Documentation: Outdated fluentd image name, UID details, link update (#…

…2112)

* documentation update: Fluentd docker image name, UID for docker image, and link to installing as container

* Reverted to fix the name of the Ruby gem while keeping name change for Docker image

docs/README.md

@@ -19,7 +19,8 @@ simplifies the operation and significantly lowers the cost of Loki.
 2. [Installation](installation/README.md)
     1. [Installing with Tanka](installation/tanka.md)
     2. [Installing with Helm](installation/helm.md)
-    3. [Installing Locally](installation/local.md)
+    3. [Installing with Docker](installation/docker.md)
+    4. [Installing locally](installation/local.md)
 3. [Getting Started](getting-started/README.md)
     1. [Grafana](getting-started/grafana.md)
     2. [LogCLI](getting-started/logcli.md)

docs/clients/fluentd/README.md

@@ -119,18 +119,20 @@ This plugin automatically adds a `fluentd_thread` label with the name of the buf
 
 ## Docker Image
 
-There is a Docker image `grafana/fluent-plugin-grafana-loki:master` which contains [default configuration files](https://github.com/grafana/loki/tree/master/fluentd/fluent-plugin-grafana-loki/docker/conf). By default, fluentd containers use the configurations but you can also specify your `fluentd.conf` with `FLUENTD_CONF` environment variable.
+There is a Docker image `grafana/fluent-plugin-loki:master` which contains [default configuration files](https://github.com/grafana/loki/tree/master/fluentd/fluent-plugin-loki/docker/conf). By default, fluentd containers use the configurations but you can also specify your `fluentd.conf` with `FLUENTD_CONF` environment variable.
 
 This image also uses `LOKI_URL`, `LOKI_USERNAME`, and `LOKI_PASSWORD` environment variables to specify the Loki's endpoint, user, and password (you can leave the USERNAME and PASSWORD blank if they're not used).
 
+This image will start an instance of Fluentd to forward incoming logs to the specified Loki url. As an alternate, containerized applications can also use [docker driver plugin](../docker-driver/README.md) to ship logs without needing Fluentd.
+
 ### Example
 
 A Docker Compose configuration that will work looks like:
 
 ```
 services:
   fluentd:
-    image: grafana/fluent-plugin-grafana-loki:master
+    image: grafana/fluent-plugin-loki:master
     command:
       - "fluentd"
       - "-v"

docs/installation/docker.md

@@ -23,7 +23,10 @@ docker run -v $(pwd):/mnt/config -v /var/log:/var/log grafana/promtail:1.5.0 -co
 
 When finished, loki-config.yaml and promtail-config.yaml are downloaded in the directory you chose. Docker containers are running Loki and Promtail using those config files.
 
-Navigate to http://localhost:3100/metrics to view the output.
+Navigate to http://localhost:3100/metrics to view the metrics and http://localhost:3100/ready for readiness.
+
+As of v1.5.0, image is configured to run by default as user loki with  UID `10001` and GID `10001`. You can use a different user, specially if you are using bind mounts, by specifying uid with docker run command
+by specifying `--user=UID` with numeric UID suited to your needs.
 
 **Windows**