How to use a custom ssh key location with Spring Cloud Config

Question

I am trying to setup a Spring Cloud Config server that uses a custom location for the ssh private key. The reason i need to specify a custom location for the key is because the

Answer 1

The FixedSshSessionFactory solution of @Jeffrey Zampieron is good. However it won't work if packaging the spring boot app as a fat jar.

Polish it a bit for working with fat jar,

/**
 * @file FixedSshSessionFactory.java
 * @date Aug 23, 2016 2:16:11 PM
 * @author jzampieron
 */

import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import lombok.extern.slf4j.Slf4j;
import org.eclipse.jgit.transport.JschConfigSessionFactory;
import org.eclipse.jgit.transport.OpenSshConfig.Host;
import org.eclipse.jgit.util.FS;
import org.springframework.util.StreamUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

/**
 * Short Desc Here.
 *
 * @author jzampieron
 */
@Slf4j
public class FixedSshSessionFactory extends JschConfigSessionFactory {

    protected URL[] identityKeyURLs;

    /**
     * @param url
     */
    public FixedSshSessionFactory(URL... identityKeyURLs) {
        this.identityKeyURLs = identityKeyURLs;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jgit.transport.JschConfigSessionFactory#configure(org.eclipse.jgit.transport.OpenSshConfig.Host, com.jcraft.jsch.Session)
     */
    @Override
    protected void configure(Host hc, Session session) {
        // nothing special needed here.
    }

    /* (non-Javadoc)
     * @see org.eclipse.jgit.transport.JschConfigSessionFactory#getJSch(org.eclipse.jgit.transport.OpenSshConfig.Host, org.eclipse.jgit.util.FS)
     */
    @Override
    protected JSch getJSch(Host hc, FS fs) throws JSchException {
        JSch jsch = super.getJSch(hc, fs);
        // Clean out anything 'default' - any encrypted keys
        // that are loaded by default before this will break.
        jsch.removeAllIdentity();
        int count = 0;
        for (final URL identityKey : identityKeyURLs) {
            try (InputStream stream = identityKey.openStream()) {
                jsch.addIdentity("key" + ++count, StreamUtils.copyToByteArray(stream), null, null);
            } catch (IOException e) {
                logger.error("Failed to load identity " + identityKey.getPath());
            }
        }
        return jsch;
    }


}