pyodbc and unixODBC for MSSQL as a lambda layer

pyodbc-unixODBC-lambda-layer

# use https://github.com/lambci/docker-lambda to simulate a lambda environment
docker run -it --rm --entrypoint bash -e ODBCINI=/opt/odbc.ini -e ODBCSYSINI=/opt/ lambci/lambda:build-python3.7

# download and install unixODBC
# http://www.unixodbc.org/download.html
curl ftp://ftp.unixodbc.org/pub/unixODBC/unixODBC-2.3.7.tar.gz -O
tar xzvf unixODBC-2.3.7.tar.gz
cd unixODBC-2.3.7

./configure --sysconfdir=/opt --disable-gui --disable-drivers --enable-iconv --with-iconv-char-enc=UTF8 --with-iconv-ucode-enc=UTF16LE --prefix=/opt
make
make install

cd ..
rm -rf unixODBC-2.3.7 unixODBC-2.3.7.tar.gz

# download and install ODBC driver for MSSQL 17
# https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server?view=sql-server-2017
curl https://packages.microsoft.com/config/rhel/6/prod.repo > /etc/yum.repos.d/mssql-release.repo
yum install e2fsprogs.x86_64 0:1.43.5-2.43.amzn1 fuse-libs.x86_64 0:2.9.4-1.18.amzn1 libss.x86_64 0:1.43.5-2.43.amzn1
ACCEPT_EULA=Y yum install msodbcsql17 --disablerepo=amzn*
export CFLAGS="-I/opt/include"
export LDFLAGS="-L/opt/lib"

cd /opt
cp -r /opt/microsoft/msodbcsql17/ .
rm -rf /opt/microsoft/

# install pyodbc for use with python.
# Notice the folder structure to support python 3.7 runtime 
# https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html#configuration-layers-path
mkdir /opt/python/
cd /opt/python/
pip install pyodbc -t .

cd /opt
cat <<EOF > odbcinst.ini
[ODBC Driver 17 for SQL Server]
Description=Microsoft ODBC Driver 17 for SQL Server
Driver=/opt/msodbcsql17/lib64/libmsodbcsql-17.3.so.1.1
UsageCount=1
EOF

cat <<EOF > odbc.ini
[ODBC Driver 17 for SQL Server]
Driver = ODBC Driver 17 for SQL Server
Description = My ODBC Driver 17 for SQL Server
Trace = No
EOF

# package the content in a zip file to use as a lambda layer
cd /opt
zip -r9 ~/pyodbc-layer.zip .

# to test it locally:
# unzip the content of your layer to your local environment, to /var/opt/ for example:
unzip pyodbc-layer.zip -d /var/opt/

# In your local environment, have your lambda function handy at /var/task/lambda_function.py

import pyodbc
server = 'myserver'
database =  'mydb'
username = 'myuser'
password = 'mypwd'

def lambda_handler(event, context):
    # TODO implement
    cnxn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)
    cursor = cnxn.cursor()
    cursor.execute("select @@version;")
    row = cursor.fetchone()
    while row:
        print(row[0])
        row = cursor.fetchone()

# Time to test
docker run --rm -v /var/task:/var/task -v /var/opt:/opt lambci/lambda:python3.7 lambda_function.lambda_handler '{"some": "event"}'

# useful links
https://medium.com/devopslinks/aws-lambda-microsoft-sql-server-how-to-66c5f9d275ed
https://stackoverflow.com/questions/47682991/aws-lambda-function-to-connect-to-sql-server-with-python
https://gist.github.com/carlochess/658a98589709f46dbb3d20502e48556b

Here's a Python 3.9 version that's working for me. I've also published it on StackOverflow here.

Based on:

• Python 3.9
• AWS's base images for Lambda (b/c lambci is in maintenance mode and doesn't have python 3.9)
• unixODBC-2.3.11
• https://packages.microsoft.com/config/rhel/7 (instead of rhel/6)

# Dockerfile
# See https://stackoverflow.com/a/72617192/58876

FROM amazon/aws-lambda-python:3.9
ENTRYPOINT []

WORKDIR /root

# Get development tools to enable compiling
RUN yum -y update
RUN yum -y groupinstall "Development Tools"

# Get unixODBC and install it
RUN yum -y install tar gzip
RUN curl ftp://ftp.unixodbc.org/pub/unixODBC/unixODBC-2.3.11.tar.gz -O
RUN tar xvzf unixODBC-2.3.11.tar.gz
WORKDIR /root/unixODBC-2.3.11
RUN ./configure --sysconfdir=/opt/python --disable-gui --disable-drivers --enable-iconv --with-iconv-char-enc=UTF8 --with-iconv-ucode-enc=UTF16LE --prefix=/root/unixODBC-install
RUN make install
RUN mv /root/unixODBC-install/bin /opt/bin
RUN mv /root/unixODBC-install/lib /opt/lib
WORKDIR /root

# Install msodbcsql
RUN curl https://packages.microsoft.com/config/rhel/7/prod.repo > /etc/yum.repos.d/mssql-release.repo
RUN yum -y install e2fsprogs openssl
RUN ACCEPT_EULA=Y yum -y install msodbcsql mssql-tools --disablerepo=amzn*
RUN rm -r /opt/microsoft/msodbcsql

# Install pyodbc
# Need "unixODBC-devel" to avoid "src/pyodbc.h:56:10: fatal error: sql.h: No such file or directory" during pip install
RUN yum -y install unixODBC-devel
RUN export CFLAGS="-I/opt/microsoft/msodbcsql17/include"
RUN export LDFLAGS="-L/opt/microsoft/msodbcsql17/lib"
RUN pip install pyodbc==4.0.32 adodbapi==2.6.2.0 pyDes==2.0.1 --upgrade --target /opt/python

# Add a requirements.txt file and enable this section to install other (non sql server) data-load requirements
# COPY requirements.txt /tmp/requirements.txt
# RUN pip install --requirement /tmp/requirements.txt --target /opt/python

# Create odbc.ini and odbcinst.ini
RUN echo $'[ODBC Driver 17 for SQL Server]\nDriver = ODBC Driver 17 for SQL Server\nDescription = My ODBC Driver 17 for SQL Server\nTrace = No' > /opt/python/odbc.ini
RUN so_file=$(ls /opt/microsoft/**/lib64/libmsodbcsql-*.so.* | grep msodbcsql17) && echo $'[ODBC Driver 17 for SQL Server]\nDescription = Microsoft ODBC Driver 17 for SQL Server\nDriver = '"$so_file"$'\nUsageCount = 1' > /opt/python/odbcinst.ini

# Generate the zipped file that can be uploaded as a Lambda Layer
WORKDIR /opt
RUN zip -r /layer.zip .

# Build the image (this will take a while...)
$ docker build --platform=linux/amd64 -t mssql-lambda .
# Copy the zipped file to /tmp/layer.zip on your computer
$ docker run --platform=linux/amd64 --rm --volume /tmp:/tmp mssql-lambda cp /layer.zip /tmp/

Upload /tmp/layer.zip from your computer to AWS as a Lambda Layer.

Create a Python 3.9 Lambda to test the layer:

import pyodbc

def lambda_handler(event, context):
    driver = '{ODBC Driver 17 for SQL Server}'
    server = 'XXX'
    port = '1433'
    database =  'XXX'
    username = 'XXX'
    password = 'XXX' # ideally put this in a SecretsManager secret instead of directly in the code
    connection = pyodbc.connect(f'DRIVER={driver};SERVER={server},{port};DATABASE={database};UID={username};PWD={password}')
    cursor = connection.cursor()
    query = """
        select @@version
    """

    cursor.execute(query)

    for row in cursor.fetchall():
        print(row[0])

Hi,

I'm trying to configure Lambda with python runtime and I try to connect to a PG instance, I have unixodbc files and the odbc files for pg and I get the following error:
[unixODBC][Driver Manager]Can't open lib '/var/task/lib/psqlodbcw.so' : file not found

I tried both WSL and CentOS machine to get the files from,
the way I did it was: downloading the jar file for unixODBC and configuring it using the /var/task path then make and make install,
and I did the same for the postgresql-odbc: downloaded the jar file, configured it to the /var/task path then make and make install,
and then I had the following content:

inside lib I had this:

then I copied the entire /var/task folder to the windows machine, changed the ini file as specified above, and .ziped it and uploaded it to AWS Lambda using CDK and python.

odbcinst.ini is:
[PostgreSQL Unicode]
Description=Postgres odbc
Driver=/var/task/lib/psqlodbcw.so
UsageCount=1

and odbc.ini is:
[PostgreSQL Unicode]
Driver = PostgreSQL Unicode
Description = My ODBC Driver For PostgreSQL
Trace = No

also from within the lambda function itself, I export 2 env for the .ini files:
os.environ['ODBCINI']="/var/task"
os.environ['ODBCSYSINI']="/var/task"

for some reason its just not working :|
somebody knows how to fix it for pyodbc and postgres?

@hben-align I have never used pyodbc to connect to PG instances, it seems that your process is more or less correct, but with .so files its always hard to actually detect what might be wrong. Someone else more knowledgeable in that field might provide more help.

But I ask, why not using psycopg2 to connect to PG instance? Here is the already built layer for lambda. I use that layer in production on the daily, it's great!

@alexanderluiscampino I used psycopg2 (which I compiled myself) but this project was written using pyodbc for consistency (due to the compatibility with other engines)...
if I have no other choice I'll change the code to psycopg2, but I'm trying to avoid it for now because its a lot of work :\

btw, I've managed to get it working on a local ubuntu machine, but in lambda I still get the "[unixODBC][Driver Manager]Can't open lib '/var/task/lib/psqlodbcw.so' : file not found" error...
even when zipping the working dir from ubuntu

lol, printing the directory after the failure print out the file in the right path :\\

@alexanderluiscampino
I've managed to make it work (pyodbc with pg odbc)
I'll post here a comment with how I did it later :)

This method is for using pyodbc with pg odbc inside the task (not as a layer)

create a new ec2 machine with amazon linux 2.

then run:
sudo yum update

cd /home/ec2-user

download unixODBC and postgresql odbc

curl ftp://ftp.unixodbc.org/pub/unixODBC/unixODBC-2.3.11.tar.gz -O
curl https://ftp.postgresql.org/pub/odbc/versions/src/psqlodbc-13.02.0000.tar.gz -O
tar xzvf unixODBC-2.3.11.tar.gz
tar -zxvf psqlodbc-13.02.0000.tar.gz

compile unixODBC (install necessary packages)

cd /home/ec2-user/unixODBC-2.3.11/
sudo yum groupinstall "Development Tools"
./configure --sysconfdir=/var/task --disable-gui --disable-drivers --enable-iconv --with-iconv-char-enc=UTF8 --with-iconv-ucode-enc=UTF16LE --prefix=/var/task
sudo make
sudo make install

compile psqlodbc (install necessary packages)

cd /home/ec2-user/psqlodbc-13.02.0000/
sudo amazon-linux-extras enable postgresql9.6
sudo yum install -y postgresql-libs postgresql-server postgresql postgresql-devel
./configure --with-libpq=/var/task --with-unixodbc=/var/task --sysconfdir=/var/task --prefix=/var/task
sudo make
sudo make install

fill up nessesery libs (using root permissions)

sudo su
cd /var/task/lib
cp /lib64/libpq.so.5 .
cp /lib64/libdl.so.2 .
cp /lib64/libpthread.so.0 .
cp /lib64/libc.so.6 .
cp /lib64/libssl.so.10 .
cp /lib64/libcrypto.so.10 .
cp /lib64/libgssapi_krb5.so.2 .
cp /lib64/libldap_r-2.4.so.2 .
cp /lib64/ld-linux-x86-64.so.2 .
cp /lib64/libkrb5.so.3 .
cp /lib64/libcom_err.so.2 .
cp /lib64/libk5crypto.so.3 .
cp /lib64/libz.so.1 .
cp /lib64/libkrb5support.so.0 .
cp /lib64/libkeyutils.so.1 .
cp /lib64/libresolv.so.2 .
cp /lib64/liblber-2.4.so.2 .
cp /lib64/libsasl2.so.3 .
cp /lib64/libssl3.so .
cp /lib64/libsmime3.so .
cp /lib64/libnss3.so .
cp /lib64/libnssutil3.so .
cp /lib64/libplds4.so .
cp /lib64/libplc4.so .
cp /lib64/libnspr4.so .
cp /lib64/libselinux.so.1 .
cp /lib64/libcrypt.so.1 .
cp /lib64/librt.so.1 .
cp /lib64/libpcre.so.1 .

cd /var/task
zip -r /home/ec2-user/task.zip .

change .ini files as stated above

odbc.ini:
[PostgreSQL Unicode]
Driver=PostgreSQL
Description = My ODBC Driver For PostgreSQL
Trace = No

odbcinst.ini:
[PostgreSQL]
Description=Postgres odbc
Driver=/var/task/lib/psqlodbcw.so
UsageCount=1

now call the driver by using "PostgreSQL"

@hben-align : Can you please share the zip package you generated for postgresql for pyodbc?

Is anyone able to create lambda layer(python 3.9) for postgres pyodbc ?

I just created lambda layer zip for python3.8 and everything is working and tested! Thanks everyone in this gist and Tom! https://github.com/naingaungphyo/lambda_pyodbc_layer-python3.8

thanks for this!

@jordan-brough

any ideas about this? Running in WSL2 via Docker Desktop Windows

 ERROR [16/25] RUN ACCEPT_EULA=Y yum -y install msodbcsql mssql-tools --disablerepo=amzn*                       0.7s
------
 > [16/25] RUN ACCEPT_EULA=Y yum -y install msodbcsql mssql-tools --disablerepo=amzn*:
#19 0.405 Loaded plugins: ovl
#19 0.471 Resolving Dependencies
#19 0.472 --> Running transaction check
#19 0.472 ---> Package msodbcsql.x86_64 0:13.1.9.2-1 will be installed
#19 0.485 --> Processing Dependency: unixODBC >= 2.3.1 for package: msodbcsql-13.1.9.2-1.x86_64
#19 0.494 --> Processing Dependency: libodbcinst.so.2()(64bit) for package: msodbcsql-13.1.9.2-1.x86_64
#19 0.494 ---> Package mssql-tools.x86_64 0:17.10.1.1-1 will be installed
#19 0.495 --> Processing Dependency: msodbcsql17 >= 17.3.0.0 for package: mssql-tools-17.10.1.1-1.x86_64
#19 0.499 --> Running transaction check
#19 0.499 ---> Package msodbcsql17.x86_64 0:17.10.2.1-1 will be installed
#19 0.499 ---> Package unixODBC.x86_64 0:2.3.11-1.rh will be installed
#19 0.499 --> Processing Dependency: libltdl.so.7()(64bit) for package: unixODBC-2.3.11-1.rh.x86_64
#19 0.525 --> Finished Dependency Resolution
#19 0.526 Error: Package: unixODBC-2.3.11-1.rh.x86_64 (packages-microsoft-com-prod)
#19 0.526            Requires: libltdl.so.7()(64bit)
#19 0.526  You could try using --skip-broken to work around the problem
#19 0.689  You could try running: rpm -Va --nofiles --nodigest
------
executor failed running [/bin/sh -c ACCEPT_EULA=Y yum -y install msodbcsql mssql-tools --disablerepo=amzn*]: exit code: 1

nevermind. all good. If anyone else has the issue, i added
RUN yum -y install libtool-ltdl
before
RUN ACCEPT_EULA=Y yum -y install msodbcsql mssql-tools --disablerepo=amzn*