jsierles

Requests are distributed according to the servers in round-robin manner with respect of the server weight.
For example of every seven requests given above they will be distributed like this: 5 requests on backend1.example.com and one request to the second and the third of server. If with an attempt at the work with the server error occurred, then the request will be transmitted to the following server and then until all workers of server not are tested. If successful answer is not succeeded in obtaining from all servers, then to client will be returned the result of work with the last server.

Nginx distributes requests round-robin, factoring in the server weight value.

For example, for a total of 7 requests, the distribution is: 5 requests to backend1.example.com, and one request each to the other two servers. If the server returns an error, nginx will retry the request on the next server in the list. Should all servers return errors, the client receives the response from the last server.

jsierles

ssh -vvv \ 
-o PasswordAuthentication=yes \ 
-o ChallengeResponseAuthentication=no \ 
-o GSSAPIAuthentication=no \ 
-o HostbasedAuthentication=no \ 
-o PubkeyAuthentication=no \ 
-o RSAAuthentication=no \ 
-o Compression=no \ 
-o ForwardAgent=no \ 
-o ForwardX11=no \ 

jsierles

Internal Server Error

The server encountered an error while processing this request:
[{webmachine_util,media_type_match,2,
                  [{file,"src/webmachine_util.erl"},{line,174}]},
 {webmachine_util,'-media_match/2-lc$^0/1-0-',3,
                  [{file,"src/webmachine_util.erl"},{line,163}]},
 {webmachine_util,choose_media_type1,2,
                  [{file,"src/webmachine_util.erl"},{line,154}]},
 {webmachine_decision_core,decision,1,

jsierles

net.core.somaxconn = 32768
net.ipv4.conf.all.send_redirects = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_max_tw_buckets = 262144
net.ipv4.tcp_mem = 200000    280000    300000

jsierles

# max number of TCP SYN requests allowed per call to listen()
net.core.somaxconn = 32768

# allow listening on virtual IPs
net.ipv4.ip_nonlocal_bind = 1

# these values are documented in the 'tcp' man page: http://man7.org/linux/man-pages/man7/tcp.7.html
# see also http://kaivanov.blogspot.com.es/2010/09/linux-tcp-tuning.html

# number of seconds idle on a connection before sending a TCP keepalive probe

jsierles

ROM cenx/centos:6.5

RUN rpm -i http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-centos93-9.3-1.noarch.rpm

RUN yum install -y postgresql93-server postgresql93-contrib

RUN mkdir /var/run/postgresql

RUN chown postgres:postgres /var/run/postgresql

jsierles

[root@vagrant-centos65 database]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
cenx/postgresql     9.3.4-0             56fa1e4ae460        About an hour ago   660 MB
cenx/centos         6.5                 56019f161f24        About an hour ago   487 MB
tianon/centos       6.5                 89b52f216c6c        3 months ago        149.3 MB
[root@vagrant-centos65 database]# docker run tianon/centos
Unable to find image 'tianon/centos' locally
Pulling repository tianon/centos
0252ee3ea03b: Error pulling image (5.10) from tianon/centos, Driver devicemapper failed to create image rootfs 0252ee3ea03ba08da8d7fa9c92ae9826a4926f62d7aaaaa2b8c867f8e56449ac: device 0252ee3ea03ba08da8d7fa3086a074c4b6: Error pulling image (6.2) from tianon/centos, Driver devicemapper failed to create image rootfs 3086a074c4b644a0d649d4e554e25c178001ac58aef597def20c102f563a96e5: device 3086a074c4b644a0d649d4e554e25c178001ac58aef597def20c102f563a96e5 already exists 8001ac58aef597

jsierles

/Users/joshua/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/docker-api-1.11.0/lib/docker/util.rb:11:in `rescue in parse_json': 757: unexpected token at '{"ID":"a4fa4caa15c3c1e9f856db0c2a9bb1adcc1f5121e53220f4b6adaa74d19a13a2","Created":"2014-06-03T11:47:11.911564454Z","Path":"/bin/sh","Args":["-c","/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg"],"Config":{"Hostname":"frontend","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":{"443/tcp":{},"80/tcp":{}},"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg"],"Image":"myercer.localnet/frontend","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":null},"State":{"Running":false,"Pid":0,"ExitCode":0,"StartedAt":"0001-01-01T00:00:00Z","FinishedAt":"0001-01-01T00:00:00Z"},"Image":"

jsierles

#!/bin/bash

{{range $key, $value := .}}
{{ with $address := index $value.Addresses 0 }}
# {{ $value.Name }}
curl -L http://127.0.0.1:4001/v2/keys/backends/{{ $value.Image.Repository}}/{{printf "%.*s" 12 $value.ID}} -XPUT -d value="{{ $address.IP }}:{{ $address.Port }}" -d ttl=15
{{ end }}
{{end}}

2014/06/03 10:36:55 template error: template: etcd.tmpl:4:20: executing "etcd.tmpl" at <index $value.Address...>: error calling index: index out of range: 0

jsierles

#!/bin/bash -x

HOSTNAME=$HOSTNAME

# umount
umount /dev/md*

# Stop raid devices
mdadm --stop /dev/md*
# Zero 'em all