opencloud/docs/content/getting-started.md

title, date, anchor, weight

title	date	anchor	weight
Getting Started	2018-05-02T00:00:00+00:00	getting-started	20

Installation

So far we are offering two different variants for the installation. You can choose between Docker or pre-built binaries which are stored on our download mirrors and GitHub releases. Maybe we will also provide system packages for the major distributions later if we see the need for it.

Docker

TBD

Binaries

TBD

Runtime

Included with the ocis binary is embedded a go-micro runtime that is in charge of starting services as a fork of the master process. This provides complete control over the services. Ocis extensions can be added as part of this runtime.

./bin/ocis micro

This will currently boot:

go.micro
go.micro.api
go.micro.bot
go.micro.broker
go.micro.debug
go.micro.http.broker
go.micro.monitor
go.micro.network
go.micro.proxy
go.micro.registry
go.micro.router
go.micro.runtime
go.micro.store
go.micro.tunnel
go.micro.web

Further ocis extensions can be added to the runtime via the ocis command like:

./bin/ocis hello

Which whill register:

go.micro.web.hello
go.micro.api.hello

To the list of available services.

Configuration

We provide overall three different variants of configuration. The variant based on environment variables and commandline flags are split up into global values and command-specific values.

Envrionment variables

If you prefer to configure the service with environment variables you can see the available variables below.

Global

OCIS_LOG_LEVEL

Set logging level, defaults to info

OCIS_LOG_COLOR

Enable colored logging, defaults to true

OCIS_LOG_PRETTY

Enable pretty logging, defaults to true

Server

OCIS_DEBUG_ADDR

Address to bind debug server, defaults to 0.0.0.0:9010

OCIS_DEBUG_TOKEN

Token to grant metrics access, empty default value

OCIS_DEBUG_PPROF

Enable pprof debugging, defaults to false

OCIS_HTTP_ADDR

Address to bind http server, defaults to 0.0.0.0:9000

OCIS_HTTP_ROOT

Root path for http endpoint, defaults to /

OCIS_GRPC_ADDR

Address to bind grpc server, defaults to 0.0.0.0:9001

OCIS_SERVICES_ENABLED

List of enabled services, defaults to phoenix,konnectd,graph,ocs,webdav,hello

Health

OCIS_DEBUG_ADDR

Address to debug endpoint, defaults to 0.0.0.0:9010

Commandline flags

If you prefer to configure the service with commandline flags you can see the available variables below.

Global

--log-level

Set logging level, defaults to info

--log-color

Enable colored logging, defaults to true

--log-pretty

Enable pretty logging, defaults to true

Server

--debug-addr

Address to bind debug server, defaults to 0.0.0.0:9010

--debug-token

Token to grant metrics access, empty default value

--debug-pprof

Enable pprof debugging, defaults to false

--http-addr

Address to bind http server, defaults to 0.0.0.0:9000

--http-root

Root path for http endpoint, defaults to /

--grpc-addr

Address to bind grpc server, defaults to 0.0.0.0:9001

--services-enabled

List of enabled services, defaults to phoenix,konnectd,graph,ocs,webdav,hello

Health

--debug-addr

Address to debug endpoint, defaults to 0.0.0.0:9010

Configuration file

So far we support the file formats JSON and YAML, if you want to get a full example configuration just take a look at our repository, there you can always see the latest configuration format. These example configurations include all available options and the default values. The configuration file will be automatically loaded if it's placed at /etc/ocis/ocis.yml, ${HOME}/.ocis/ocis.yml or $(pwd)/config/ocis.yml.

Usage

The program provides a few sub-commands on execution. The available configuration methods have already been mentioned above. Generally you can always see a formated help output if you execute the binary via ocis --help.

Server

The server command is used to start the http and debug server on two addresses within a single process. The http server is serving the general webservice while the debug server is used for health check, readiness check and to server the metrics mentioned below. For further help please execute:

{{< highlight txt >}} ocis server --help {{< / highlight >}}

Health

The health command is used to execute a health check, if the exit code equals zero the service should be up and running, if the exist code is greater than zero the service is not in a healthy state. Generally this command is used within our Docker containers, it could also be used within Kubernetes.

{{< highlight txt >}} ocis health --help {{< / highlight >}}

Metrics

This service provides some Prometheus metrics through the debug endpoint, you can optionally secure the metrics endpoint by some random token, which got to be configured through one of the flag --debug-token or the environment variable OCIS_DEBUG_TOKEN mentioned above. By default the metrics endpoint is bound to http://0.0.0.0:8001/metrics.

go_gc_duration_seconds

A summary of the GC invocation durations

go_gc_duration_seconds_sum

A summary of the GC invocation durations

go_gc_duration_seconds_count

A summary of the GC invocation durations

go_goroutines

Number of goroutines that currently exist

go_info

Information about the Go environment

go_memstats_alloc_bytes

Number of bytes allocated and still in use

go_memstats_alloc_bytes_total

Total number of bytes allocated, even if freed

go_memstats_buck_hash_sys_bytes

Number of bytes used by the profiling bucket hash table

go_memstats_frees_total

Total number of frees

go_memstats_gc_cpu_fraction

The fraction of this program's available CPU time used by the GC since the program started

go_memstats_gc_sys_bytes

Number of bytes used for garbage collection system metadata

go_memstats_heap_alloc_bytes

Number of heap bytes allocated and still in use

go_memstats_heap_idle_bytes

Number of heap bytes waiting to be used

go_memstats_heap_inuse_bytes

Number of heap bytes that are in use

go_memstats_heap_objects

Number of allocated objects

go_memstats_heap_released_bytes

Number of heap bytes released to OS

go_memstats_heap_sys_bytes

Number of heap bytes obtained from system

go_memstats_last_gc_time_seconds

Number of seconds since 1970 of last garbage collection

go_memstats_lookups_total

Total number of pointer lookups

go_memstats_mallocs_total

Total number of mallocs

go_memstats_mcache_inuse_bytes

Number of bytes in use by mcache structures

go_memstats_mcache_sys_bytes

Number of bytes used for mcache structures obtained from system

go_memstats_mspan_inuse_bytes

Number of bytes in use by mspan structures

go_memstats_mspan_sys_bytes

Number of bytes used for mspan structures obtained from system

go_memstats_next_gc_bytes

Number of heap bytes when next garbage collection will take place

go_memstats_other_sys_bytes

Number of bytes used for other system allocations

go_memstats_stack_inuse_bytes

Number of bytes in use by the stack allocator

go_memstats_stack_sys_bytes

Number of bytes obtained from system for stack allocator

go_memstats_sys_bytes

Number of bytes obtained from system

go_threads

Number of OS threads created

promhttp_metric_handler_requests_in_flight

Current number of scrapes being served

promhttp_metric_handler_requests_total

Total number of scrapes by HTTP status code