Hydra zh4n7wm

Configure Git to use a proxy

In Brief

You may need to configure a proxy server if you're having trouble cloning or fetching from a remote repository or getting an error like unable to access '...' Couldn't resolve host '...'.

Consider something like:

If you created your key pair using AWS, you can use the OpenSSL tools to generate a fingerprint as follows:

$ openssl pkcs8 -in path_to_private_key -inform PEM -outform DER -topk8 -nocrypt | openssl sha1 -c

If you created a key pair using a third-party tool and uploaded the public key to AWS, you can use the OpenSSL tools to generate the fingerprint as follows:

$ openssl rsa -in path_to_private_key -pubout -outform DER | openssl md5 -c

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

How to Change Open Files Limit on OS X and macOS

This text is the section about OS X Yosemite (which also works for macOS Sierra) from https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/#mac-os-x

The last time i visited this link it was dead (403), so I cloned it here from the latest snapshot in Archive.org's Wayback Machine https://web.archive.org/web/20170523131633/https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/

	import com.cloudbees.plugins.credentials.*;
	import com.cloudbees.plugins.credentials.domains.Domain;
	import org.jenkinsci.plugins.plaincredentials.impl.FileCredentialsImpl;

	//
	// modify fileName to match the filename of the secret(s) you want to print.
	// (ID would probably be more helpful... yay stack overflow copy pasta)
	// alternatively comment out the filter [line 15] to dump all secret files.
	//
	def fileName = "secrets.env"

	apiVersion: v1
	kind: ConfigMap
	metadata:
	name: imagecleanupconfig
	namespace: default
	labels:
	component: imagecleanup
	data:
	# removes all images unused by a running container
	cronjobs: 0 0 * * * crictl rmi --prune 2>&1

	from requests.adapters import HTTPAdapter, Retry
	from requests import Session

	retries = Retry(
	total=5, backoff_factor=1, status_forcelist=[502, 503, 504]
	)
	session = Session() # reuse tcp connection
	session.mount("http://", HTTPAdapter(max_retries=retries))
	session.mount("https://", HTTPAdapter(max_retries=retries))

	package main

	import (
	"fmt"

	"github.com/ethereum/go-ethereum/accounts"
	"github.com/ethereum/go-ethereum/common/hexutil"
	"github.com/ethereum/go-ethereum/crypto"
	)

	package main

	import (
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"io/ioutil"
	"net/http"
	)