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@@ -1610,6 +1610,30 @@ container exits with a non-zero exit status more than 10 times in a row
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Docker will abort trying to restart the container. Providing a maximum
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restart limit is only valid for the ** on-failure ** policy.
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+### Adding entries to a container hosts file
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+
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+You can add other hosts into a container's `/etc/hosts` file by using one or more
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+`--add-host` flags. This example adds a static address for a host named `docker`:
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+
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+```
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+ $ docker run --add-host=docker:10.180.0.1 --rm -it debian
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+ $$ ping docker
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+ PING docker (10.180.0.1): 48 data bytes
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+ 56 bytes from 10.180.0.1: icmp_seq=0 ttl=254 time=7.600 ms
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+ 56 bytes from 10.180.0.1: icmp_seq=1 ttl=254 time=30.705 ms
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+ ^C--- docker ping statistics ---
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+ 2 packets transmitted, 2 packets received, 0% packet loss
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+ round-trip min/avg/max/stddev = 7.600/19.152/30.705/11.553 ms
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+```
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+
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+> **Note:**
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+> Sometimes you need to connect to the Docker host, which means getting the IP
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+> address of the host. You can use the following shell commands to simplify this
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+> process:
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+>
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+> $ alias hostip="ip route show 0.0.0.0/0 | grep -Eo 'via \S+' | awk '{ print \$2 }'"
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+> $ docker run --add-host=docker:$(hostip) --rm -it debian
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+
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## save
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Usage: docker save [OPTIONS] IMAGE [IMAGE...]
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Fred Lifton