Notice: Unfortunately, this project is currently put into maintenance mode. Please do not send any PR for new features. We will still fix bugs if there is any.
HAProxy image that balances between linked containers and, if launched in Docker Cloud or using Docker Compose v2, reconfigures itself when a linked cluster member redeploys, joins or leaves.
The available version can be found here: https://hub.docker.com/r/dockercloud/haproxy/tags/
latestis built against master branchstagingis built against staging branchx.x.xis built against git tags on github
Attention : Please ALWAYS use a specific image tag that works for you. DO NOT use dockercloud/haproxy:latest in any situation other than testing purpose.
You can use dockercloud/haproxy in three different ways:
- running in Docker Cloud (Cloud Mode)
- running with Docker legacy links (Legacy Mode)
- running with Docker Compose v2 (Compose Mode, compatible with Docker Swarm)
- running with Docker SwarmMode (Swarm Mode)
-
Launch the service you want to load-balance using Docker Cloud.
-
Launch the load balancer. To do this, select "Jumpstarts", "Proxies" and select
dockercloud/haproxy. During the "Environment variables" step of the wizard, link to the service created earlier (the name of the link is not important), and add "Full Access" API role (this will allow HAProxy to be updated dynamically by querying Docker Cloud's API).Note:
- If you are using
docker-cloud cli, orstackfile, please setrolestoglobal - Please DO NOT set
sequential_deployment: trueon this image.
- If you are using
That's it - the haproxy container will start querying Docker Cloud's API for an updated list of containers in the service and reconfigure itself automatically, including:
- start/stop/terminate containers in the linked application services
- start/stop/terminate/scale up/scale down/redeploy the linked application services
- add new links to HAProxy
- remove old links from HAProxy
web:
image: 'dockercloud/hello-world:latest'
target_num_containers: 2
lb:
image: 'dockercloud/haproxy:latest'
links:
- web
ports:
- '80:80'
roles:
- global
Docker 1.12 supports SwarmMode natively. dockercloud/haproxy will auto config itself to load balance all the services running on the same network:
-
Create a new network using
docker network create -d overlay <name>command -
Launch
dockercloud/haproxyservice on that network on manager nodes. -
Launch your application services that need to be load balanced on the same network.
Note
- You HAVE TO set the environment variable
SERVICE_PORTS=<port1>, <port2>in your application service, which are the ports you would like to expose. - For
dockercloud/haproxyservice: If you mount/var/run/docker.sock, it can only be run on swarm manager nodes. If you want the haproxy service to run on worker nodes, you need to setup DOCKER_HOST envvar that points to the manager address.
- You HAVE TO set the environment variable
- If your application services need to access other services(database, for example), you can attach your application services to two different network, one is for database and the other one for the proxy
- This feature is still experimental, please let us know if you find any bugs or have any suggestions.
docker network create -d overlay proxy
docker service create --name haproxy --network proxy --mount target=/var/run/docker.sock,source=/var/run/docker.sock,type=bind -p 80:80 --constraint "node.role == manager" dockercloud/haproxy
docker service create -e SERVICE_PORTS="80" --name app --network proxy --constraint "node.role != manager" dockercloud/hello-world
docker service scale app=2
docker service update --env-add VIRTUAL_HOST=web.org app
Legacy link refers to the link created before docker 1.10, and the link created in default bridge network in docker 1.10 or after.
docker run -d --name web1 dockercloud/hello-world
docker run -d --name web2 dockercloud/hello-world
docker run -d -p 80:80 --link web1:web1 --link web2:web2 dockercloud/haproxy
web1:
image: 'dockercloud/hello-world:latest'
web2:
image: 'dockercloud/hello-world:latest'
lb:
image: 'dockercloud/haproxy:latest'
links:
- web1
- web2
ports:
- '80:80'
Note: Any link alias sharing the same prefix and followed by "-/_" with an integer is considered to be from the same service. For example: web-1 and web-2 belong to service web, app_1 and app_2 are from service app, but app1 and web2 are from different services.
Docker Compose 1.6 supports a new format of the compose file. In the new version(v2), the old link that injects environment variables is deprecated.
Similar to using legacy links, here list some differences that you need to notice:
- This image must be run using Docker Compose, as it relies on the Docker Compose labels for configuration.
- The container needs access to the docker socket, you must mount the correct files and set the related environment to make it work.
- A link is required in order to ensure that dockercloud/haproxy is aware of which service it needs to balance, although links are not needed for service discovery since docker 1.10. Linked aliases are not required.
- DO not overwrite
HOSTNAMEenvironment variable indockercloud/haproxy container. - As it is the case on Docker Cloud, auto reconfiguration is supported when the linked services scales or/and the linked container starts/stops.
- The container name is maintained by docker-compose, and used for service discovery as well. Please DO NOT change
container_nameof the linked service in the compose file to a non-standard name. Otherwise, that service will be ignored.
version: '2'
services:
web:
image: dockercloud/hello-world
lb:
image: dockercloud/haproxy
links:
- web
volumes:
- /var/run/docker.sock:/var/run/docker.sock
ports:
- 80:80
version: '2'
services:
web:
image: dockercloud/hello-world
lb:
image: dockercloud/haproxy
links:
- web
environment:
- DOCKER_TLS_VERIFY
- DOCKER_HOST
- DOCKER_CERT_PATH
volumes:
- $DOCKER_CERT_PATH:$DOCKER_CERT_PATH
ports:
- 80:80
Once the stack is up, you can scale the web service using docker-compose scale web=3. dockercloud/haproxy will automatically reload its configuration.
When using links like previous section, the Docker Swarm scheduler can be too restrictive. Even with overlay network, swarm (As of 1.1.0) will attempt to schedule haproxy on the same node as the linked service due to legacy links behavior. This can cause unwanted scheduling patterns or errors such as "Unable to find a node fulfilling all dependencies..."
Since Compose V2 allows discovery through the service names, Dockercloud haproxy only needs the links to indentify which service should be load balanced.
A second option is to use the ADDITIONAL_SERVICES variable for indentification of services.
- Set the
ADDITIONAL_SERVICESenv variable to your linked services. - You also want to set depends_on to ensure the web service is started before haproxy so that the hostname can be resolved. This controls scheduling order but not location.
- The container still needs access to the docker daemon to get load balanced containers' configs.
- If any trouble with haproxy not updating the config, try running reload.sh or set the
DEBUGenvvar. - This image is also compatible with Docker Swarm, and supports the docker native
overlaynetwork across multi-hosts.
version: '2'
services:
web:
image: dockercloud/hello-world
blog:
image: dockercloud/hello-world
lb:
image: dockercloud/haproxy
depends_on:
- web
- blog
environment:
- ADDITIONAL_SERVICES=project_dir:web,project_dir:blog
volumes:
- /var/run/docker.sock:/var/run/docker.sock
ports:
- 80:80
Settings in this part is immutable, you have to redeploy HAProxy service to make the changes take effects
| Environment Variable | Default | Description |
|---|---|---|
| ADDITIONAL_BACKEND_<NAME> | add an additional backend with the name set in . Possible values include:balance source, server 127.0.0.1:8080 |
|
| ADDITIONAL_BACKEND_FILE_<NAME> | add an additional backend with the name set in and value of the contents of specified file. | |
| ADDITIONAL_SERVICES | list of additional services to balance (es: prj1:web,prj2:sql). Discovery will be based on `com.docker.compose.[project |
|
| BALANCE | roundrobin | load balancing algorithm to use. Possible values include: roundrobin, static-rr, source, leastconn. See:HAProxy:balance |
| CA_CERT_FILE | the path of a ca-cert file. This allows you to mount your ca-cert file directly from a volume instead of from envvar. If set, CA_CERT envvar will be ignored. Possible value: /cacerts/cert0.pem |
|
| CA_CERT | CA cert for haproxy to verify the client. Use the same format as DEFAULT_SSL_CERT |
|
| CERT_FOLDER | the path of certificates. This allows you to mount your certificate files directly from a volume instead of from envvars. If set, DEFAULT_SSL_CERT and SSL_CERT from linked services are ignored. Possible value:/certs/ |
|
| DEFAULT_SSL_CERT | Default ssl cert, a pem file content with private key followed by public certificate, '\n'(two chars) as the line separator. should be formatted as one line - see SSL Termination | |
| EXTRA_BIND_SETTINGS | comma-separated string(<port>:<setting>) of extra settings, and each part will be appended to the related port bind section in the configuration file. To escape comma, use \,. Possible value: 443:accept-proxy, 80:name http |
|
| EXTRA_DEFAULT_SETTINGS | comma-separated string of extra settings, and each part will be appended to DEFAULT section in the configuration file. To escape comma, use \, |
|
| EXTRA_DEFAULT_SETTINGS_FILE | File whose contents will be included in the DEFAULT section of the configuration file. | |
| EXTRA_FRONTEND_SETTINGS_<PORT> | comma-separated string of extra settings, and each part will be appended frontend section with the port number specified in the name of the envvar. To escape comma, use \,. E.g. EXTRA_FRONTEND_SETTINGS_80=balance source, maxconn 2000 |
|
| EXTRA_FRONTEND_SETTINGS_FILE_<PORT> | File whose contents will be appended to the frontend section with the port number specified in the filename. | |
| EXTRA_GLOBAL_SETTINGS | comma-separated string of extra settings, and each part will be appended to GLOBAL section in the configuration file. To escape comma, use \,. Possible value: tune.ssl.cachesize 20000, tune.ssl.default-dh-param 2048 |
|
| EXTRA_GLOBAL_SETTINGS_FILE | File whose contents will be included in the GLOBAL section of the configuration file. | |
| EXTRA_ROUTE_SETTINGS | a string which is append to the each backend route after the health check, can be over written in the linked services. Possible value: "send-proxy" | |
| EXTRA_SSL_CERTS | list of extra certificate names separated by comma, eg. CERT1, CERT2, CERT3. You also need to specify each certificate as separate env variables like so: CERT1="<cert-body1>", CERT2="<cert-body2>", CERT3="<cert-body3>" |
|
| FORCE_DEFAULT_BACKEND | True | set the default_service as a default backend. This is useful when you have more than one backend and you don't want your default_service as a default backend |
| HEALTH_CHECK | check | set health check on each backend route, possible value: "check inter 2000 rise 2 fall 3". See:HAProxy:check |
| HTTP_BASIC_AUTH | a comma-separated list of credentials(<user>:<pass>) for HTTP basic auth, which applies to all the backend routes. To escape comma, use \,. Attention: DO NOT rely on this for authentication in production |
|
| HTTP_BASIC_AUTH_SECURE | a comma-separated list of credentials(<user>:<encrypted-pass>) for HTTP basic auth, which applies to all the backend routes. To escape comma, use \,. See:HAProxy:user Attention: DO NOT rely on this for authentication in production |
|
| MAXCONN | 4096 | sets the maximum per-process number of concurrent connections. |
| MODE | http | mode of load balancing for HAProxy. Possible values include: http, tcp, health |
| MONITOR_PORT | the port number where monitor_uri should be added to. Use together with MONITOR_URI. Possible value: 80 |
|
| MONITOR_URI | the exact URI which we want to intercept to return HAProxy's health status instead of forwarding the request.See: http://cbonte.github.io/haproxy-dconv/configuration-1.5.html#4-monitor-uri. Possible value: /ping |
|
| OPTION | redispatch | comma-separated list of HAProxy option entries to the default section. |
| RELOAD_TIMEOUT | 0 | When haproxy is reconfigured, a new process starts and attaches to the TCP socket for new connections, leaving the old process to handle existing connections. This timeout specifies how long the old process is permitted to continue running before being killed. -1: Old process is killed immediately0: No timeout, old process will run as long as TCP connections last. This could potentially be quite a while as http-keep-alives are enabled which will keep TCP connections open.>0: Timeout in secs after which the process will be killed. |
| RSYSLOG_DESTINATION | 127.0.0.1 | the rsyslog destination to where HAProxy logs are sent |
| SKIP_FORWARDED_PROTO | If set to any value, HAProxy will not add an X-Forwarded- headers. This can be used when combining HAProxy with another load balancer | |
| SSL_BIND_CIPHERS | explicitly set which SSL ciphers will be used for the SSL server. This sets the HAProxy ssl-default-bind-ciphers configuration setting. |
|
| SSL_BIND_OPTIONS | no-sslv3 | explicitly set which SSL bind options will be used for the SSL server. This sets the HAProxy ssl-default-bind-options configuration setting. The default will allow only TLSv1.0+ to be used on the SSL server. |
| STATS_AUTH | stats:stats | username and password required to access the Haproxy stats. |
| STATS_PORT | 1936 | port for the HAProxy stats section. If this port is published, stats can be accessed at http://<host-ip>:<STATS_PORT>/ |
| TIMEOUT | connect 5000, client 50000, server 50000 | comma-separated list of HAProxy timeout entries to the default section. |
| NBPROC | 1 | sets the nbproc entry to the global section. By default, only one process is created, which is the recommended mode of operation. |
| HAPROXY_USER | haproxy | sets the user of the UNIX sockets to the designated system user name |
| HAPROXY_GROUP | haproxy | sets the group of the UNIX sockets to the designated system group name |
Settings here can overwrite the settings in HAProxy, which are only applied to the linked services. If run in Docker Cloud, when the service redeploys, joins or leaves HAProxy service, HAProxy service will automatically update itself to apply the changes
| Environment Variable | Description |
|---|---|
| BALANCE | load balancing algorithm to use. Possible values include: roundrobin, static-rr, source, leastconn. See:HAProxy:balance |
| COOKIE | sticky session option. This needs to be set on the application service, rather than the HAProxy service. Possible value SRV insert indirect nocache. See:HAProxy:cookie |
| DEFAULT_SSL_CERT | similar to SSL_CERT, but stores the pem file at /certs/cert0.pem as the default ssl certs. If multiple DEFAULT_SSL_CERT are specified in linked services and HAProxy, the behavior is undefined |
| EXCLUDE_PORTS | if set, the application by the application services to the backend routes. You can exclude the ports that you don't want to be routed, like database port |
| EXCLUDE_BASIC_AUTH | if set(any value) and HTTP_BASIC_AUTH global setting is set, no basic auth will be applied to this service. |
| EXTRA_ROUTE_SETTINGS | a string which is append to the each backend route after the health check,possible value: "send-proxy" |
| EXTRA_SETTINGS | comma-separated string of extra settings, and each part will be appended to either related backend section or listen session in the configuration file. To escape comma, use \,. Possible value: balance source |
| FAILOVER | if set(any value), it configures this service to be run as HAProxy backup for other configured service(s) in this backend |
| FORCE_SSL | if set(any value) together with ssl termination enabled. HAProxy will redirect HTTP request to HTTPS request. |
| GZIP_COMPRESSION_TYPE | enable gzip compression. The value of this envvar is a list of MIME types that will be compressed. Some possible values: text/html text/plain text/css application/javascript. See:HAProxy:compression |
| HEALTH_CHECK | set health check on each backend route, possible value: "check inter 2000 rise 2 fall 3". See:HAProxy:check |
| HSTS_MAX_AGE | enable HSTS. It is an integer representing the max age of HSTS in seconds, possible value: 31536000 |
| HTTP_CHECK | enable HTTP protocol to check on the servers health, possible value: "OPTIONS * HTTP/1.1\r\nHost:\ www". See:HAProxy:httpchk |
| OPTION | comma-separated list of HAProxy option entries. option specified here will be added to related backend or listen part, and overwrite the OPTION settings in the HAProxy container |
| SSL_CERT | ssl cert, a pem file with private key followed by public certificate, '\n'(two chars) as the line separator |
| TCP_PORTS | comma separated ports(e.g. 9000, 9001, 2222/ssl). The port listed in TCP_PORTS will be load-balanced in TCP mode. Port ends with /ssl indicates that port needs SSL termination. |
| VIRTUAL_HOST_WEIGHT | an integer of the weight of an virtual host, used together with VIRTUAL_HOST, default:0. It affects the order of acl rules of the virtual hosts. The higher weight one virtual host has, the more priority that acl rules applies. |
| VIRTUAL_HOST | specify virtual host and virtual path. Format: [scheme://]domain[:port][/path], .... wildcard * can be used in domain and path part |
Swarm Mode only settings:
| Name | Type | Description |
|---|---|---|
| SERVICE_PORTS | envvar | comma separated ports(e.g. 80, 8080), which are the ports you would like to expose in your application service. This envvar is swarm mode only, and it is MUST be set in swarm mode |
com.docker.dockercloud.haproxy.deactivate=<true|false> |
label | when this label is set to true, haproxy will ignore the service. Could be useful for switching services on blue/green testing |
Check the HAProxy configuration manual for more information on the above.
web:
image: 'dockercloud/hello-world:latest'
target_num_containers: 2
environment:
- TCP_PORTS=443
- EXCLUDE_PORTS=22
lb:
image: 'dockercloud/haproxy:latest'
links:
- web
ports:
- '80:80'
roles:
- global
Both virtual host and virtual path can be specified in environment variable VIRTUAL_HOST, which is a set of comma separated urls with the format of [scheme://]domain[:port][/path].
| Item | Default | Description |
|---|---|---|
| scheme | http | possible values: http, https, wss |
| domain | virtual host. * can be used as the wildcard |
|
| port | 80/433 | port number of the virtual host. When the scheme is https wss, the default port will be to 443 |
| /path | virtual path, starts with /. * can be used as the wildcard |
| Virtual host | Match | Not match |
|---|---|---|
| http://example.com | example.com | www.example.com |
| example.com | example.com | www.example.com |
| example.com:90 | example.com:90 | example.com |
| https://example.com | https://example.com | example.com |
| https://example.com:444 | https://example.com:444 | https://example.com |
| *.example.com | www.example.com | example.com |
| *example.com | www.example.com, example.com, anotherexample.com | www.abc.com |
| www.e\*e.com | www.example.com, www.exxe.com | www.axxa.com |
| www.example.\* | www.example.com, www.example.org | example.com |
| * | any website with HTTP | |
| https://* | any website with HTTPS | |
| */path | example.com/path, example.org/path?u=user | example.com/path/ |
| */path/ | example.com/path/, example.org/path/?u=user | example.com/path, example.com/path/abc |
| */path/* | example.com/path/, example.org/path/abc | example.com/abc/path/ |
| */*/path/* | example.com/path/, example.org/abc/path/, example.net/abc/path/123 | example.com/path |
| */*.js | example.com/abc.js, example.org/path/abc.js | example.com/abc.css |
| */*.do/ | example.com/abc.do/, example.org/path/abc.do/ | example.com/abc.do |
| */path/*.php | example.com/path/abc.php | example/abc.php, example.com/root/abc.php |
| *.example.com/*.jpg | www.example.com/abc.jpg, abc.example.com/123.jpg | example.com/abc.jpg |
| */path, */path/ | example.com/path, example.org/path/ | |
| example.com:90, https://example.com | example.com:90, https://example.com |
Note:
- The sequence of the acl rules generated based on VIRTUAL_HOST are random. In HAProxy, when an acl rule with a wide scope(e.g. *.example.com) is put before a rule with narrow scope(e.g. web.example.com), the narrow rule will never be reached. As a result, if the virtual hosts you set have overlapping scopes, you need to use
VIRTUAL_HOST_WEIGHTto manually set the order of acl rules, namely, giving the narrow virtual host a higher weight than the wide one. - Every service that has the same VIRTUAL_HOST environment variable setting will be considered and merged into one single service. It may be useful for some testing scenario.
dockercloud/haproxy supports ssl termination on multiple certificates. For each application that you want ssl terminates, simply set SSL_CERT and VIRTUAL_HOST. HAProxy, then, reads the certificate from the link environment and sets the ssl termination up.
Attention: there was a bug that if an environment variable value contains "=", which is common in the SSL_CERT, docker skips that environment variable. As a result, multiple ssl termination only works on docker 1.7.0 or higher, or in Docker Cloud.
SSL termination is enabled when:
- at least one SSL certificate is set, and
- either
VIRTUAL_HOSTis not set, or it is set with "https" as the scheme.
To set SSL certificate, you can either:
- set
DEFAULT_SSL_CERTindockercloud/haproxy, or - set
SSL_CERTand/orDEFAULT_SSL_CERTin the application services linked to HAProxy
The difference between SSL_CERT and DEFAULT_SSL_CERT is that, the multiple certificates specified by SSL_CERT are stored in as cert1.pem, cert2.pem, ..., whereas the one specified by DEFAULT_SSL_CERT is always stored as cert0.pem. In that case, HAProxy will use cert0.pem as the default certificate when there is no SNI match. However, when multiple DEFAULT_SSL_CERT is provided, only one of the certificates can be stored as cert0.pem, others are discarded.
The certificate specified in dockercloud/haproxy or in the linked application services is a pem file, containing a private key followed by a public certificate(private key must be put before the public certificate and any extra Authority certificates, order matters). You can run the following script to generate a self-signed certificate:
openssl req -x509 -newkey rsa:2048 -keyout key.pem -out ca.pem -days 1080 -nodes -subj '/CN=*/O=My Company Name LTD./C=US'
cp key.pem cert.pem
cat ca.pem >> cert.pem
Once you have the pem file, you can run this command to convert the file correctly to one line:
awk 1 ORS='\\n' cert.pem
Copy the output and set it as the value of SSL_CERT or DEFAULT_SSL_CERT.
There are three method to setup affinity and sticky session:
- set
BALANCE=sourcein your application service. When settingsourcemethod of balance, HAProxy will hash the client IP address and make sure that the same IP always goes to the same server. - set
COOKIE=<value>. use application cookie to determine which server a client should connect to. Possible value of<value>could beSRV insert indirect nocache
Check HAProxy:cookie for more information.
By default, dockercloud/haproxy runs in http mode. If you want a linked service to run in a tcp mode, you can specify the environment variable TCP_PORTS, which is a comma separated ports(e.g. 9000, 9001).
For example, if you run:
docker --name app-1 --expose 9000 --expose 9001 -e TCP_PORTS="9000, 9001" your_app
docker --name app-2 --expose 9000 --expose 9001 -e TCP_PORTS="9000, 9001" your_app
docker run --link app-1:app-1 --link app-2:app-2 -p 9000:9000, 9001:9001 dockercloud/haproxy
Then, haproxy balances the load between app-1 and app-2 in both port 9000 and 9001 respectively.
Moreover, If you have more exposed ports than TCP_PORTS, the rest of the ports will be balancing using http mode.
For example, if you run:
docker --name app-1 --expose 80 --expose 22 -e TCP_PORTS=22 your_app
docker --name app-2 --expose 80 --expose 22 -e TCP_PORTS=22 your_app
docker run --link app-1:app-2 --link app-2:app-2 -p 80:80 -p 22:22 dockercloud/haproxy
Then, haproxy balances in http mode at port 80 and balances in tcp on port at port 22.
In this way, you can do the load balancing both in tcp and in http at the same time.
In TCP_PORTS, if you set port that ends with '/ssl', for example 2222/ssl, HAProxy will set ssl termination on port 2222.
Note:
- You are able to set
VIRTUAL_HOSTandTCP_PORTSat the same them, giving more control onhttpmode. - Be careful that, the load balancing on
tcpport is applied to all the services. If you link two(or more) different services using the sameTCP_PORTS,dockercloud/haproxyconsiders them coming from the same service.
There are two ways to enable the support of websocket:
- As websocket starts using HTTP protocol, you can use virtual host to specify the scheme using
wsorwss. For example, `-e VIRTUAL_HOST="ws://ws.example.com, wss://wss.example.com" - Websocket itself is a TCP connection, you can also try the TCP load balancing mentioned in the previous section.
Use the following:
docker run -d --expose 8080 --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 80:80 dockercloud/haproxy
My webapp container exposes port 80 and database ports 8083/8086, and I want the proxy to listen in port 80 without my database ports added to haproxy
docker run -d -e EXCLUDE_PORTS=8803,8806 --expose 80 --expose 8033 --expose 8086 --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 80:80 dockercloud/haproxy
My webapp container exposes port 8080(or any other port), and I want the proxy to listen in port 8080
Use the following:
docker run -d --expose 8080 --name webapp your_app
docker run -d --link webapp:webapp -p 8080:80 dockercloud/haproxy
#### I want the proxy to terminate SSL connections and forward plain HTTP requests to my webapp to port 8080(or any port)
Use the following:
docker run -d -e SSL_CERT="YOUR_CERT_TEXT" --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 443:443 -p 80:80 dockercloud/haproxy
or
docker run -d --link webapp:webapp -p 443:443 -p 80:80 -e DEFAULT_SSL_CERT="YOUR_CERT_TEXT" dockercloud/haproxy
The certificate in YOUR_CERT_TEXT is a combination of private key followed by public certificate. Remember to put \n between each line of the certificate. A way to do this, assuming that your certificate is stored in ~/cert.pem, is running the following:
docker run -d --link webapp:webapp -p 443:443 -p 80:80 -e DEFAULT_SSL_CERT="$(awk 1 ORS='\\n' ~/cert.pem)" dockercloud/haproxy
Use the following:
docker run -d -e FORCE_SSL=yes -e SSL_CERT="YOUR_CERT_TEXT" --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 443:443 dockercloud/haproxy
You can use CERT_FOLDER envvar to specify which folder the certificates are mounted in the container, using the following:
docker run -d --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -e CERT_FOLDER="/certs/" -v $(pwd)/cert1.pem:/certs/cert1.pem -p 443:443 dockercloud/haproxy
Virtual hosts can be configured by the proxy reading linked container environment variables (VIRTUAL_HOST). Here is an example:
docker run -d -e VIRTUAL_HOST="www.webapp1.com, www.webapp1.org" --name webapp1 dockercloud/hello-world
docker run -d -e VIRTUAL_HOST=www.webapp2.com --name webapp2 your/webapp2
docker run -d --link webapp1:webapp1 --link webapp2:webapp2 -p 80:80 dockercloud/haproxy
In the example above, when you access http://www.webapp1.com or http://www.webapp1.org, it will show the service running in container webapp1, and http://www.webapp2.com will go to container webapp2.
If you use the following:
docker run -d -e VIRTUAL_HOST=www.webapp1.com --name webapp1 dockercloud/hello-world
docker run -d -e VIRTUAL_HOST=www.webapp2.com --name webapp2-1 dockercloud/hello-world
docker run -d -e VIRTUAL_HOST=www.webapp2.com --name webapp2-2 dockercloud/hello-world
docker run -d --link webapp1:webapp1 --link webapp2-1:webapp2-1 --link webapp2-2:webapp2-2 -p 80:80 dockercloud/haproxy
When you access http://www.webapp1.com, it will show the service running in container webapp1, and http://www.webapp2.com will go to both containers webapp2-1 and webapp2-2 using round robin (or whatever is configured in BALANCE).
docker run -d -e VIRTUAL_HOST="*.node.io" --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 80:80 dockercloud/haproxy
docker run -d -e VIRTUAL_HOST="web.example.com" -e VIRTUAL_HOST_WEIGHT=1 --name webapp dockercloud/hello-world
docker run -d -e VIRTUAL_HOST="*.example.com" -e VIRTUAL_HOST_WEIGHT=0 --name app dockercloud/hello-world
docker run -d --link webapp:webapp --link app:app -p 80:80 dockercloud/haproxy
docker run -d -e VIRTUAL_HOST="*/path, */path/*" --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 80:80 dockercloud/haproxy
docker run -d -e VIRTUAL_HOST="*/*.htm, */*.html" --name webapp dockercloud/hello-world
docker run -d --link webapp:webapp -p 80:80 dockercloud/haproxy
docker run -d --link webapp:webapp -e STATS_AUTH="auth:auth" -e STATS_PORT=1936 -p 80:80 -p 1936:1936 dockercloud/haproxy
Replace <subdomain> and <port> with your the values matching your papertrailapp account:
docker run -d --name web1 dockercloud/hello-world
docker run -d --name web2 dockercloud/hello-world
docker run -it --env RSYSLOG_DESTINATION='<subdomain>.papertrailapp.com:<port>' -p 80:80 --link web1:web1 --link web2:web2 dockercloud/haproxy
Docker Cloud or Docker Compose v2:
|---- container_a1
|----- service_a ----- |---- container_a2
| (virtual host a) |---- container_a3
internet --- dockercloud/haproxy--- |
| |---- container_b1
|----- service_b ----- |---- container_b2
(virtual host b) |---- container_b3
Legacy links:
|---- container_a1 (virtual host a) ---|
|---- container_a2 (virtual host a) ---|---logic service_a
|---- container_a3 (virtual host a) ---|
internet --- dockercloud/haproxy--- |
|---- container_b1 (virtual host b) ---|
|---- container_b2 (virtual host b) ---|---logic service_b
|---- container_b3 (virtual host b) ---|
In most cases, dockercloud/haproxy will configure itself automatically when the linked services change, you don't need to reload it manually. But for some reason, if you have to do so, here is how:
docker exec <haproxy_id> /reload.sh, if you are on the node where dockercloud/haproxy deploysdocker-cloud exec <haproxy_uuid> /reload.sh, if you use docker-cloud cli