It may have nothing to do with your reverse proxy.  There have been a 
couple of posts today saying that the 2.0 GA doesn't work with SSL, reverse 
proxy, multiple interfaces, etc.  I'm starting to think that the 2.0 GA 
release simply doesn't work.  You may want to try to setup a vanilla 
installation to see if you can get that working, even without the reverse 
proxy.

On Wednesday, April 27, 2016 at 5:26:54 PM UTC-7, [email protected] wrote:
>
> Hi I have issues with graylog 2.0 GA release, cant get reverse proxy 
> working, i tried on ubuntu 14,04 rhel 6 and 7, always same error 
>
> my setup:
> mongo 3.2
> elastisearch 2.3.2
> graylog 2.0 GA
> nginx 1.9.5
>
> When im trying to access remote machine (same network), im getting this 
> error in browser
> If I access localhost directly on graylog machine it is working
>
> 
>>
>>> Server currently unavailable
>>>>
>>>> We are experiencing problems connecting to the Graylog server running 
>>>> on http://127.0.0.1:12900//. Please verify that the server is healthy 
>>>> and working correctly.
>>>>
>>>> You will be automatically redirected to the previous page once we can 
>>>> connect to the server.
>>>>
>>>> Do you need a hand? We can help you.
>>>> Less details
>>>>
>>>> This is the last response we received from the server:
>>>>
>>>> Error message
>>>>     Bad request
>>>> Original Request
>>>>     GET http://127.0.0.1:12900/system/cluster/node
>>>> Status code
>>>>     undefined
>>>> Full error message
>>>>     Error: Request has been terminated
>>>>     Possible causes: the network is offline, Origin is not allowed by 
>>>> Access-Control-Allow-Origin, the page is being unloaded, etc.
>>>>
>>>
> *My Nginx configuration:*
>
> user  nginx;
>> worker_processes  1;
>>
>> error_log  /var/log/nginx/error.log warn;
>> pid        /var/run/nginx.pid;
>>
>>
>> events {
>>     worker_connections  1024;
>> }
>>
>>
>> http {
>>     include       /etc/nginx/mime.types;
>>     default_type  application/octet-stream;
>>
>>     log_format  main  '$remote_addr - $remote_user [$time_local] 
>> "$request" '
>>                       '$status $body_bytes_sent "$http_referer" '
>>                       '"$http_user_agent" "$http_x_forwarded_for"';
>>
>>     access_log  /var/log/nginx/access.log  main;
>>
>>     sendfile        on;
>>     #tcp_nopush     on;
>>
>>     keepalive_timeout  65;
>>
>>     #gzip  on;
>>
>>     #include /etc/nginx/conf.d/*.conf;
>>
>>     server {
>>       listen 80;
>>       location / {
>>         proxy_pass http://localhost:9000/;
>>         proxy_http_version 1.1;
>>         proxy_set_header Host $host;
>>         proxy_set_header X-Real-IP $remote_addr;
>>         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
>>         proxy_pass_request_headers on;
>>         proxy_connect_timeout 150;
>>         proxy_send_timeout 100;
>>         proxy_read_timeout 100;
>>         proxy_buffers 4 32k;
>>         client_max_body_size 8m;
>>         client_body_buffer_size 128k;
>>       }
>>     }
>>
>> }
>>
>  
> *graylog configuration file, i changed just field marked with red*
>
> # If you are running more than one instances of Graylog server you have to 
> select one of these
> # instances as master. The master will perform some periodical tasks that 
> non-masters won't perform.
> is_master = true
>
> # The auto-generated node ID will be stored in this file and read after 
> restarts. It is a good idea
> # to use an absolute file path here if you are starting Graylog server 
> from init scripts or similar.
> node_id_file = /etc/graylog/server/node-id
>
> # You MUST set a secret to secure/pepper the stored user passwords here. 
> Use at least 64 characters.
> # Generate one by using for example: pwgen -N 1 -s 96
> *password_secret = xxxxxxxxxx*
>
> # The default root user is named 'admin'
> #root_username = admin
>
> # You MUST specify a hash password for the root user (which you only need 
> to initially set up the
> # system and in case you lose connectivity to your authentication backend)
> # This password cannot be changed using the API or via the web interface. 
> If you need to change it,
> # modify it in this file.
> # Create one by using for example: echo -n yourpassword | shasum -a 256
> # and put the resulting hash value into the following line
> *root_password_sha2 = xxxxxxxxxx*
>
> # The email address of the root user.
> # Default is empty
> #root_email = ""
>
> # The time zone setting of the root user. See 
> http://www.joda.org/joda-time/timezones.html for a list of valid time 
> zones.
> # Default is UTC
> #root_timezone = UTC
>
> # Set plugin directory here (relative or absolute)
> plugin_dir = /usr/share/graylog-server/plugin
>
> # REST API listen URI. Must be reachable by other Graylog server nodes if 
> you run a cluster.
> # When using Graylog Collectors, this URI will be used to receive 
> heartbeat messages and must be accessible for all collectors.
> rest_listen_uri = http://127.0.0.1:12900/
>
> # REST API transport address. Defaults to the value of rest_listen_uri. 
> Exception: If rest_listen_uri
> # is set to a wildcard IP address (0.0.0.0) the first non-loopback IPv4 
> system address is used.
> # If set, this will be promoted in the cluster discovery APIs, so other 
> nodes may try to connect on
> # this address and it is used to generate URLs addressing entities in the 
> REST API. (see rest_listen_uri)
> # You will need to define this, if your Graylog server is running behind a 
> HTTP proxy that is rewriting
> # the scheme, host name or URI.
> #rest_transport_uri = http://192.168.1.1:12900/
>
> # Enable CORS headers for REST API. This is necessary for JS-clients 
> accessing the server directly.
> # If these are disabled, modern browsers will not be able to retrieve 
> resources from the server.
> # This is enabled by default. Uncomment the next line to disable it.
> #rest_enable_cors = false
>
> # Enable GZIP support for REST API. This compresses API responses and 
> therefore helps to reduce
> # overall round trip times. This is disabled by default. Uncomment the 
> next line to enable it.
> #rest_enable_gzip = true
>
> # Enable HTTPS support for the REST API. This secures the communication 
> with the REST API with
> # TLS to prevent request forgery and eavesdropping. This is disabled by 
> default. Uncomment the
> # next line to enable it.
> #rest_enable_tls = true
>
> # The X.509 certificate chain file in PEM format to use for securing the 
> REST API.
> #rest_tls_cert_file = /path/to/graylog.crt
>
> # The PKCS#8 private key file in PEM format to use for securing the REST 
> API.
> #rest_tls_key_file = /path/to/graylog.key
>
> # The password to unlock the private key used for securing the REST API.
> #rest_tls_key_password = secret
>
> # The maximum size of the HTTP request headers in bytes.
> #rest_max_header_size = 8192
>
> # The maximal length of the initial HTTP/1.1 line in bytes.
> #rest_max_initial_line_length = 4096
>
> # The size of the thread pool used exclusively for serving the REST API.
> #rest_thread_pool_size = 16
>
> # Enable the embedded Graylog web interface.
> # Default: true
> #web_enable = false
>
> # Web interface listen URI
> #web_listen_uri = http://127.0.0.1:9000/
>
> # Web interface endpoint URI. This setting can be overriden on a 
> per-request basis with the X-Graylog-Server-URL header.
> # Default: $rest_transport_uri
> #web_endpoint_uri =
>
> # Enable CORS headers for the web interface. This is necessary for 
> JS-clients accessing the server directly.
> # If these are disabled, modern browsers will not be able to retrieve 
> resources from the server.
> #web_enable_cors = false
>
> # Enable/disable GZIP support for the web interface. This compresses HTTP 
> responses and therefore helps to reduce
> # overall round trip times. This is enabled by default. Uncomment the next 
> line to disable it.
> #web_enable_gzip = false
>
> # Enable HTTPS support for the web interface. This secures the 
> communication of the web browser with the web interface
> # using TLS to prevent request forgery and eavesdropping.
> # This is disabled by default. Uncomment the next line to enable it and 
> see the other related configuration settings.
> #web_enable_tls = true
>
> # The X.509 certificate chain file in PEM format to use for securing the 
> web interface.
> #web_tls_cert_file = /path/to/graylog-web.crt
>
> # The PKCS#8 private key file in PEM format to use for securing the web 
> interface.
> #web_tls_key_file = /path/to/graylog-web.key
>
> # The password to unlock the private key used for securing the web 
> interface.
> #web_tls_key_password = secret
>
> # The maximum size of the HTTP request headers in bytes.
> #web_max_header_size = 8192
>
> # The maximal length of the initial HTTP/1.1 line in bytes.
> #web_max_initial_line_length = 4096
>
> # The size of the thread pool used exclusively for serving the web 
> interface.
> #web_thread_pool_size = 16
>
> # Configuration file for the embedded Elasticsearch instance in Graylog.
> # Pay attention to the working directory of the server, maybe use an 
> absolute path here.
> # Default: empty
> #elasticsearch_config_file = /etc/graylog/server/elasticsearch.yml
>
> # Disable checking the version of Elasticsearch for being compatible with 
> this Graylog release.
> # WARNING: Using Graylog with unsupported and untested versions of 
> Elasticsearch may lead to data loss!
> #elasticsearch_disable_version_check = true
>
> # Disable message retention on this node, i. e. disable Elasticsearch 
> index rotation.
> #no_retention = false
>
> # How many Elasticsearch shards and replicas should be used per index? 
> Note that this only applies to newly created indices.
> *elasticsearch_shards = 1*
> elasticsearch_replicas = 0
>
> # Prefix for all Elasticsearch indices and index aliases managed by 
> Graylog.
> elasticsearch_index_prefix = graylog
>
> # Name of the Elasticsearch index template used by Graylog to apply the 
> mandatory index mapping.
> # # Default: graylog-internal
> #elasticsearch_template_name = graylog-internal
>
> # Do you want to allow searches with leading wildcards? This can be 
> extremely resource hungry and should only
> # be enabled with care. See also: 
> https://www.graylog.org/documentation/general/queries/
> allow_leading_wildcard_searches = false
>
> # Do you want to allow searches to be highlighted? Depending on the size 
> of your messages this can be memory hungry and
> # should only be enabled after making sure your Elasticsearch cluster has 
> enough memory.
> allow_highlighting = false
>
> # settings to be passed to elasticsearch's client (overriding those in the 
> provided elasticsearch_config_file)
> # all these
> # this must be the same as for your Elasticsearch cluster
> #elasticsearch_cluster_name = graylog
>
> # The prefix being used to generate the Elasticsearch node name which 
> makes it easier to identify the specific Graylog
> # server running the embedded Elasticsearch instance. The node name will 
> be constructed by concatenating this prefix
> # and the Graylog node ID (see node_id_file), for example 
> "graylog-17052010-1234-5678-abcd-1337cafebabe".
> # Default: graylog-
> #elasticsearch_node_name_prefix = graylog-
>
> # A comma-separated list of Elasticsearch nodes which Graylog is using to 
> connect to the Elasticsearch cluster,
> # see 
> https://www.elastic.co/guide/en/elasticsearch/reference/2.3/modules-discovery-zen.html
>  
> for details.
> # Default: 127.0.0.1
> #elasticsearch_discovery_zen_ping_unicast_hosts = 127.0.0.1:9300, 
> 127.0.0.2:9500
>
> # we don't want the Graylog server to store any data, or be master node
> #elasticsearch_node_master = false
> #elasticsearch_node_data = false
>
> # use a different port if you run multiple Elasticsearch nodes on one 
> machine
> #elasticsearch_transport_tcp_port = 9350
>
> # we don't need to run the embedded HTTP server here
> #elasticsearch_http_enabled = false
>
> # Enable Elasticsearch multicast discovery. This requires the installation 
> of an Elasticsearch plugin,
> # see 
> https://www.elastic.co/guide/en/elasticsearch/plugins/2.3/discovery-multicast.html
>  
> for details.
> # Default: false
> #elasticsearch_discovery_zen_ping_multicast_enabled = false
>
> # Change the following setting if you are running into problems with 
> timeouts during Elasticsearch cluster discovery.
> # The setting is specified in milliseconds, the default is 5000ms (5 
> seconds).
> #elasticsearch_cluster_discovery_timeout = 5000
>
> # the following settings allow to change the bind addresses for the 
> Elasticsearch client in Graylog
> # these settings are empty by default, letting Elasticsearch choose 
> automatically,
> # override them here or in the 'elasticsearch_config_file' if you need to 
> bind to a special address
> # refer to 
> http://www.elasticsearch.org/guide/en/elasticsearch/reference/0.90/modules-network.html
> # for special values here
> #elasticsearch_network_host =
> #elasticsearch_network_bind_host =
> #elasticsearch_network_publish_host =
>
> # The total amount of time discovery will look for other Elasticsearch 
> nodes in the cluster
> # before giving up and declaring the current node master.
> #elasticsearch_discovery_initial_state_timeout = 3s
>
> # Analyzer (tokenizer) to use for message and full_message field. The 
> "standard" filter usually is a good idea.
> # All supported analyzers are: standard, simple, whitespace, stop, 
> keyword, pattern, language, snowball, custom
> # Elasticsearch documentation: 
> http://www.elasticsearch.org/guide/reference/index-modules/analysis/
> # Note that this setting only takes effect on newly created indices.
> elasticsearch_analyzer = standard
>
> # Global request timeout for Elasticsearch requests (e. g. during search, 
> index creation, or index time-range
> # calculations) based on a best-effort to restrict the runtime of 
> Elasticsearch operations.
> # Default: 1m
> #elasticsearch_request_timeout = 1m
>
> # Time interval for index range information cleanups. This setting defines 
> how often stale index range information
> # is being purged from the database.
> # Default: 1h
> #index_ranges_cleanup_interval = 1h
>
> # Batch size for the Elasticsearch output. This is the maximum (!) number 
> of messages the Elasticsearch output
> # module will get at once and write to Elasticsearch in a batch call. If 
> the configured batch size has not been
> # reached within output_flush_interval seconds, everything that is 
> available will be flushed at once. Remember
> # that every outputbuffer processor manages its own batch and performs its 
> own batch write calls.
> # ("outputbuffer_processors" variable)
> output_batch_size = 500
>
> # Flush interval (in seconds) for the Elasticsearch output. This is the 
> maximum amount of time between two
> # batches of messages written to Elasticsearch. It is only effective at 
> all if your minimum number of messages
> # for this time period is less than output_batch_size * 
> outputbuffer_processors.
> output_flush_interval = 1
>
> # As stream outputs are loaded only on demand, an output which is failing 
> to initialize will be tried over and
> # over again. To prevent this, the following configuration options define 
> after how many faults an output will
> # not be tried again for an also configurable amount of seconds.
> output_fault_count_threshold = 5
> output_fault_penalty_seconds = 30
>
> # The number of parallel running processors.
> # Raise this number if your buffers are filling up.
> processbuffer_processors = 5
> outputbuffer_processors = 3
>
> #outputbuffer_processor_keep_alive_time = 5000
> #outputbuffer_processor_threads_core_pool_size = 3
> #outputbuffer_processor_threads_max_pool_size = 30
>
> # UDP receive buffer size for all message inputs (e. g. SyslogUDPInput).
> #udp_recvbuffer_sizes = 1048576
>
> # Wait strategy describing how buffer processors wait on a cursor 
> sequence. (default: sleeping)
> # Possible types:
> #  - yielding
> #     Compromise between performance and CPU usage.
> #  - sleeping
> #     Compromise between performance and CPU usage. Latency spikes can 
> occur after quiet periods.
> #  - blocking
> #     High throughput, low latency, higher CPU usage.
> #  - busy_spinning
> #     Avoids syscalls which could introduce latency jitter. Best when 
> threads can be bound to specific CPU cores.
> processor_wait_strategy = blocking
>
> # Size of internal ring buffers. Raise this if raising 
> outputbuffer_processors does not help anymore.
> # For optimum performance your LogMessage objects in the ring buffer 
> should fit in your CPU L3 cache.
> # Must be a power of 2. (512, 1024, 2048, ...)
> ring_size = 65536
>
> inputbuffer_ring_size = 65536
> inputbuffer_processors = 2
> inputbuffer_wait_strategy = blocking
>
> # Enable the disk based message journal.
> message_journal_enabled = true
>
> # The directory which will be used to store the message journal. The 
> directory must me exclusively used by Graylog and
> # must not contain any other files than the ones created by Graylog itself.
> message_journal_dir = /var/lib/graylog-server/journal
>
> # Journal hold messages before they could be written to Elasticsearch.
> # For a maximum of 12 hours or 5 GB whichever happens first.
> # During normal operation the journal will be smaller.
> #message_journal_max_age = 12h
> #message_journal_max_size = 5gb
>
> #message_journal_flush_age = 1m
> #message_journal_flush_interval = 1000000
> #message_journal_segment_age = 1h
> #message_journal_segment_size = 100mb
>
> # Number of threads used exclusively for dispatching internal events. 
> Default is 2.
> #async_eventbus_processors = 2
>
> # How many seconds to wait between marking node as DEAD for possible load 
> balancers and starting the actual
> # shutdown process. Set to 0 if you have no status checking load balancers 
> in front.
> lb_recognition_period_seconds = 3
>
> # Every message is matched against the configured streams and it can 
> happen that a stream contains rules which
> # take an unusual amount of time to run, for example if its using regular 
> expressions that perform excessive backtracking.
> # This will impact the processing of the entire server. To keep such 
> misbehaving stream rules from impacting other
> # streams, Graylog limits the execution time for each stream.
> # The default values are noted below, the timeout is in milliseconds.
> # If the stream matching for one stream took longer than the timeout 
> value, and this happened more than "max_faults" times
> # that stream is disabled and a notification is shown in the web interface.
> #stream_processing_timeout = 2000
> #stream_processing_max_faults = 3
>
> # Length of the interval in seconds in which the alert conditions for all 
> streams should be checked
> # and alarms are being sent.
> #alert_check_interval = 60
>
> # Since 0.21 the Graylog server supports pluggable output modules. This 
> means a single message can be written to multiple
> # outputs. The next setting defines the timeout for a single output 
> module, including the default output module where all
> # messages end up.
> #
> # Time in milliseconds to wait for all message outputs to finish writing a 
> single message.
> #output_module_timeout = 10000
>
> # Time in milliseconds after which a detected stale master node is being 
> rechecked on startup.
> #stale_master_timeout = 2000
>
> # Time in milliseconds which Graylog is waiting for all threads to stop on 
> shutdown.
> #shutdown_timeout = 30000
>
> # MongoDB connection string
> # See http://docs.mongodb.org/manual/reference/connection-string/ for 
> details
> mongodb_uri = mongodb://localhost/graylog
>
> # Authenticate against the MongoDB server
> #mongodb_uri = mongodb://grayloguser:secret@localhost:27017/graylog
>
> # Use a replica set instead of a single host
> #mongodb_uri = 
> mongodb://grayloguser:secret@localhost:27017,localhost:27018,localhost:27019/graylog
>
> # Increase this value according to the maximum connections your MongoDB 
> server can handle from a single client
> # if you encounter MongoDB connection problems.
> mongodb_max_connections = 1000
>
> # Number of threads allowed to be blocked by MongoDB connections 
> multiplier. Default: 5
> # If mongodb_max_connections is 100, and 
> mongodb_threads_allowed_to_block_multiplier is 5,
> # then 500 threads can block. More than that and an exception will be 
> thrown.
> # 
> http://api.mongodb.org/java/current/com/mongodb/MongoOptions.html#threadsAllowedToBlockForConnectionMultiplier
> mongodb_threads_allowed_to_block_multiplier = 5
>
> # Drools Rule File (Use to rewrite incoming log messages)
> # See: https://www.graylog.org/documentation/general/rewriting/
> #rules_file = /etc/graylog/server/rules.drl
>
> # Email transport
> #transport_email_enabled = false
> #transport_email_hostname = mail.example.com
> #transport_email_port = 587
> #transport_email_use_auth = true
> #transport_email_use_tls = true
> #transport_email_use_ssl = true
> #transport_email_auth_username = [email protected] <javascript:>
> #transport_email_auth_password = secret
> #transport_email_subject_prefix = [graylog]
> #transport_email_from_email = [email protected] <javascript:>
>
> # Specify and uncomment this if you want to include links to the stream in 
> your stream alert mails.
> # This should define the fully qualified base url to your web interface 
> exactly the same way as it is accessed by your users.
> #transport_email_web_interface_url = https://graylog.example.com
>
> # The default connect timeout for outgoing HTTP connections.
> # Values must be a positive duration (and between 1 and 2147483647 when 
> converted to milliseconds).
> # Default: 5s
> #http_connect_timeout = 5s
>
> # The default read timeout for outgoing HTTP connections.
> # Values must be a positive duration (and between 1 and 2147483647 when 
> converted to milliseconds).
> # Default: 10s
> #http_read_timeout = 10s
>
> # The default write timeout for outgoing HTTP connections.
> # Values must be a positive duration (and between 1 and 2147483647 when 
> converted to milliseconds).
> # Default: 10s
> #http_write_timeout = 10s
>
> # HTTP proxy for outgoing HTTP connections
> #http_proxy_uri =
>
> # Disable the optimization of Elasticsearch indices after index cycling. 
> This may take some load from Elasticsearch
> # on heavily used systems with large indices, but it will decrease search 
> performance. The default is to optimize
> # cycled indices.
> #disable_index_optimization = true
>
> # Optimize the index down to <= index_optimization_max_num_segments. A 
> higher number may take some load from Elasticsearch
> # on heavily used systems with large indices, but it will decrease search 
> performance. The default is 1.
> #index_optimization_max_num_segments = 1
>
> # The threshold of the garbage collection runs. If GC runs take longer 
> than this threshold, a system notification
> # will be generated to warn the administrator about possible problems with 
> the system. Default is 1 second.
> #gc_warning_threshold = 1s
>
> # Connection timeout for a configured LDAP server (e. g. ActiveDirectory) 
> in milliseconds.
> #ldap_connection_timeout = 2000
>
> # Enable collection of Graylog-related metrics into MongoDB
> # WARNING: This will add *a lot* of data into your MongoDB database on a 
> regular interval (1 second)!
> # DEPRECATED: This setting and the respective feature will be removed in a 
> future version of Graylog.
> #enable_metrics_collection = false
>
> # Disable the use of SIGAR for collecting system stats
> #disable_sigar = false
>
> # The default cache time for dashboard widgets. (Default: 10 seconds, 
> minimum: 1 second)
> #dashboard_widget_default_cache_time = 10s
>
> # Automatically load content packs in "content_packs_dir" on the first 
> start of Graylog.
> #content_packs_loader_enabled = true
>
> # The directory which contains content packs which should be loaded on the 
> first start of Graylog.
> content_packs_dir = /usr/share/graylog-server/contentpacks
>
> # A comma-separated list of content packs (files in "content_packs_dir") 
> which should be applied on
> # the first start of Graylog.
> # Default: empty
> content_packs_auto_load = grok-patterns.json
>
>

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