1.Instalar el servicio:
En la terminal escribimos:
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install apt-cacherUna vez está hecho, es el momento de empezar la configuración que se encuentra en /etc/apt-cacher/apt-cacher.conf
2. Configurando Apt-Cacher
Editamos el fichero de configuracion, ej: sudo nano /etc/apt-cacher/apt-cacher.conf. Las opciones que no se comentan es porque se recomienda dejarlas por defecto, o no son interesantes.
daemon_port:puerto por donde escucha el servicio, defecto para apt-cacher es el 3142. Recomiendo no cambiarlo.
allowed_hosts: por defecto, todos los host tienen permiso de acceder a tu repositorio cache. En mi caso, quiero permitir el acceso a mi LAN 192.168.1.0/24 y al localhost (127.0.0.1 ), por lo que cambié el valor a:
allowed_hosts=192.168.1.0/24 ya que localhost siempre tiene permiso, no es necesario añadir 127.0.0.1generate_reports: Esta opción hace que apt-cacher cree un informe sobre como de eficiente es tu cache en el uso diario. El valor por defecto es 1, si quieres deshabilitarlo deberás ponerlo a 0
logdir: hacia donde van los log, por defecto:
logdir:=/var/log/apt-cacherexpire_hours: Método de expiración de los paquetes de la cache, si prefieres la velocidad, ponle un valor > 0, que será el tiempo en horas que "vivirá" un paquete, sin que el servicio descargue uno nuevo, si esta en cero, busca otro más nuevo, si no lo hay te da el que esta en cache, en cero descargas más, pero te evitas paquetes rotos.
expire_hours=02.2. Activando apt-cacher al comienzo
Para arrancar apt-cacher necesitamos activarlo desde /etc/default/apt-cacher. Abre /etc/default/apt-cacher y configura AUTOSTART a 1:
AUTOSTART=1
Ahora reinicia apt-cacher:
sudo service apt-cacher restart
Ahora que apt-cacher arranca, es hora de actualizar el /etc/apt/sources.list de todos tus clientes para que cada host de la red use nuestro repositorio cache.
3. Configurando el sources.list de los clientes y el Servidor
Ahora es el momento de configurar el sources.list de los clientes: /etc/apt/sources.list. Es importante utilizar nuestro repositorio cache en el servidor también, ya que, cualquier actualización hecha por el servidor repercutirá en la cache.
Aquí esta el /etc/apt/sources.list original:
###### Ubuntu Main Repos
deb http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid main
###### Ubuntu Update Repos
deb http://archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid-security main
deb-src http://archive.ubuntu.com/ubuntu/ lucid-updates main
###### Ubuntu Partner Repo
deb http://archive.canonical.com/ubuntu lucid partner
Para utilizar nuestro repositorio cache, necesitamos cambiar estas entradas a:
###### Ubuntu Main Repos
deb http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid main
###### Ubuntu Update Repos
deb http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid-security main
deb-src http://127.0.0.1:3142/archive.ubuntu.com/ubuntu/ lucid-updates main
###### Ubuntu Partner Repo
deb http://127.0.0.1:3142/archive.canonical.com/ubuntu lucid partner
Nota:cambiar el 127.0.0.1, por el ip de tu servidor.el 127.0.0.1 seria para los sources.list del propio servidor.
Cada cliente debe ser capaz de descargar los paquetes .deb desde nuestro repositorio cache:
sudo apt-get updateNota: debe ser ejecutado en cada cliente.
4. Importando los paquetes desde /var/cache/apt/archives/ al repositorio apt-cacher
Puede que tu servidor ya tenga una gran cantidad de paquetes en su cache local: /var/cache/apt/archives/ (de echo las actualizaciones). apt-cacher ofrece una herramienta para importar estos archivos al repositorio de apt-cacher. Hay unos scripts muy útiles que se encuentran en /usr/share/apt-cacher/. El que nos interesa es apt-cacher-import.pl. Para importar archivos .deb desde /var/cache/apt/archives al repositorio de apt-cacher ejecuta:
sudo /usr/share/apt-cacher/apt-cacher-import.pl /var/cache/apt/archivesAhora, en el directorio /var/cache/apt-cacher/packages/ habrá unos cuantos paquetes.
5. Obteniendo el informe de uso del repositorio cache
Si dejas la opción generate_reports configurada a 1, apt-cacher generará un informe de uso diario de la cache.
Podrás acceder a él en la dirección: http://ip_servidor:3142/report. Si necesitas regenerar el informe, ejecuta:
sudo /usr/share/apt-cacher/apt-cacher-report.plAnexo: ejemplo de configuración
#################################################################
# This is the config file for apt-cacher. On most Debian systems
# you can safely leave the defaults alone.
#################################################################
# cache_dir is used to set the location of the local cache. This can
# become quite large, so make sure it is somewhere with plenty of space.
cache_dir=/home/apt-cacher
# The email address of the administrator is displayed in the info page
# and traffic reports.
admin_email=root@localhost
# For the daemon startup settings please edit the file /etc/default/apt-cacher.
# Daemon port setting, only useful in stand-alone mode. You need to run the
# daemon as root to use privileged ports (<1024).
daemon_port=3142
# optional settings, user and group to run the daemon as. Make sure they have
# sufficient permissions on the cache and log directories. Comment the settings
# to run apt-cacher as the native user.
group=www-data
user=www-data
# optional setting, binds the listening daemon to specified IP(s). Use IP
# ranges for more advanced configuration, see below.
# daemon_addr=localhost
# If your apt-cacher machine is directly exposed to the Internet and you are
# worried about unauthorised machines fetching packages through it, you can
# specify a list of IPv4 addresses which are allowed to use it and another
# list of IPv4 addresses which aren't.
# Localhost (127.0.0.1) is always allowed. Other addresses must be matched
# by allowed_hosts and not by denied_hosts to be permitted to use the cache.
# Setting allowed_hosts to "*" means "allow all".
# Otherwise the format is a comma-separated list containing addresses,
# optionally with masks (like 10.0.0.0/22), or ranges of addresses (two
# addresses separated by a hyphen, no masks, like '192.168.0.3-192.168.0.56').
allowed_hosts=*
denied_hosts=
# And similarly for IPv6 with allowed_hosts_6 and denied_hosts_6.
# Note that IPv4-mapped IPv6 addresses (::ffff:w.x.y.z) are truncated to
# w.x.y.z and are handled as IPv4.
allowed_hosts_6=fec0::/16
denied_hosts_6=
# This thing can be done by Apache but is much simpler here - limit access to
# Debian mirrors based on server names in the URLs
#allowed_locations=ftp.uni-kl.de,ftp.nerim.net,debian.tu-bs.de
# Apt-cacher can generate usage reports every 24 hours if you set this
# directive to 1. You can view the reports in a web browser by pointing
# to your cache machine with '/apt-cacher/report' on the end, like this:
# http://yourcache.example.com/apt-cacher/report
# Generating reports is very fast even with many thousands of logfile
# lines, so you can safely turn this on without creating much
# additional system load.
generate_reports=1
# Apt-cacher can clean up its cache directory every 24 hours if you set
# this directive to 1. Cleaning the cache can take some time to run
# (generally in the order of a few minutes) and removes all package
# files that are not mentioned in any existing 'Packages' lists. This
# has the effect of deleting packages that have been superseded by an
# updated 'Packages' list.
clean_cache=1
# The directory to use for apt-cacher access and error logs.
# The access log records every request in the format:
# date-time|client ip address|HIT/MISS/EXPIRED|object size|object name
# The error log is slightly more free-form, and is also used for debug
# messages if debug mode is turned on.
# Note that the old 'logfile' and 'errorfile' directives are
# deprecated: if you set them explicitly they will be honoured, but it's
# better to just get rid of them from old config files.
logdir=/var/log/apt-cacher
# apt-cacher can use different methods to decide whether package lists need to
# be updated,
# A) looking at the age of the cached files
# B) getting HTTP header from server and comparing that with cached data. This
# method is more reliable and avoids desynchronisation of data and index files
# but needs to transfer few bytes from the server every time somebody requests
# the files ("apt-get update")
# Set the following value to the maximum age (in hours) for method A or to 0
# for method B
expire_hours=0
#expire_hours=4500
# Apt-cacher can pass all its requests to an external http proxy like
# Squid, which could be very useful if you are using an ISP that blocks
# port 80 and requires all web traffic to go through its proxy. The
# format is 'hostname:port', eg: 'proxy.example.com:8080'.
#http_proxy=proxy.example.com:8080
http_proxy=10.3.0.8:8080
# Use of an external proxy can be turned on or off with this flag.
# Value should be either 0 (off) or 1 (on).
use_proxy=1
# External http proxy sometimes need authentication to get full access. The
# format is 'username:password'.
http_proxy_auth=
# This sets the interface to use for the upstream connection.
# Specify an interface name, an IP address or a host name.
# If unset, the default route is used.
#interface=
# Rate limiting sets the maximum bandwidth in bytes per second to use
# for fetching packages. Syntax is fully defined in 'man wget'.
# Use 'k' or 'm' to use kilobytes or megabytes / second: eg, 'limit=25k'.
# Use 0 or a negative value for no rate limiting.
limit=10k
# Debug mode makes apt-cacher spew a lot of extra debug junk to the
# error log (whose location is defined with the 'logdir' directive).
# Leave this off unless you need it, or your error log will get very
# big. Acceptable values are 0 or 1.
debug=0
# To enable data checksumming, install libberkeleydb-perl and set this option
# to 1. Then wait until the Packages/Sources files have been refreshed once
# (and so the database has been built up). You can also nuke them in the cache
# to trigger the update.
# checksum=1
# Print a 410 (Gone) HTTP message with the specified text when accessed via
# CGI. Useful to tell users to adapt their sources.list files when the
# apt-cacher server is being relocated (via apt-get's error messages while
# running "update")
#cgi_advise_to_use = Please use http://cacheserver:3142/ as apt-cacher access URL
#cgi_advise_to_use = Server relocated. To change sources.list, run perl -pe "s,/apt-cacher\??,:3142," -i /etc/apt/sources.list
# Server mapping - this allows to hide real server names behind virtual paths
# that appear in the access URL. This method is known from apt-proxy. This is
# also the only method to use FTP access to the target hosts. The syntax is
# simple, the part of the beginning to replace, followed by a list of mirror
# urls, all space separated. Multiple profile are separated by semicolons
# Note that you need to specify all target servers in the allowed_locations
# options if you make use of it. Also note that the paths should not overlap
# each other. FTP access method not supported yet, maybe in the future.
# path_map = debian ftp.uni-kl.de/pub/linux/debian ftp2.de.debian.org/debian ; ubuntu archive.ubuntu.com/ubuntu ; security security.debian.org/debian-security ftp2.de.debian.org/debian-security
# Permitted package files - this is a perl regular expression which matches all
# package-type files (files that are uniquely identified by their filename).
# The default is:
#package_files_regexp = (?:\.deb|\.rpm|\.dsc|\.tar\.gz|\.diff\.gz|\.udeb|index\.db-.+\.gz|\.jigdo|\.template)
# Permitted Index files - this is the perl regular expression which matches all
# index-type files (files that are uniquely identified by their full path and
# need to be checked for freshness).
#The default is:
#index_files_regexp = (?:Index|Packages\.gz|Packages\.bz2|Release|Release\.gpg|Sources\.gz|Sources\.bz2|Contents-.+\.gz|pkglist.*\.bz2|release|release\..*|srclist.*\.bz2|Translation-.+\.bz2)
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