I have a VM startup script which is supposed to show me which instance behind the load balancer is serving the traffic. Unfortionately the variable is not working correctly. Below is the simple script:
#! /bin/bash
sudo apt-get update
sudo apt-get install apache2 -y
sudo a2ensite default-ssl
sudo a2enmod SSL
sudo vm_hostname="$(curl -H "Metadata-Flavor:Google" \
http://169.254.169.254/computeMetadata/v1/instance/hostname)"
sudo echo "Page served from: $vm_hostname" | \
tee /var/www/html/index.html
The result I see is simply the following in the browser window:
Page served from:
Does anyone see a possible issue with the line calling the metadata?
You need to remove sudo from the six steps it will be like the script below.
vm_hostname="$(curl -H "Metadata-Flavor:Google" \ http://169.254.169.254/computeMetadata/v1/instance/hostname)"
Your final script will be:
#! /bin/bash
sudo apt-get update
sudo apt-get install apache2 -y
sudo a2ensite default-ssl
sudo a2enmod SSL
vm_hostname="$(curl -H "Metadata-Flavor:Google" \
http://169.254.169.254/computeMetadata/v1/instance/hostname)"
sudo echo "Page served from: $vm_hostname" | \
tee /var/www/html/index.html
Related
I have installed docker and httpd on an instance and when I run
sudo docker run -d -p 8600:8080 pengbai/docker-supermario
in SSH, The command works but when I Restart the Instance with this user data(docker and httpd already installed)
#!/bin/bash
sudo yum update -y
sudo systemctl enable httpd
sudo systemctl start httpd
sudo systemctl enable docker
sudo systemctl start docker
sudo docker run -d -p 8600:8080 pengbai/docker-supermario
It does not work
I have tried it with sudo, without sudo and even added a sleep command between some of the commands but still couldn't get it to work.
this is how my user data looks like, but docker is not installed, when connecting to my ec2 machine:
sudo yum -y install docker
sudo service docker start
sudo docker pull nginx
sudo docker run -d -p 80:80 nginx
what can I do?
When using user-data script you can debug what is happening by ssh connecting to the instance and check the output in cloud-init-output.log.
sudo cat /var/log/cloud-init-output.log
When doing this you'll find an strange error containing:
Jan 29 11:58:25 cloud-init[2970]: __init__.py[WARNING]: Unhandled non-multipart (text/x-not-multipart) userdata: 'sudo yum -y install dock...'
Which means that the default interpreter seems to be python and it's neccesary to start the user-data with #!/bin/bash. (See this other StackOverflow answer)
When changing the user-data to:
#!/bin/bash
sudo yum -y install docker
sudo service docker start
sudo docker pull nginx
sudo docker run -d -p 80:80 nginx
it will be executed as expected and you will find nginx running on your ec2.
Dockerfile
FROM ubuntu:18.04
RUN apt-get update
RUN apt-get install build-essential -y
WORKDIR /app
COPY . /app/
# Python
RUN apt-get install python3-pip -y
RUN python3 -m pip install virtualenv
RUN python3 -m virtualenv /env36
ENV VIRTUAL_ENV /env36
ENV PATH /env36/bin:$PATH
RUN pip install --upgrade pip
RUN pip install -r requirements.txt
# Start Daphne [8443]
ENV DJANGO_SETTINGS_MODULE=settings
CMD daphne -e ssl:8443:privateKey=/ssl-cert/privkey.pem:certKey=/ssl-cert/fullchain.pem asgi:application
# Open port 8443
EXPOSE 8443
Enable Google IP Alias in order that we may connect to Google Memorystore/Redis
Build & Push
$ docker build -t [GCR_NAME] -f path/to/Dockerfile .
$ docker tag [GCR_NAME] gcr.io/[GOOGLE_PROJECT_ID]/[GCR_NAME]:[TAG]
$ docker push gcr.io/[GOOGLE_PROJECT_ID]/[GCR_NAME]:[TAG]
Deploy to GKE
$ envsubst < k8s.yml > patched_k8s.yml
$ kubectl apply -f patched_k8s.yml
$ kubectl rollout status deployment/[GKE_WORKLOAD_NAME]
I configured Daphne on GKE/GCR. If you guys have other solutions, please give me your advice.
system is not included in the Ubuntu:18.04 docker image.
Add an ENTRYPOINT to your Dockerfile with commands in ExecStart property of project-daphne.service.
I am attempting to run AWSEBCLI inside a docker container. I am passing the access key and security token as env vars as described in the docs under "Configuration Settings and Precedence"
ERROR: CredentialsError - Operation Denied. You appear to have no credentials
Here is my docker file
FROM circleci/golang
ADD . /go/src
WORKDIR /go/src
RUN sudo apt-get -y -qq update --assume-yes
RUN sudo apt-get install python-pip python-dev build-essential --assume-yes
RUN sudo pip install awscli=="1.16.9"
RUN sudo pip install awsebcli=="3.14.4"
RUN echo ${AWS_ACCESS_KEY_ID}
RUN echo ${AWS_SECRET_ACCESS_KEY}
CMD sudo eb deploy Circledocker
The environment defined in your user session and the sudo session are not the same.
RUN echo ${AWS_ACCESS_KEY_ID} -> Works
RUN sudo echo ${AWS_ACCESS_KEY_ID} -> Will not provide you the value.
Take a look at man sudo, the -E flag :
-E, --preserve-env
Indicates to the security policy that the user wishes to preserve their
existing environment variables. The security policy may return an error
if the user does not have permission to preserve the environment.
So this normally works :
sudo -E bash -c 'echo $AWS_ACCESS_KEY_ID'
Try your eb deploy command like this :
sudo -E bash -c 'eb deploy Circledocker'
Hope it helps !
I have a docker image that installs phalcon onto a Docker image. Here is the Dockerfile:
FROM ubuntu:trusty
MAINTAINER Fernando Mayo <fernando#tutum.co>, Feng Honglin <hfeng#tutum.co>
# Install packages
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update && \
sudo apt-get -y install supervisor php5-dev libpcre3-dev gcc make php5-mysql git curl unzip apache2 libapache2-mod-php5 mysql-server php5-mysql pwgen php-apc php5-mcrypt php5-curl && \
echo "ServerName localhost" >> /etc/apache2/apache2.conf
# Add image configuration and scripts
ADD start-apache2.sh /start-apache2.sh
ADD start-mysqld.sh /start-mysqld.sh
ADD run.sh /run.sh
RUN chmod 755 /*.sh
ADD my.cnf /etc/mysql/conf.d/my.cnf
ADD supervisord-apache2.conf /etc/supervisor/conf.d/supervisord-apache2.conf
ADD supervisord-mysqld.conf /etc/supervisor/conf.d/supervisord-mysqld.conf
ADD php.ini /etc/php5/cli/php.ini
ADD 000-default.conf /etc/apache2/sites-available/000-default.conf
ADD 30-phalcon.ini /etc/php5/apache2/conf.d/30-phalcon.ini
ADD 30-phalcon.ini /etc/php5/cli/conf.d/30-phalcon.ini
#RUN rm -rd /var/www/html/*
#RUN git clone --depth=1 git://github.com/phalcon/cphalcon.git /var/www/html/cphalcon
#RUN chmod 755 /var/www/html/cphalcon/build/install
#CMD["/var/www/html/cphalcon/build/install"]
RUN git clone --depth=1 git://github.com/phalcon/cphalcon.git /usr/local/src/cphalcon
RUN cd /usr/local/src/cphalcon/build && ./install ;\
echo "extension=phalcon.so" > /etc/php5/mods-available/phalcon.ini ;\
php5enmod phalcon
RUN sudo service apache2 stop
RUN sudo service apache2 start
# Remove pre-installed database
RUN rm -rf /var/lib/mysql/*
# Add MySQL utils
ADD create_mysql_admin_user.sh /create_mysql_admin_user.sh
RUN chmod 755 /*.sh
# config to enable .htaccess
RUN a2enmod rewrite
# Copy over private key, and set permissions
ADD .ssh /root/.ssh
# Get aws stuff
RUN curl "https://s3.amazonaws.com/aws-cli/awscli-bundle.zip" -o "awscli-bundle.zip"
RUN unzip awscli-bundle.zip
RUN ./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws
RUN rm -rd /var/www/html/*
RUN git clone ssh://git-codecommit.us-east-1.amazonaws.com/v1/repos/Demo-Server /var/www/html
#Environment variables to configure php
ENV PHP_UPLOAD_MAX_FILESIZE 10M
ENV PHP_POST_MAX_SIZE 10M
# Add volumes for MySQL
VOLUME ["/etc/mysql", "/var/lib/mysql" ]
EXPOSE 80 3306
CMD ["/run.sh"]
When I run this Docker image locally it works fine, but when I run it on Elastic Beanstalk I get the error: PHP Fatal error: Class 'Phalcon\Loader' not found. To debug this I checked phpinfo() both locally and on the AWS server. Locally it shows all of the phalcon files installed, but on AWS I don't get any info about CPhalcon. How could the Docker image install Phalcon correctly when running on my local machine but not on Elastic Beanstalk?