This page (revision-52) was last changed on 23-Apr-2022 17:05 by Harry Metske

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Version Date Modified Size Author Changes ... Change note
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49 23-Apr-2022 17:05 48 KB Harry Metske to previous | to last
48 23-Apr-2022 17:05 48 KB Harry Metske to previous | to last
47 23-Apr-2022 17:05 48 KB Harry Metske to previous | to last
46 23-Apr-2022 17:05 39 KB Harry Metske to previous | to last
45 23-Apr-2022 17:05 39 KB Harry Metske to previous | to last
44 23-Apr-2022 17:05 39 KB Harry Metske to previous | to last
43 23-Apr-2022 17:05 38 KB Harry Metske to previous | to last
42 23-Apr-2022 17:05 38 KB Harry Metske to previous | to last DOCKER_OPTS="-s devicemapper"
41 23-Apr-2022 17:05 38 KB HarryMetske to previous | to last

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At line 733 added one line
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At line 736 added 45 lines
%%collapsebox
Linking containers together
You can link a container to another running container by using the {{RUN --link <name>:<alias>}} option.\\
The envvars from the target container then are visible in the source container (potential security issue, don't put sensitive data in envvars in the tgt container) . \\
See the following, first we start a jspwiki container (and expose port 8080) :
{{{
[metskem@vbox docker]$ docker run -d --name wiki --env="jspwiki.baseURL=http://10.0.0.195:8080" --expose=8080 harry:jspwiki-2.10.2-svn-14
ff1e7ec53f0bede9932406826939498ed526bafd6145486d61603c0041d27747
[metskem@vbox docker]$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ff1e7ec53f0b harry:jspwiki-2.10.2-svn-14 "/bin/sh -c '/usr/lo 26 seconds ago Up 24 seconds 8080/tcp wiki
[metskem@vbox docker]$
}}}
Secondly we start another container that links to the wiki container:
{{{
[metskem@vbox ~]$ docker run -ti --link wiki:alias2wiki centos:centos7 bash
[root@f959f7929aae /]# env|sort
ALIAS2WIKI_ENV_jspwiki.baseURL=http://10.0.0.195:8080
ALIAS2WIKI_ENV_jspwiki.basicAttachmentProvider.storageDir=/var/jspwiki/pages
ALIAS2WIKI_ENV_jspwiki.fileSystemProvider.pageDir=/var/jspwiki/pages
ALIAS2WIKI_ENV_jspwiki.pageProvider=VersioningFileProvider
ALIAS2WIKI_ENV_jspwiki.workDir=/var/jspwiki/work
ALIAS2WIKI_ENV_jspwiki.xmlGroupDatabaseFile=/var/jspwiki/etc/groupdatabase.xml
ALIAS2WIKI_ENV_jspwiki.xmlUserDatabaseFile=/var/jspwiki/etc/userdatabase.xml
ALIAS2WIKI_NAME=/thirsty_darwin/alias2wiki
ALIAS2WIKI_PORT=tcp://172.17.0.15:8080
ALIAS2WIKI_PORT_8080_TCP=tcp://172.17.0.15:8080
ALIAS2WIKI_PORT_8080_TCP_ADDR=172.17.0.15
ALIAS2WIKI_PORT_8080_TCP_PORT=8080
ALIAS2WIKI_PORT_8080_TCP_PROTO=tcp
HOME=/root
HOSTNAME=f959f7929aae
<< snip >>
}}}
Now you can see the envvars from the wiki container in the centos container, prefixed with <aliasname>_ENV_ .
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This page (revision-52) was last changed on 23-Apr-2022 17:05 by Harry MetskeTop