AWS WordPress with EFS - aws-cloudformation

Question

I building an AutoScaling WordPress Enviroment but have a question on EFS while setting up a CF Template. Am I suppose to mount the EFS on top of the existing WP Directory i.e /var/www/html or copy the WordPress Files to the EFS and then mount it to /var/www/html?

Answer 1

So WordPress backed by EFS.
Firstly you will create the EFS, then mounting is done. After that one cron job will be written to copy all the Wordpress files from var/www/html to mounted directory.
creating EFS
option_settings:
aws:elasticbeanstalk:customoption:
EFSVolumeName: "EFS_Wordpress"
VPCId: "vpc-xxxx"
## Subnet Options
SubnetA: "subnet-xxxx"
SubnetB: "subnet-xxxx"
SubnetC: "subnet-xxxx"
aws:elasticbeanstalk:application:environment:
FILE_SYSTEM_ID: '`{"Ref" : "FileSystem"}`'
MOUNT_DIRECTORY: '/wpfiles'
REGION: '`{"Ref": "AWS::Region"}`'
Resources:
## Mount Target Resources
MountTargetA:
Type: AWS::EFS::MountTarget
Properties:
FileSystemId: {Ref: FileSystem}
SecurityGroups:
- {Ref: MountTargetSecurityGroup}
SubnetId:
Fn::GetOptionSetting: {OptionName: SubnetA}
MountTargetB:
Type: AWS::EFS::MountTarget
Properties:
FileSystemId: {Ref: FileSystem}
SecurityGroups:
- {Ref: MountTargetSecurityGroup}
SubnetId:
Fn::GetOptionSetting: {OptionName: SubnetB}
MountTargetC:
Type: AWS::EFS::MountTarget
Properties:
FileSystemId: {Ref: FileSystem}
SecurityGroups:
- {Ref: MountTargetSecurityGroup}
SubnetId:
Fn::GetOptionSetting: {OptionName: SubnetC}
##############################################
#### Do not modify values below this line ####
##############################################
FileSystem:
Type: AWS::EFS::FileSystem
Properties:
FileSystemTags:
- Key: Name
Value:
Fn::GetOptionSetting: {OptionName: EFSVolumeName, DefaultValue: "EFS_Wordpress"}
MountTargetSecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupDescription: Security group for mount target
SecurityGroupIngress:
- FromPort: '2049'
IpProtocol: tcp
SourceSecurityGroupId:
Fn::GetAtt: [AWSEBSecurityGroup, GroupId]
ToPort: '2049'
VpcId:
Fn::GetOptionSetting: {OptionName: VPCId}
mounting EFS
container_commands:
1chown:
command: "chown webapp:webapp /wpfiles"
2create:
command: "sudo -u webapp mkdir -p wp-content/uploads"
3link:
command: "sudo -u webapp ln -s /wpfiles wp-content/uploads"
option_settings:
aws:elasticbeanstalk:application:environment:
FILE_SYSTEM_ID: '`{"Ref" : "FileSystem"}`'
MOUNT_DIRECTORY: '/wpfiles'
REGION: '`{"Ref": "AWS::Region"}`'
packages:
yum:
nfs-utils: []
jq: []
commands:
01_mount:
command: "/tmp/mount-efs.sh"
files:
"/tmp/mount-efs.sh":
mode: "000755"
content : |
#!/bin/bash
EFS_REGION=$(/opt/elasticbeanstalk/bin/get-config environment | jq -r '.REGION')
EFS_MOUNT_DIR=$(/opt/elasticbeanstalk/bin/get-config environment | jq -r '.MOUNT_DIRECTORY')
EFS_FILE_SYSTEM_ID=$(/opt/elasticbeanstalk/bin/get-config environment | jq -r '.FILE_SYSTEM_ID')
echo "Mounting EFS filesystem ${EFS_DNS_NAME} to directory ${EFS_MOUNT_DIR} ..."
echo 'Stopping NFS ID Mapper...'
service rpcidmapd status &> /dev/null
if [ $? -ne 0 ] ; then
echo 'rpc.idmapd is already stopped!'
else
service rpcidmapd stop
if [ $? -ne 0 ] ; then
echo 'ERROR: Failed to stop NFS ID Mapper!'
exit 1
fi
fi
echo 'Checking if EFS mount directory exists...'
if [ ! -d ${EFS_MOUNT_DIR} ]; then
echo "Creating directory ${EFS_MOUNT_DIR} ..."
mkdir -p ${EFS_MOUNT_DIR}
if [ $? -ne 0 ]; then
echo 'ERROR: Directory creation failed!'
exit 1
fi
else
echo "Directory ${EFS_MOUNT_DIR} already exists!"
fi
mountpoint -q ${EFS_MOUNT_DIR}
if [ $? -ne 0 ]; then
echo "mount -t nfs4 -o nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2 ${EFS_FILE_SYSTEM_ID}.efs.${EFS_REGION}.amazonaws.com:/ ${EFS_MOUNT_DIR}"
mount -t nfs4 -o nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2 ${EFS_FILE_SYSTEM_ID}.efs.${EFS_REGION}.amazonaws.com:/ ${EFS_MOUNT_DIR}
if [ $? -ne 0 ] ; then
echo 'ERROR: Mount command failed!'
exit 1
fi
chmod 777 ${EFS_MOUNT_DIR}
runuser -l ec2-user -c "touch ${EFS_MOUNT_DIR}/it_works"
if [[ $? -ne 0 ]]; then
echo 'ERROR: Permission Error!'
exit 1
else
runuser -l ec2-user -c "rm -f ${EFS_MOUNT_DIR}/it_works"
fi
else
echo "Directory ${EFS_MOUNT_DIR} is already a valid mountpoint!"
fi
echo 'EFS mount complete.'
Copying files to Mount Directory
files:
"/tmp/wpcopysymlink.sh":
mode: "000755"
content : |
#!/bin/bash
## ebextensions check if Symlink and wp is already installed if not copy it to EFS
echo "Time: $(date). Checking to see Wordpress is already in EFS or not..."
if [ ! -d /wpfiles/wp-admin ]; then
echo "Wordpress isn't installed I'm going to copy the base install to the EFS Shared directory /wpfiles ..."
cp -r /var/app/current/* /wpfiles
if [ $? -ne 0 ]; then
echo 'ERROR: Directory Copy failed!'
exit 1
fi
else
echo "Wordpress is already there /wpfiles/wp-admin already exists!"
fi
echo 'Checking to see if the symlink is there from the app dir to EFS or not...'
if [ -L /var/app/current ] ; then
echo "Good link so your good to go"
else
echo "No link so I'm removing the directory and creating the symlink in it's place to EFS"
rm -rf /var/app/current
ln -s /wpfiles /var/app/current
fi
echo "Time: $(date). All done for EFS"
Now you can write a cron job which will run after every 5min to copy all the files to mount directory.
For ref:- https://github.com/karan6190/WordpressAutoScalable-EFS