Support max_size logoptions

Docker supports log-opt max_size and so does conmon (ALthough poorly).
Adding support for this allows users to at least make sure their containers
logs do not become a DOS vector.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

2 files changed, 23 insertions, 11 deletions

diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md
index 28c340d2f..3303ae572 100644
--- a/docs/source/markdown/podman-create.1.md
+++ b/docs/source/markdown/podman-create.1.md
@@ -438,16 +438,22 @@ Not implemented
 
 Logging driver for the container.  Currently available options are *k8s-file*, *journald*, and *none*, with *json-file* aliased to *k8s-file* for scripting compatibility.
 
-**--log-opt**=*path*
+**--log-opt**=*name*=*value*
 
-Logging driver specific options.  Used to set the path to the container log file.  For example:
+Set custom logging configuration. The following *name*s are supported:
 
-`--log-opt path=/var/log/container/mycontainer.json`
+- **path**: specify a path to the log file
+(e.g. **--log-opt path=/var/log/container/mycontainer.json**);
 
-**--log-opt**=*tag*
+- **max-size**: specify a max size of the log file
+(e.g. **--log-opt max-size=10mb**);
 
-Set custom logging configuration.  Presently supports the `tag` option
-which specified a custom log tag for the container.  For example:
+- **tag**: specify a custom log tag for the container
+(e.g. **--log-opt tag="{{.ImageName}}"**.
+
+It supports the same keys as **podman inspect --format**.
+
+This option is currently supported only by the **journald** log driver.
 
 `--log-opt tag="{{.ImageName}}"`
 
diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md
index a27b1b175..d9bcc49ae 100644
--- a/docs/source/markdown/podman-run.1.md
+++ b/docs/source/markdown/podman-run.1.md
@@ -452,12 +452,18 @@ Logging driver for the container. Currently available options are **k8s-file**,
 
 **--log-opt**=*name*=*value*
 
+Logging driver specific options.
+
 Set custom logging configuration. The following *name*s are supported:
-- **path**: specify a path to the log file (e.g.
-**--log-opt path=/var/log/container/mycontainer.json**);
-- **tag**: specify a custom log tag for the container (e.g.
-**--log-opt tag="{{.ImageName}}"**. It supports the same
-keys as **podman inspect --format**.
+
+**path**: specify a path to the log file
+    (e.g. **--log-opt path=/var/log/container/mycontainer.json**);
+
+**max-size**: specify a max size of the log file
+    (e.g. **--log-opt max-size=10mb**);
+
+**tag**: specify a custom log tag for the container
+   (e.g. **--log-opt tag="{{.ImageName}}"**.
 
 This option is currently supported only by the **journald** log driver.