libsect283k1_ubuntu.so: cannot open shared object file

[jerkyrs]

1. what i did
   built the server as per instructions and ran make server
   I tried this both on a dedicated Centos7 build as well as using Docker container

[iotex@localhost ~]$ docker attach 75df525c0e90
root@75df525c0e90:/go/src/github.com/iotexproject/iotex-core# make run
go build -o ./bin/server -v ./server
./bin/server -config=e2etests/config_local_delegate.yaml -log-level=debug
./bin/server: error while loading shared libraries: libsect283k1_ubuntu.so: cannot open shared object file: No such file or directory
Makefile:59: recipe for target 'run' failed
make: *** [run] Error 127

There is also no running process in docker container, by running the following inside of container or in my build directory

root@c8290f10f0c2:/go# iotex-server
iotex-server: error while loading shared libraries: libsect283k1_ubuntu.so: cannot open shared object file: No such file or directory

[zjshen14]

This is because you've not setup LD_LIBRARY_PATH. libsect283k1_ubuntu.so isn't in a standard shared lib dir. See http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html.

BTW, be aware that the lib will still not work for you because you're in centos instead of ubuntu. We've not supported centos yet.

[jerkyrs]

where do i get this library from? i appreciate that it won't work on Centos7 but the container i assume should have this library installed. Is this library custom or is it provided by Ubuntu repositories? I do not see much reference outside of this project

[zjshen14]

Yes, this is our custom library.

[jerkyrs]

is it available on a repository somewhere, a bit stuck without it.

[zjshen14]

It's under <project_root>/crypto/lib/libsect283k1_ubuntu.so

[jerkyrs]

I only see Header files here, is there C file to compile to Shared library? I assume i would need to do something like the following assuming i had the C

gcc -c sect283k1.c -fPIC
ld -shared --soname libsect283k1_centos.so sect283k1.o

[jerkyrs]

So temporary work around

export LD_LIBRARY_PATH=/go/src/github.com/iotexproject/iotex-core/crypto/lib/:$LD_LIBRARY_PATH
iotex-server -config /etc/iotex/config.yaml -log-path /var/log/iotex/server.log &

We can set this in Dockerfile ENV

ENV LD_LIBRARY_PATH=/go/src/github.com/iotexproject/iotex-core/crypto/lib/:$LD_LIBRARY_PATH

[zjshen14]

1. for make run, please wait for the fix tonight
2. Dockerfile doesn't need setting LD_LIBRARY_PATH

[zjshen14]

The problem should have been fixed. make run should work from project root dir (mac os and ubuntu). Feel free to reopen the issue if you find it's not.

[jerkyrs]

How can i compile the library for centos, are we missing the C files. It works as expected now for Docker container i can start iotex-server without shared library.

[zjshen14]

It works as expected now for Docker container i can start iotex-server without shared library.

You're actually using the shared library. You don't need to setup LD_LIBRARY_PATH because we cp the library to the standard path.

[jerkyrs]

How can i build it for Centos though ?

[zjshen14]

We currently only ship the library binary, so that you're not able to build it on centos. We're still testing it with different linux distributions.

[jerkyrs]

i assume sect283k1 is your lightweight ECC implementation ?

[wyh136]

copy /go/src/github.com/iotexproject/iotex-core/crypto/lib/ibsect283k1_ubuntu.so /usr/lib
make run

problem solved.

[jerkyrs]

@wyh136 bit of a hack but yes that will work, if you get any updates to this library in future you need to ensure you are using latest version so that should be done within your build, Iotex actually have a working Docker image (sort of most recent has bug)

From Dockerfile

 cp $GOPATH/src/github.com/iotexproject/iotex-core/crypto/lib/libsect283k1_ubuntu.so /usr/lib/ 

As this is part of Dockerfile it is updated each time you pull latest and re-run docker build