Situation

Need Transfer System Log To GCP Logging

Install

curl -sSO https://dl.google.com/cloudagents/add-logging-agent-repo.sh
sudo bash add-logging-agent-repo.sh --also-install

Restart Service, Check Service Status And Check Service Log

service google-fluentd restart

service google-fluentd status

tail /var/log/google-fluentd/google-fluentd.log

Using Proxy With google-fluentd

Edit /etc/default/google-fluentd

Add These

export http_proxy="http://proxy-ip:proxy-port"
export https_proxy="http://proxy-ip:proxy-port"
export no_proxy=169.254.169.254 

Query Your Logging

resource.type="gce_instance"
resource.labels.instance_id="<instance-id"
logName="projects/<project-name>/logs/syslog"
"journal"

Ref - Google Cloud Doc