127.0.0.1> (0, b'/root\n', b"Warning: Permanently added '[127.0.0.1]:35595' (RSA) to the list of known hosts.\r\n")
amazon-ebs: <127.0.0.1> ESTABLISH SSH CONNECTION FOR USER: root
amazon-ebs: <127.0.0.1> SSH: EXEC ssh -C -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o Port=35595 -o 'IdentityFile="/tmp/ansible-key242793848"' -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o 'User="root"' -o ConnectTimeout=10 -o ControlPath=/root/.ansible/cp/02aaab1733 127.0.0.1 '/bin/sh -c '"'"'( umask 77 && mkdir -p "` echo /root/.ansible/tmp/ansible-tmp-1569943320.4544108-49329379039882 `" && echo ansible-tmp-1569943320.4544108-49329379039882="` echo /root/.ansible/tmp/ansible-tmp-1569943320.4544108-49329379039882 `" ) && sleep 0'"'"''
amazon-ebs: <127.0.0.1> (1, b'', b'mkdir: cannot create directory \xe2\x80\x98/root\xe2\x80\x99: Permission denied\n')
amazon-ebs: <127.0.0.1> Failed to connect to the host via ssh: mkdir: cannot create directory ‘/root’: Permission denied
amazon-ebs: fatal: [default]: UNREACHABLE! => {
amazon-ebs: "changed": false,
amazon-ebs: "msg": "Authentication or permission failure. In some cases, you may have been able to authenticate and did not have permissions on the target directory. Consider changing the remote tmp path in ansible.cfg to a path rooted in \"/tmp\". Failed command was: ( umask 77 && mkdir -p \"` echo /root/.ansible/tmp/ansible-tmp-1569943320.4544108-49329379039882 `\" && echo ansible-tmp-1569943320.4544108-49329379039882=\"` echo /root/.ansible/tmp/ansible-tmp-1569943320.4544108-49329379039882 `\" ), exited with result 1",
amazon-ebs: "unreachable": true
amazon-ebs: }
amazon-ebs:
amazon-ebs: PLAY RECAP *********************************************************************
amazon-ebs: default : ok=0 changed=0 unreachable=1 failed=0 skipped=0 rescued=0 ignored=0
amazon-ebs:
==> amazon-ebs: Terminating the source AWS instance...
==> amazon-ebs: Cleaning up any extra volumes...
==> amazon-ebs: No volumes to clean up, skipping
==> amazon-ebs: Deleting temporary security group...
==> amazon-ebs: Deleting temporary keypair...
I know it fails because it tried to mkdir /root and Permission denied.
But don't know why it tried to mkdir /root. How can I change this behavior?

Answer 1

I solved and it was super simple cause.
Because AWS Codebuild builds by the root user, ansible makes a connection by the root user. I just wrote like this and solved it.
"provisioners": [
{
"type" : "ansible",
"user": "ec2-user",
"playbook_file" : "ansible/main.yaml"
}
]
My ansible file is simple for testing.
---
- hosts: all
become: yes
gather_facts: no
tasks:
- name: be sure httpd is installed
yum: name=httpd state=installed
- name: be sure httpd is running and enabled
service: name=httpd state=started enabled=yes