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(CloudI 2.0.1
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ABOUT
What is CloudI?
(short answer) "A distributed application server that provides efficient
messaging for many programming languages within a single service abstraction
that is both scalable and fault-tolerant."
(shorter answer) "A rock-solid transaction processing system for flexible
software development."
(shortest answer) "A Cloud at the lowest level."
Who would use CloudI?
Software developers that do not want to get locked into corporate vendors
or frameworks that push for perpetual commercial support or licenses.
Why should CloudI be used?
CloudI makes software fault-tolerant and scalable, utilizing Erlang,
even if the software is legacy source code. CloudI mitigates
software development risk (delays or failures) when making
software scale in non-Erlang programming languages, or during a conversion
of a software system (fully or partially) to the Erlang programming language.
How should CloudI be used?
The CloudI API provides a simple set of functions for
Service-Oriented Architecture (SOA) development in any supported language
(currently C/C++, Go, Haskell, Java, JavaScript, OCaml, Perl, PHP, Python,
Ruby, and Erlang/Elixir):
subscribe,unsubscribe,subscribe_countsend_async,send_sync,mcast_async(mcast_async== publish)recv_asyncreturn,forward
External communication that needs to scale (beyond 10,000 connections)
can use an existing internal CloudI service (implemented in Erlang or Elixir)
which may do processing for one or more external CloudI services
(implemented in C/C++, Go, Haskell, Java, JavaScript, OCaml, Perl, PHP, Python,
and/or Ruby)
Even if external communication doesn't need to scale, private cloud
computing tasks (number crunching) can gain fault-tolerance and internal
system scalability within CloudI.
Where should I find more information?
Please see the FAQ for more details.
INSTALLATION
Requirements
Erlang >= 21.0 (erlang /Ubuntu)C++ (g++ /Ubuntu)boost >= 1.36.0 (libboost-system-dev libboost-thread-dev libboost-dev /Ubuntu)
Optional (default="yes"):
Java >= 1.5 JDK(default-jdk /Ubuntu)- Use the "--enable-java-support=no" configure flag to disable
JavaScript >= 0.12.18(nodejs /Ubuntu)- Use the "--enable-javascript-support=no" configure flag to disable
Perl >= 5.10 (with Compress::Zlib)(perl perl-modules /Ubuntu)- Use the "--enable-perl-support=no" configure flag to disable
PHP >= 7.0(php /Ubuntu)- Use the "--enable-php-support=no" configure flag to disable
Python >= 2.7.0(python3 python3-dev /Ubuntu)- Use the "--enable-python-support=no" and "--enable-python-c-support=no" configure flag to disable
Ruby >= 1.9.0(ruby /Ubuntu)- Use the "--enable-ruby-support=no" configure flag to disable
GNU MP library(libgmp-dev /Ubuntu)- Used in the hexpi (C++) integration test only
("--with-integration-tests=no" configure flag to disable)
Optional (default="no"):
ATS2/Postiats(ats2-lang /Ubuntu)- Use the "--enable-ats2-support" configure flag to enable
Go >= 1.11(golang /Ubuntu)- Use the "--enable-go-support" configure flag to enable
Haskell (GHC >= 7.10.3 and cabal-install >= 1.22)(ghc cabal-install zlib1g-dev /Ubuntu)- Use the "--enable-haskell-support" configure flag to enable
OCaml >= 4.03.0(ocaml /Ubuntu)- Use the "--enable-ocaml-support" configure flag to enable
Building
For configuration options, see FAQ: 3.2 - Installation Options.
cd src
./configure
make
sudo make install
Running
Within the installation directory the cloudi script controls CloudI.
To start CloudI:
sudo cloudi start
To stop CloudI:
sudo cloudi stop
INTEGRATION
See the Quick Start Guide or the API documentation
Integration points:
- CloudI API (See
src/api/README.markdown) - HTTP with
cloudi_service_http_cowboyandcloudi_service_http_elli - OAuth v1 with
cloudi_service_oauth1 - TCP with
cloudi_service_tcp - UDP with
cloudi_service_udp - SQL Databases
- MySQL with
cloudi_service_db_mysql - PostgreSQL with
cloudi_service_db_pgsql
- MySQL with
- shell with
cloudi_service_shell
Dynamic Configuration and Monitoring:
- CloudI Service API (See
src/service_api/README.markdown) - Batch CloudI Service Execution with
cloudi_service_api_batch - Monitoring to Graphite, OpenTSDB, SNMP, InfluxDB or StatsD with
cloudi_service_monitoring
Routing:
- Caching Static File Data with
cloudi_service_filesystem - HTTP Client Requests with
cloudi_service_http_client - HTTP REST Handlers with
cloudi_service_http_rest - Fault-Tolerant Map-Reduce with
cloudi_service_map_reduce(See thehexpiintegration test controller) - Durable Service Requests with
cloudi_service_queue - Service Redundancy with
cloudi_service_quorum - Service Request Redundancy with
cloudi_service_funnel - Schedule Service Requests with
cloudi_service_cron - Local/Remote(SSH) Request Routing with
cloudi_service_router - Validation with
cloudi_service_validate
Maintained Services Excluded from this Repository:
- HtmlUnit with
cloudi_service_htmlunit
Unmaintained Services Excluded from this Repository:
- elasticsearch with
cloudi_service_db_elasticsearch - Cassandra with
cloudi_service_db_cassandraorcloudi_service_db_cassandra_cql - CouchDB with
cloudi_service_db_couchdb - memcached with
cloudi_service_db_memcached - Riak with
cloudi_service_db_riak - TokyoTyrant with
cloudi_service_db_tokyotyrant - ZeroMQ with
cloudi_service_zeromq
The default CloudI configuration can run the included integration tests
if all the supported programming languages are enabled at configure time
(they are by default) and the --with-integration-tests-ran configuration
argument is used (to choose the src/cloudi_tests.conf.in file).
If the --with-integration-tests-ran configuration argument is not used,
the more minimal CloudI configuration will be used instead
(in the src/cloudi_minimal.conf.in file) to support basic things like the
Quick Start Guide,
the Dashboard
and any tutorials or examples.
CONTACT
Michael Truog (mjtruog at protonmail dot com)