What did Germany agree to in the armistice?

THE COMPELLED CROSS OF 1918 was concluded on November 11 in Compiègne, near the station of Retond (France) in a car-car between Germany, defeated in World War I of 1914-1918, on the one hand, and France, Great Britain, the USA and other imperialist states of the anti-German coalition, on the other. The terms of the Compiènian armistice agreed between the governments of the United States, Great Britain and France were dictated by Marshal F. Foch of the German delegation headed by M. Erzberger. They provided for the cessation of hostilities, the evacuation within 15 days of the French-occupied areas of France, the territory of Belgium, Luxembourg, and Alsace-Lorraine, the transfer by the German army of military equipment under a special list, the cleansing of the left bank of the Rhine and the creation of a demilitarized zone on its right bank , the immediate return to Germany of all its troops from the territories of the countries formerly part of Austria-Hungary, from Romania and Turkey, as well as the evacuation of German troops from the East full-time Africa. The Compiègne truce also included the demands of Germany's refusal of the Bucharest peace treaty of 1918 and the Brest Peace of 1918, the immediate return of the cash assets of the Belgian National Bank, as well as the Russian and Romanian gold seized by Germany, the surrender to the allies of German submarines, immediate disarmament and internment of German military ships, the evacuation of all the ports of the Black Sea by Germany and the transfer to the Allies of all Russian ships captured by the Germans in the Black Sea. The agreement obliged Germany to immediately return to its homeland (without reciprocity) all the allied prisoners of war and hand over to the allies 5,000 locomotives, 150,000 wagons and 5,000 trucks. The Compiègne truce had an anti-Soviet orientation, which manifested itself in articles that provided for the abandonment of German troops in the occupied Soviet territory. The Allies also retained part of the German army for the struggle against the Soviet state and the revolutionary movement in Germany itself. The agreement provided for the "free entry and exit from the Baltic" of all the military and merchant ships of the Entente, which prepared an armed intervention against the Soviet state. The Compiègne truce was concluded for a period of 36 days with the right of extension (extended on 13 December 1918, on 16 January 1919 and on 16 February 1919); was the gateway to the Treaty of Versailles of 1919.

A distinction must be made between Germany's politicians and rank-and-file Germans. Nobody, neither the Germans, nor the Allies expected Germany to collapse so suddenly in November 1918. It's true that Ludendorf's final offensive of the war failed, but the Allies counter-attack, especially the effort of the U.S. forces under Pershing, fared nearly as badly. With his troops bogged down in autumn mud, Pershing was on the verge of being replaced until he delegated some of his authority to junior officers by creating a general staff that could better manage his forces.
When the final Allied offensive began taking territory that the Germans held before they invaded Belgium in 1914, Ludendorf demanded an armistice. President Wilson refused to give an armistice unless Germany deposed the Kaiser. When this happened Germany was thrown into political chaos. The German high command and politicians knew that the war was lost, and they knew that the Allies could easily invade Germany (part of the Rhineland was actually occupied after the armistice). So the politicians knew that they had no choice but accept the Allies' terms at Versailles.
In contrast, Germany's civilians and soldiery saw the German Army march home from the battlefield in perfect order and fully armed. Neither the civilians, nor the Army believed that Germany had lost the War. This lead to the "stab in the back" myth that both the Nazis and the Communists would campaign on while fighting for control. Surely, Germany's Army didn't lose the War- it couldn't have. But, it did lose the War even if the Germans wouldn't accept it.

It's important to make a distinction between the armistice—the actual agreement that ended the war in 1918—and the Treaty of Versailles of the following year. Under the armistice, the Germans were required to cease hostilities immediately and withdraw their forces behind the Rhine, allowing Allied troops to occupy the strategically important economic area of the Rhineland. The Germans also had to agree to maintain infrastructure such as roads, railways, and bridges, and surrender all weapons and materiel. Mention was made in the armistice about reparations that the Germans would have to pay for starting the war, but the precise terms of these payments were not specified.
That is, until the following year, when the Treaty of Versailles declared Germany solely responsible for starting World War One and imposed harsh, draconian terms on the German government such as the following:
The demilitarization of the Rhineland. (No German troops would be allowed there.)
The return of Alsace-Lorraine to France.
The rich coalfields of the Saarland would be given to France for 15 years.
The German Army and Navy were to be severely restricted; Germany was also banned from having an Air Force.
And last, but not least, Germany, having been held responsible for starting the war, was ordered to pay the staggering sum of 132 billion gold marks in reparations—or compensation—for all the damage that they'd caused.